Share-based Compensation [Abstract]
Stock-Based Payments
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Performance Bonds and Guaranty Fund Contributions [Abstract]
Performance Bonds And Security Deposits [Abstract]
Statement [Table]
Statement [Table]
Restricted Cash and Cash Equivalents, Cash and Cash Equivalents [Axis]
Restricted Cash and Cash Equivalents [Axis]
Cash and Cash Equivalents [Domain]
Cash and Cash Equivalents [Domain]
Cash [Member]
Cash [Member]
Non-Cash Deposits and IEF Funds [Member]
Securities and IEF Funds [Member]
Securities and IEF Funds [Member]
Statement [Line Items]
Statement [Line Items]
Performance bonds
Performance bonds
Performance bonds
Guaranty fund contributions
Guaranty Fund Contributions
Guaranty Fund Contributions
Cross-margin arrangements
Cross-margin arrangements
Cross-margin arrangements
Performance collateral for delivery
Performance collateral for delivery
Performance collateral for delivery
Total
Good Faith and Margin Deposits with Broker-Dealers
Statement of Stockholders' Equity Parentheticals [Abstract]
Statement of Stockholders' Equity Parentheticals [Abstract]
Statement, Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Report Date [Axis]
Report Date [Axis]
Financial Statements Date [Domain]
Financial Statements Date [Domain]
Statement, Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Adjustments for Change in Accounting Principle [Axis]
Adjustments for Change in Accounting Principle [Axis]
Adjustments for Change in Accounting Principle [Domain]
Adjustments for Change in Accounting Principle [Domain]
Adjustments for Error Corrections [Axis]
Adjustments for Error Corrections [Axis]
Adjustments for Error Correction [Domain]
Adjustments for Error Correction [Domain]
Common Stock, Dividends, Per Share, Declared
Common Stock, Dividends, Per Share, Declared
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Defined Benefit Plans and Other Postretirement Benefit Plans [Domain]
Defined Benefit Plans and Other Postretirement Benefit Plans [Domain]
Pension Plans, Defined Benefit [Member]
Pension Plans, Defined Benefit [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits, by Type of Deferred Compensation [Axis]
Postretirement Benefits, Type of Deferred Compensation [Axis]
Type of Deferred Compensation [Domain]
Type of Deferred Compensation, All Types [Domain]
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member]
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member]
Savings Plans [Member]
Defined Contribution Pension [Member]
Non-Qualified Plans [Member]
Non-Qualified Plans [Member]
Non-Qualified Plans
NYMEX Members' Retirement Plan and Benefits [Member]
NYMEX Members' Retirement Plan and Benefits [Member]
Retirement Plan and Benefits
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Age for participation eligibility in benefit plan
Eligible Age To Participate In Benefit Plan
Eligible age to participate in benefit plan
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Cash Balance Interest Crediting Rate
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Cash Balance Interest Crediting Rate
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Cash Balance Interest Crediting Rate
Years of service for vesting eligibility
Years Of Service For Vesting Eligibility
Years of service for vesting eligibility
Accumulated benefit obligation
Defined Benefit Plan, Accumulated Benefit Obligation
Excess of pension plan assets over the projected benefit obligation
Defined Benefit Plan, Funded Status of Plan
Defined Benefit Plan Funding Goal Percentage
Defined Benefit Plan Funding Goal Percentage
Defined Benefit Plan Funding Goal Percentage
Estimated liabilities exceeding the fair value of the plan assets
Pension Plans Benefit Obligation Liabilities Exceeded Fair Value Of Plan Assets
Pension Plans Benefit Obligation Liabilities Exceeded Fair Value Of Plan Assets
Estimated contribution to meet projected excess of pension plan liabilities of pension plan assets
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year
Debt instrument, maturity date range, start (in years)
Debt Instrument, Maturity Date Range, Start
Debt instrument, maturity date range, end (in years)
Debt Instrument, Maturity Date Range, End
Amortization of actuarial loss from accumulated other comprehensive income (loss) into net periodic benefit costs
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year
Percentage of employees base salary matched by employer, maximum
Defined Contribution Plan, Employer Matching Contribution, Percent
Aggregate expense from merging of saving plans
Defined Contribution Plan, Cost Recognized
Trading Securities
Trading Securities
Minimum annual contribution NYMEX Members' Retirement Plan and Benefits
Minimum Annual Contribution NYMEX Members Retirement Plan And Benefits
Minimum Annual Contribution NYMEX Members Retirement Plan And Benefits
Total contribution
Total Contribution To NYMEX Members Retirement Plan And Benefits
Total Contribution To NYMEX Members Retirement Plan And Benefits
Total obligation
Total Obligation to NYMEX Members Retirement Plan and Benefits
Total Obligation to NYMEX Members Retirement Plan and Benefits
Fair value of assets
Fair Value Of Assets Under NYMEX Members Retirement Plan And Benefits
Fair Value Of Assets Under NYMEX Members Retirement Plan And Benefits
Property, Plant and Equipment, Net [Abstract]
Property
Property, Plant and Equipment Disclosure [Text Block]
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Effect of derivative instruments on the statements of Income and Shareholders' Equity
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]
Statement of Financial Position Parentheticals [Abstract]
Statement of Financial Position Parentheticals [Abstract]
Series A junior participating preferred stock [Member]
Series A Preferred Stock [Member]
Series B Preferred Stock [Member]
SeriesAJuniorParticipatingPreferredStock [Member]
SeriesAJuniorParticipatingPreferredStock [Member]
Class A Common Stock (Shares) [Member]
Common Class A [Member]
Class B Common Stock (Shares) [Member]
Common Class B [Member]
Allowance for Doubtful Accounts Receivable
Allowance for Doubtful Accounts Receivable
Restricted Cash and Cash Equivalents, Current
Restricted Cash and Cash Equivalents, Current
Restricted Cash and Cash Equivalents, Noncurrent
Restricted Cash and Cash Equivalents, Noncurrent
Preferred Stock, Par or Stated Value Per Share
Preferred Stock, Par or Stated Value Per Share
Preferred Stock, Shares Authorized
Preferred Stock, Shares Authorized
Preferred Stock, Shares Issued
Preferred Stock, Shares Issued
Preferred Stock, Shares Outstanding
Preferred Stock, Shares Outstanding
Common Stock, Par or Stated Value Per Share
Common Stock, Par or Stated Value Per Share
Common Stock, Shares Authorized
Common Stock, Shares Authorized
Common Stock, Shares, Outstanding
Common Stock, Shares, Outstanding
Common Stock, Shares, Issued
Common Stock, Shares, Issued
Quarterly Financial Data [Abstract]
Quarterly Information
Schedule of Quarterly Financial Information [Table Text Block]
Income Tax Disclosure [Abstract]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance as of January 1
Unrecognized Tax Benefits
Additions based on tax positions related to the current year
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions
Additions for tax positions of prior years
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions
Reductions for tax positions of prior years
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions
Reductions resulting from the lapse of statutes of limitations
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations
Settlements with taxing authorities
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities
Balance as of December 31
Intangible Assets and Goodwill [Abstract]
Intangible Assets and Goodwill [Abstract]
Goodwill by Segment [Axis]
Business Segments [Axis]
Goodwill, Segment [Domain]
Segment [Domain]
CBOT holdings [Member]
CBOT Holdings [Member]
CBOT Holdings [Member]
NYMEX holdings [Member]
NYMEX Holdings [Member]
NYMEX Holdings [Member]
Index Services [Member]
Index Services [Member]
Index Services [Member]
Other Affiliates [Member]
Other Affiliates [Member]
Total Goodwill, beginning balance
Goodwill
Business Combinations
Goodwill, Acquired During Period
Goodwill, Written off Related to Sale of Business Unit
Goodwill, Written off Related to Sale of Business Unit
Other Activity
Goodwill, Translation and Purchase Accounting Adjustments
Total Goodwill, ending balance
Debt [Abstract]
Debt [Abstract]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Fair value of fixed rate notes due August 2013 [Member]
Fair value of fixed rate notes due August 2013 [Member]
Fair Value Of Fixed Rate Notes Due August 2013 [Member]
Fair value of fixed rate notes due February 2014 [Member]
Fair value of fixed rate notes due February 2014 [Member]
Fair Value Of Fixed Rate Notes Due February 2014 [Member]
Fair value of fixed rate notes due March 2018 [Member]
Fair value of fixed rate notes due March 2018 [Member]
Fair Value Of Fixed Rate Notes Due March 2018 [Member]
Seven Hundred Fifty Million Fixed Rate Notes Due March Two Thousand Twenty Two, Interest Equal To Four Point Three Zero Percent [Member]
Seven Hundred Fifty Million Fixed Rate Notes Due March Two Thousand Twenty Two, Interest Equal To Four Point Three Zero Percent [Member]
Seven Hundred Fifty Million Fixed Rate Notes Due March Two Thousand Twenty Two, Interest Equal To Four Point Three Zero Percent [Member]
Debt instrument, fair value
Debt Instrument, Fair Value Disclosure
Debt instrument, face amount
Debt Instrument, Face Amount
Debt Instrument, maturity date
Debt Instrument, Maturity Date
Pension Plans [Member]
Components of Net Pension Expense:
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost
Defined Benefit Plan, Service Cost
Interest cost
Defined Benefit Plan, Interest Cost
Expected return on plan assets
Defined Benefit Plan, Expected Return on Plan Assets
Recognized net actuarial loss
Defined Benefit Plan, Amortization of Gains (Losses)
Net Pension Expense
Defined Benefit Plan, Net Periodic Benefit Cost
Assumptions Used to Determine End-of-Year Benefit Obligation:
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate
Rate of compensation increase
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase
Cash balance interest crediting rate
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Cash Balance Interest Crediting Rate
Cash Balance Interest Crediting Rate
Assumptions Used to Determine Net Pension Expense:
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
Rate of compensation increase
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
Expected return on plan assets
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Fair Value Measurements
Fair Value Disclosures [Text Block]
Guarantees [Abstract]
Schedule of Guarantor Obligations [Table]
Schedule of Guarantor Obligations [Table]
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Domain]
Guarantor Obligations, Nature [Domain]
MFGlobal [Member]
MFGlobal [Member]
MFGlobal [Member]
PFG [Member]
PFG [Member]
PFG [Member]
Credit Rating [Axis]
Credit Rating [Axis]
Credit Rating [Domain]
Credit Rating [Domain]
Underlying Asset Class [Axis]
Underlying Asset Class [Axis]
Underlying Asset Class [Domain]
Underlying Asset Class [Domain]
Guarantor Obligations [Line Items]
Guarantor Obligations [Line Items]
PaymentPerParticipant
PaymentPerParticipant
PaymentPerParticipant
Agreement automatic renewal period
Agreement Automatic Renewal, Period
Agreement Automatic Renewal, Period
Contingent liability to SGX, amount of irrevocable letters of credit
Guarantor Obligations, Collateral Held Directly or by Third Parties
PaymentPerCooperative
PaymentPerCooperative
PaymentPerCooperative
Percentage allocated to CME and OCC of gains (losses) on liquidation of open position and cross margin account
Percentage Allocated To Parent And External Party Of Cross Margin Arrangement Of Gains Losses On Liquidation Of Open Position And Cross Margin Account
Percentage allocated to parent and external party of cross-margin arrangement of gains (losses) on liquidation of open position and cross-margin account
Maximum payment to trustee under event of over distribution of property than permitted by bankruptcy code and CFTC regulations
Maximum Payment to Trustee Under Event of Over Distribution of Property Than Permitted by Bankruptcy Code and CFTC Regulations
Maximum Payment to Trustee Under Event of Over Distribution of Property Than Permitted by Bankruptcy Code and CFTC Regulations
Guarantor obligations, current carrying value
Guarantor Obligations, Current Carrying Value
FutureLosses
FutureLosses
FutureLosses
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts Disclosure [Table]
Valuation and Qualifying Accounts Disclosure [Table]
Valuation Allowances and Reserves Type [Axis]
Valuation Allowances and Reserves Type [Axis]
Valuation Allowances and Reserves [Domain]
Valuation Allowances and Reserves [Domain]
Allowance for doubtful accounts
Allowance for Doubtful Accounts [Member]
Allowance for deferred tax assets
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation and Qualifying Accounts Disclosure [Line Items]
Movement in Valuation Allowances and Reserves [Roll Forward]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year
Valuation Allowances and Reserves, Balance
Charged against goodwill
Valuation Allowances and Reserves, Reserves of Businesses Acquired
Charged (credited) to costs and expenses
Valuation Allowances and Reserves, Charged to Cost and Expense
Foreign currency translation adjustment
Valuation Allowances and Reserves, Adjustments
Other
Valuation Allowances and Reserves, Charged to Other Accounts
Balance at end of year
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding in Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding in Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding in Shares [Roll Forward]
Number of shares outstanding at December 31, 2010 (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Number of shares granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Number of shares vested
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Number of shares cancelled
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Number of shares outstanding at December 31, 2011 (shares)
Weighted average grant date fair value granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted average grant date fair value vested
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Weighted average grant date fair value cancelled
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Weighted average grant date fair value outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Income Statement [Abstract]
Revenues
Revenues [Abstract]
Clearing and transaction fees
Clearing And Execution Servicing
Fees earned by providing executing servicing and clearing, net of rebates.
Market data and information services
Market Data Revenue
Access and communication fees
Access and communication fees
Revenue from providing access fees to customers for the use of electronic trading platform and revenue from telecommunication networks and communication services.
Other
Other Revenue, Net
Total Revenues
Revenues
Expenses
Costs and Expenses [Abstract]
Compensation and benefits
Labor and Related Expense
Communications
Communication
Technology support services
Information Technology and Data Processing
Professional fees and outside services
Professional Fees
Amortization of purchased intangibles
Amortization of Intangible Assets
Depreciation and amortization
Depreciation, Depletion and Amortization, Nonproduction
Occupancy and building operations
Occupancy, Net
Licensing and other fee agreements
License Costs
Other
Other Cost and Expense, Operating
Total Expenses
Costs and Expenses
Operating Income
Operating Income (Loss)
Non-Operating Income (Expense)
Nonoperating Income (Expense) [Abstract]
Investment income
Investment Income, Nonoperating
Impairment of long-term investments
Other than Temporary Impairment Losses, Investments
Gains (losses) on derivative investments
Gain (Loss) on Derivative Instruments, Net, Pretax
Interest and other borrowing costs
Interest and Debt Expense
Guarantee of exercise right privileges
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments
Equity in net (gains) losses of unconsolidated subsidiaries
Income (Loss) from Equity Method Investments
Other income (expense)
Other Nonoperating Income (Expense)
Total Non-Operating
Nonoperating Income (Expense)
Income before Income Taxes
Income Loss From Continuing Operations Before Income Taxes
Sum of operating profit and nonoperating income (expense) before income taxes.
Income tax provision
Income Tax Expense (Benefit)
Net Income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Less: net income attributable to redeemable non-controlling interest
Net Income (Loss) Attributable to Noncontrolling Interest
Net Income Attributable to CME Group
Net Income (Loss) Attributable to Parent
Earnings per Common Share Attributable to CME Group:
Earnings Per Share [Abstract]
Basic
Earnings Per Share, Basic
Diluted
Earnings Per Share, Diluted
Weighted Average Number of Common Shares:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic
Weighted Average Number of Shares Outstanding, Basic
Diluted
Weighted Average Number of Shares Outstanding, Diluted
Capital Stock [abstract]
Capital Stock [Abstract]
Class A Common Stock
Class B Common Stock, Class B1 [Member]
Class B Common Stock, Class B1 [member]
Class B Common Stock, Class B1 [Member]
Class B Common Stock, Class B2 [Member]
Class B Common Stock, Class B2 [member]
Class B Common Stock, Class B2 [Member]
Class B Common Stock, Class B3 [Member]
Class B Common Stock, Class B3 [Member]
Class B Common Stock, Class B3 [Member]
Class B Common Stock, Class B4 [Member]
Class B Common Stock, Class B4 [member]
Class B Common Stock, Class B4 [Member]
Capital stock
Schedule of Stock by Class [Table Text Block]
Financial instruments measured at fair value on a recurring basis
Fair Value, Measurement Inputs, Disclosure [Text Block]
Reconciliation of assets and liabilities valued at fair value on a recurring basis using significant unobservable inputs (level 3)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Performance bonds
Performance Bond Letters Of Credit
Performance Bond Letters Of Credit
Total Letters of Credit
Letters of Credit
Letters of Credit
Marketable Securities [Abstract]
Marketable Securities
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Subsequent Events [Abstract]
Subsequent Event [Table]
Subsequent Event [Table]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Stock Options [Member]
Stock Options [Member]
Restricted Stock [Member]
Restricted Stock [Member]
Option Indexed to Issuer's Equity, Type [Axis]
Option Indexed to Issuer's Equity, Type [Axis]
Option Indexed to Issuer's Equity, Type [Domain]
Option Indexed to Issuer's Equity, Type [Domain]
Net income attributable to CME Group
Effect of stock options
Dilutive Securities, Effect on Basic Earnings Per Share, Including Options and Restrictive Stock Units
Effect of restricted stock awards
Incremental Common Shares Attributable to Share-based Payment Arrangements
Diluted
Earnings per common share, basic
Earnings per common share, diluted
Outstanding anti-dilutive options
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Commitments [Abstract]
Commitments [Abstract]
Major Property Class [Axis]
Major Property Class [Axis]
Major Property Class [Domain]
Major Property Class [Domain]
First Lease Renewal Option [Member]
First Lease Renewal Option [Member]
First Lease Renewal Option [Member]
Second Lease Renewal Option [Member]
Second Lease Renewal Option [Member]
Second Lease Renewal Option [Member]
Property Subject to or Available for Operating Lease [Axis]
Property Subject to or Available for Operating Lease [Axis]
Property Subject to or Available for Operating Lease [Domain]
Property Subject to or Available for Operating Lease [Domain]
Chicago [Member]
Chicago [Member]
Chicago [Member]
Additional Office Space Chicago [Member]
Additional Office Space Chicago [Member]
Additional Office Space Chicago [Member]
Operating leases number of renewal options
Operating Leases Number Of Renewal Options
Operating leases number of renewal options
Operating leases renewal option, period (in years)
Operating Leases Renewal Option, Period
Operating leases renewal option, period
Operating leases, rent expense
Operating Leases, Rent Expense
Short-term Debt, Type [Axis]
Short-term Debt, Type [Domain]
Commercial Paper [Member]
Forward starting interest rate swap agreement fixed rate
Forward starting interest rate swap agreement fixed rate
Forward starting interest rate swap agreement, fixed rate
Commercial paper maturity date range start, days
Commercial Paper Maturity Date Range Start
Commercial Paper Maturity Date Range Start
Commercial paper maturity date range end, days
Commercial Paper Maturity Date Range End
Commercial Paper Maturity Date Range End
Weighted average balance, at par value, of commercial paper outstanding
Short-term Debt, Average Outstanding Amount
Maximum month-end balance for commercial paper
Short-term Debt, Maximum Month-end Outstanding Amount
Available-for-sale securities
Available-for-sale Securities [Table Text Block]
Amortized cost and fair value of marketable securities by contractual maturity
Investments Classified by Contractual Maturity Date [Table Text Block]
Commitments
Commitments Disclosure [Text Block]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Lease Agreements [Member]
Lease Agreements [Member]
CBOT Building [Member]
CBOT Building [Member]
CBOT Building [Member]
CMA [Member]
CMA [Member]
CMA [Member]
Proceeds from Sale of Intangible Assets
Proceeds from Sale of Intangible Assets
Net book value
Finite-Lived Intangible Assets, Net
Disposal Group, Including Discontinued Operation, Intangible Assets, Net
Disposal Group, Including Discontinued Operation, Intangible Assets, Net
Acquired Finite-lived Intangible Asset, Amount
Acquired Finite-lived Intangible Asset, Amount
Impairment charge to reduce the carrying amount of Credit Market Analysis, Ltd. goodwill to its estimated fair value
Goodwill, Impairment Loss
Intangible assets-other, net
Intangible Assets, Net (Excluding Goodwill)
Long-term Investments [Abstract]
Long-term Investments
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Other Liabilities [Member]
Other Liabilities [Member]
ExpectedReclassificationAdjustment
ExpectedReclassificationAdjustment
ExpectedReclassificationAdjustment
Derivative, Notional Amount
Derivative, Notional Amount
Fair value of the interest rate derivative instruments
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net
Loss on derivative instruments
Derivative Instruments, Loss Recognized in Income
Gain related to settlement from Lehman bankruptcy proceedings
Gain (Loss) Related to Litigation Settlement
2012
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
2013
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2014
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2015
Finite-Lived Intangible Assets, Amortization Expense, Year Four
2016
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Thereafter
Finite-Lived Intangible Assets, Amortization Expense, after Year Five
Guaranty Fund [Axis]
Guaranty Fund [Axis]
Guaranty Fund [Axis]
Guaranty Fund [Domain]
Guaranty Fund [Domain]
[Domain] for Guaranty Fund [Axis]
CME Base Guaranty Fund [Member]
CME Base Guaranty Fund [Member]
CME Base Guaranty Fund [Member]
CME CDS Guaranty Fund [Member] [Member]
CME CDS Guaranty Fund [Member] [Member]
CME CDS Guaranty Fund [Member] [Member]
CME IRS Guaranty Fund [Member] [Member]
CME IRS Guaranty Fund [Member] [Member]
CME IRS Guaranty Fund [Member] [Member]
CMECE Commodity Fund [Member]
CMECE Commodity Fund [Member]
CMECE Commodity Fund [Member]
CMECE Interest Rate Swap [Member]
CMECE Interest Rate Swap [Member]
CMECE Interest Rate Swap [Member]
Line of Credit Facility [Axis]
Lender Name [Axis]
Line of Credit Facility, Lender [Domain]
Line of Credit Facility, Lender [Domain]
364-day fully secured, committed line of credit
Line of Credit Facility, Fully Secured Committed [Member]
Line of Credit Facility, Fully Secured Committed [Member]
Revolving senior credit facility
Letter of Credit Facility, Revolving Senior Credit Facility [Member]
Letter of Credit Facility, Revolving Senior Credit Facility [Member]
Average daily clearing settlement
Average Daily Clearing Settlement
Average Daily Clearing Settlement
Total principal in IEF programs
Total principal in IEF programs
Total principal in IEF programs
Revolving line of credit
Line of Credit, Current
Management fees earned under the IEF programs
I E F Revenue
I E F Revenue
Percentage share of cross-margining collateral
Percentage Share of Cross-margining Collateral
Percentage Share of Cross-margining Collateral
Corporate Contribution
Corporate Contribution
Corporate Contribution
Minimum Corporate Contribution
Minimum Corporate Contribution
Minimum Corporate Contribution
Working capital designated for clearance of default in over the counter credit default swap, percent
Working Capital Percent For Over the Counter Credit Default Swap, Percent
Working Capital Percent For Over the Counter Credit Default Swap, Percent
Working capital designated for clearance of default in over the counter interest rate swap
Working Capital For Over the Counter Interest Rate Swap
Working Capital For Over the Counter Interest Rate Swap
Line of Credit Facility, Maximum Borrowing Capacity
Line of Credit Facility, Maximum Borrowing Capacity
Line of Credit, Guaranty Fund Collateral Available
Line of Credit, Guaranty Fund Collateral Available
Line of Credit, Guaranty Fund Collateral Available
Option on increase in line of credit
Line of Credit Facility, Option to Increase, Maximum Borrowing Capacity
Line of Credit Facility, Option to Increase, Maximum Borrowing Capacity
Days fully secured
Committed Line Of Credit Number Of Days Fully Secured
Committed Line Of Credit Number Of Days Fully Secured
Intraday settlements of cash performance bonds
Intraday settlements of cash performance bonds
Intraday settlements of cash performance bonds
Defined Benefit Plan by Plan Asset Categories [Axis]
Defined Benefit Plan, Asset Categories [Axis]
Plan Asset Categories [Domain]
Plan Asset Categories [Domain]
US Equity [Member]
US Equity [Member]
US Equity [Member]
Foreign Equity [Member]
Foreign Equity Mutual Fund [Member]
Foreign Equity Mutual Fund [Member]
Fixed Income [Member]
Fixed Income Funds [Member]
Commodity [Member]
Commodity [Member]
Minimum
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum
Maximum
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum
Quarterly Information
Quarterly Financial Information [Text Block]
Subsequent Events
Subsequent Events [Text Block]
Guarantees
Schedule of Guarantor Obligations [Table Text Block]
Schedule of Short-term Debt
Schedule of Short-term Debt [Table Text Block]
Schedule of Long-term Debt
Schedule of Long-term Debt Instruments [Table Text Block]
Long-term debt maturities at par value
Schedule of Maturities of Long-term Debt [Table Text Block]
Fair value of fixed rate notes by maturity date
Fair Value Of Fixed Rate Notes By Maturity Date [Text Block]
Fair Value Of Fixed Rate Notes By Maturity Date [Text Block]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Range [Domain]
Minimum [Member]
Minimum [Member]
Maximum [Member]
Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis]
Defined Benefit Plans and Other Postretirement Benefit Plans [Domain]
CME Group Omnibus Stock Plan [Member]
CME Group Omnibus Stock Plan [Member]
CME Group Omnibus Stock Plan [Member]
Employee Stock Purchase Plan; Class A Shares [Member]
Employee Stock Purchase Plan; Class A Shares [Member]
Employee Stock Purchase Plan; Class A Shares [Member]
Director Stock Plan; Class A Shares [Member]
Director Stock Plan; Class A Shares [Member]
Director Stock Plan; Class A Shares [Member]
Omnibus Stock Plan [Member]
Omnibus Stock Plan [Member]
Omnibus Stock Plan
Restricted Stock Units (RSUs) [Member]
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Share-based compensation arrangement by share-based payment award, number of shares reserved
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Share-based compensation arrangement by share-based payment award, number of shares authorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Vesting percentage after one year
Vesting Percentage After One Year
Vesting percentage after one year
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized
Employee service share-based compensation, unrecognized compensation costs on nonvested awards, Weighted Average Period of Recognition, years
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition
Stock options, granted, shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures
Exercise price range, lower range limit
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit
Exercise price range, upper range limit
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit
Share-based compensation arrangement by share-based payment award, options, grants in period, weighted average grant date fair value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Share-based compensation arrangement by share-based payment award, options, exercises in period, total intrinsic value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value
Share-based compensation arrangement by share-based payment award, vesting period lower range
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Lower Range
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Lower Range
Share-based compensation arrangement by share-based payment award, vesting period upper range
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Upper Range
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Upper Range
Granted performance shares
Share Based Compensation Arrangement by Share Based Payment Award Performance Shares Grants in Period
Share Based Compensation Arrangement by Share Based Payment Award Performance Shares Grants in Period
Granted performance shares, value
Share Based Compensation Arrangement by Share Based Payment Award Performance Shares Grants in Period, Value
Share Based Compensation Arrangement by Share Based Payment Award Performance Shares Grants in Period, Value
Restricted Class A common stock, fair value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value
Total expense for stock payments
Allocated Share-based Compensation Expense
Share-based compensation arrangement by share-based payment award, discount from market price
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date
Class A common stock issued to participating employees
Class A Common Stock Issued To Participating Employees
Class A common stock issued to participating employees
Annual award of class A common stock value
Annual Award Of Class A Common Stock Value
Annual award of class A common stock value
Annual stipend allowance in shares of stock
Annual Stipend Allowance In Shares Of Stock
Annual stipend allowance in shares of stock
Annual stipend allowance in shares of stock (in shares)
Annual Stipend Allowance In Shares Of Stock (In Shares)
Annual stipend allowance in shares of stock (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Share-based compensation arrangements expected life
Share-based compensation arrangements expected life
Share-based compensation arrangements expected life
2012
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months
2013
Long-term Debt, Maturities, Repayments of Principal in Year Two
2014
Long-term Debt, Maturities, Repayments of Principal in Year Three
2015
Long-term Debt, Maturities, Repayments of Principal in Year Four
2016
Long-term Debt, Maturities, Repayments of Principal in Year Five
Thereafter
Long-term Debt, Maturities, Repayments of Principal after Year Five
Statement of Stockholders' Equity [Abstract]
Preferred stock [Member]
Preferred Stock [Member]
Common Stock and Additional Paid-in Capital [Member]
Common Stock Including Additional Paid in Capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Parent [Member]
Parent [Member]
Noncontrolling Interest [Member]
Noncontrolling Interest [Member]
Total Equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Common Stock, Shares, Outstanding
Comprehensive income:
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax
Change in net unrealized loss on derivatives, net of tax
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax
Change in foreign currency translation adjustment, net of tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Total comprehensive income attributable to CME Group
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Cash dividend on common stock
Dividends, Cash
Class A common stock issued to BM&FBOVESPA S.A. (in shares)
Stock Issued During Period Shares To Partner Exchange
Stock issued during period, shares to partner exchange
Class A common stock issued to BM&FBOVESPA S.A.
Stock Issued During Period To Partner Exchange
Stock issued during period to partner exchange
Repurchase of Class A common stock (in shares)
Stock Repurchased During Period, Shares
Repurchase of Class A common stock
Stock Repurchased During Period, Value
Noncontrolling Interest, Increase from Business Combination
Noncontrolling Interest, Increase from Business Combination
tax benefit from partnership allocation
tax benefit from partnership allocation
tax benefit from partnership allocation
Exercise of stock options (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Exercise of stock options
Stock Issued During Period, Value, Stock Options Exercised
Excess tax benefits from option exercises and restricted stock vesting
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation
Vesting of issued restricted Class A common stock (in shares)
Vesting Of Issued Restricted Stock
Number of shares issued during the period as a result of the vesting of restricted stock units.
Vesting of issued restricted Class A common stock
Vesting Of Issued Restricted Stock Value
Vesting Of Issued Restricted Stock
Shares issued to Board of Directors (in shares)
Stock Issued To Related Parties During Period Shares
Number of shares of stock issued during the period to related parties.
Shares issued to Board of Directors
Stock Issued To Related Parties During Period Value
Value of stock issued during the period to related parties.
Shares issued under Employee Stock Purchase Plan (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Shares issued under Employee Stock Purchase Plan
Stock Issued During Period, Value, Employee Stock Purchase Plan
Stock-based compensation
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures
Balance (in shares)
Summary of the change in projected benefit obligation
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
Change in plan assets
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]
Fair value of plan assets
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Components of net pension expenses and the assumptions used to determine the end-of-year projected benefit obligation and net pension expense in aggregate
Schedule of Net Benefit Costs [Table Text Block]
Asset allocation for the plan
Schedule of Allocation of Plan Assets [Table Text Block]
Prior service costs and actuarial losses included in accumulated other comprehensive income (loss)
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
Anticipated benefit payments from the plan in future years
Schedule of Expected Benefit Payments [Table Text Block]
Compensation expense for stock-based payments and total income tax benefit recognized
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
Schedule of Nonvested Share Activity [Table Text Block]
Schedule of Nonvested Share Activity [Table Text Block]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance at January 1
Defined Benefit Plan, Fair Value of Plan Assets
Actual return on plan assets
Defined Benefit Plan, Actual Return on Plan Assets
Employer contributions
Defined Benefit Plan, Contributions by Employer
Benefits paid
Defined Benefit Plan, Benefits Paid
Balance at December 31
Loss Contingency [Abstract]
Contingencies
Schedule of Loss Contingencies by Contingency [Table Text Block]
2012
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months
2013
Defined Benefit Plan, Expected Future Benefit Payments, Year Two
2014
Defined Benefit Plan, Expected Future Benefit Payments, Year Three
2015
Defined Benefit Plan, Expected Future Benefit Payments, Year Four
2016
Defined Benefit Plan, Expected Future Benefit Payments, Year Five
2017-2021
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter
Debt
Debt Disclosure [Text Block]
Components of intangible assets
Intangible Assets Disclosure [Text Block]
Weighted average useful life for the amortizable intangible assets
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Future estimated amortization expense
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Goodwill activity
Schedule of Goodwill [Table Text Block]
Summary of the Property Accounts
Property, Plant and Equipment [Table Text Block]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Derivative Instrument Risk [Axis]
Derivative Instrument Risk [Axis]
Derivative Contract Type [Domain]
Derivative Contract Type [Domain]
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net
Performance Bonds and Guaranty Fund Contributions
Performance Bonds And Security Deposits [TextBlock]
Performance Bonds And Security Deposits [TextBlock]
Prior Service Cost Balance
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax
Actuarila Loss Balance
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax
Unrecognized loss
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax
Prior Service Cost Balance
Actuarila Loss Balance
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value by Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurements, Recurring [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value, Inputs, level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, level 3 [Member]
Fair Value, Inputs, Level 3 [Member]
Schedule of Trading Securities and Other Trading Assets, Major Types of Trading Securities and Assets [Axis]
Major Types of Debt and Equity Securities [Axis]
Major Types of Trading Securities and Assets [Domain]
Major Types of Debt and Equity Securities [Domain]
Municipal Bonds [Member]
Municipal Bonds [Member]
US Treasury Securities [Member]
US Treasury Securities [Member]
Mutual funds [Member]
Mutual funds [Member]
Mutual Funds [Member]
Domestic Corporate Debt Securities [Member]
Domestic Corporate Debt Securities [Member]
Asset-backed Securities [Member]
Asset-backed Securities [Member]
US Government Agencies Debt Securities [Member]
US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities at Fair Value
Available-for-sale Securities, Fair Value Disclosure
Trading Securities at Fair Value
Trading Securities, Fair Value Disclosure
Marketable Securities at Fair Value
Investments, Fair Value Disclosure
Investment Owned, at Fair Value
Investment Owned, at Fair Value
Total Assets at Fair Value
Assets, Fair Value Disclosure
Derivative Liability, Fair Value, Gross Liability
Derivative Liability, Fair Value, Gross Liability
Interest Rate Swap Contracts at Fair Value
Derivative Financial Instruments, Liabilities, Fair Value Disclosure
Contingent consideration at Fair Value
Business Acquisition, Contingent Consideration, at Fair Value
Total liabilities at fair value
Liabilities, Fair Value Disclosure
Statement of Cash Flows [Abstract]
Cash Flows from Operating Activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Stock-based compensation
Share-based Compensation
Net loss on derivative investments
Derivative, Gain (Loss) on Derivative, Net
Impairment of goodwill and intangible assets
Goodwill and Intangible Asset Impairment
Impairment of long-term investments
MF Global accounts receivable write-off
Provision for Doubtful Accounts
Amortization of debt financing costs and discount accretion
Amortization of Financing Costs and Discounts
Gain on sale of Index Services assets
Gain (Loss) on Sale of Other Assets
Gain on contribution of Dow Jones Index asset group
gain on contribution of assets
gain on contribution of assets
Loss on sale of Credit Market Analysis Ltd.
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal
Equity in net (gains) losses of unconsolidated subsidiaries
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Change in assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Other assets
Increase (Decrease) in Other Operating Assets
Accounts payable
Increase (Decrease) in Accounts Payable
Income tax payable
Increase (Decrease) in Income Taxes Payable
Other current liabilities
Increase (Decrease) in Other Accrued Liabilities
Other liabilities
Increase (Decrease) in Other Operating Liabilities
Other
Other Noncash Income (Expense)
Net Cash Provided by Operating Activities
Net Cash Provided by (Used in) Operating Activities
Cash Flows from Investing Activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Proceeds from maturities of available-for-sale marketable securities
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities
Purchases of available-for-sale marketable securities
Payments to Acquire Available-for-sale Securities
Net change in NYMEX securities lending program investments
Payments for (Proceeds from) Investments
Purchases of property, net
Payments to Acquire Property, Plant, and Equipment
Proceeds from sale of building property
Proceeds from Sale of Property, Plant, and Equipment
Consideration paid in business combinations, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Investments in business ventures
Payments to Acquire Investments
Proceeds from sale of Credit Market Analysis Ltd., net of cash sold with business
ProceedsFromDivestitureOfBusinessNet
ProceedsFromDivestitureOfBusinessNet
Proceeds from sale of Index Services assets
Proceeds from Sale of Other Assets
Proceeds from sale of long-term investment
Proceeds (repayments) of long-term investment
Proceeds (repayments) of long-term investment
Proceeds from Chicago Board Options Exchange exercise right privileges
Proceeds From Exercise Right Priveleges
Proceeds From Exercise Right Privileges
Purchase of Bolsa Mexicana de Valores, S.A.B. de C.V. shares
Payments to Acquire Equity Method Investments
Settlement of derivative related to debt issuance
Payments for (Proceeds from) Derivative Instrument, Investing Activities
Other
Payments for (Proceeds from) Other Investing Activities
Net Cash Provided by (Used in) Investing Activities
Net Cash Provided by (Used in) Investing Activities
Cash Flows from Financing Activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds (repayments) of commercial paper, net
Proceeds from (Repayments of) Other Debt
Proceeds from other borrowings, net of issuance costs
Proceeds from Issuance of Long-term Debt
Repayment of other borrowings
Repayments of Other Debt
Cash dividends
Payments of Dividends
Class A common stock issued to BM&FBOVESPA SA
Common Stock Issued To Partner Exchange
Common stock issued to partner exchange
Repurchase of Class A common stock, including costs
Payments for Repurchase of Common Stock
Proceeds from exercise of stock options
Proceeds from Stock Options Exercised
Distribution paid to non-controlling interest
Payments to Noncontrolling Interests
Excess tax benefits related to employee option exercises and restricted stock vesting
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities
Other
Proceeds from (Payments for) Other Financing Activities
Net Cash Provided by (Used in) Financing Activities
Net Cash Provided by (Used in) Financing Activities
Net change in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents, beginning of period
Cash and Cash Equivalents, at Carrying Value
Cash and Cash Equivalents, End of Period
Supplemental Disclosure of Cash Flow Information
Supplemental Cash Flow Information [Abstract]
Income taxes paid
Income Taxes Paid
Interest paid (excluding securities lending program)
Interest Paid
Non-cash investing activities:
Cash Flow Noncash Investing Disclosure Abstract
Cash Flow, Noncash Investing Disclosure [Abstract]
Investment in S&P/Dow Jones Indices LLC
Noncash or Part Noncash Acquisition, Investments Acquired
Change in net unrealized securities gains (losses)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Non-cash financing activities:
Cash Flow Noncash Financing Activities Disclosure Abstract
Cash Flow, Noncash Financing Activities Disclosure [Abstract]
Fair value of Class A common stock issued in exchange for BM&FBOVESPA SA stock
Stock Issued
Accounting Policies [Abstract]
Principles of Consolidation
Consolidation, Policy [Policy Text Block]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Cash and Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Investment, Policy [Policy Text Block]
Investment, Policy [Policy Text Block]
Fair Value of Financial Instruments
Fair Value of Financial Instruments, Policy [Policy Text Block]
Derivative Investments
Derivatives, Policy [Policy Text Block]
Accounts Receivable
Receivables, Policy [Policy Text Block]
Performance Bonds and Guaranty Fund Contributions
Performance Bonds And Security Deposit [Text Block]
Performance Bonds And Security Deposit [Text Block]
Property, Equipment and Leasehold Improvements
Property, Plant and Equipment, Policy [Policy Text Block]
Operating Leases
Revenue Recognition Leases, Operating [Policy Text Block]
Goodwill and Other Intangible Assets
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Business Combinations
Business Combinations and Other Purchase of Business Transactions, Policy [Policy Text Block]
Employee Benefit Plans
Compensation Related Costs, Policy [Policy Text Block]
Foreign Currency Translation
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Revenue Recognition
Revenue Recognition, Policy [Policy Text Block]
Share-Based Payments
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Marketing Costs
Advertising Costs, Policy [Policy Text Block]
Income Taxes
Income Tax, Policy [Policy Text Block]
Segment Reporting
Segment Reporting Disclosure [Text Block]
Intangible Assets and Goodwill
Goodwill and Intangible Assets Disclosure [Text Block]
Gross unrecognized tax benefits
Unrecognized tax benefits, net of tax impacts in other jurisdictions
Unrecognized Tax Benefits Net Of Tax Impacts In Other Jurisdictions
Unrecognized Tax Benefits Net Of Tax Impacts In Other Jurisdictions
Interest and penalties related to uncertain tax positions
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Interest and penalties recognized in the consolidated statements of income
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
CBOT Holdings Long-Term Equity Plan [Member]
CBOT Holdings Long-Term Equity Plan [Member]
CBOT Holdings Long-Term Equity Plan [Member]
NYMEX Holdings Omnibus Long-Term Incentive Plan [Member]
NYMEX Holdings Omnibus Long-Term Incentive Plan [Member]
NYMEX Holdings Omnibus Long-Term Incentive Plan [Member]
Share Repurchases; Class A Common Stock [Member]
Share Repurchases Class A Common Stock [Member]
Share Repurchases; Class A Common Stock [Member]
Core Rights [Member]
Core Rights [Member]
Core Rights [Member]
Other Voting Rights [Member]
Other Voting Rights [Member]
Other Voting Rights [Member]
Class B Common Stock (Shares)
Class B common stock, Class B1, B2, B3 [Member]
Class B common stock, Class B1, B2, B3 [Member]
Class B common stock, Class B1, B2, B3 [Member]
Common stock, voting rights
Common Stock, Voting Rights
Number of directors
Number of directors
Number of directors
Shares granted, outstanding and exercised
Number of shares reserved for awards under the plan
Shares authorized for future awards, frozen awards
Shares Authorized For Future Awards Under The Plan Frozen
Shares Authorized For Future Awards Under The Plan Frozen
Class A shares awarded under Director Stock Plan
Class A shares awarded under Director Stock Plan
Class A shares awarded under Director Stock Plan
Market value of the shares an Employee Stock Purchase Plan
Market value of the shares an Employee Stock Purchase Plan
Market value of the shares an Employee Stock Purchase Plan
Class A shares Purchased under Employee Stock Purchase Plan
Class A shares Purchased under Employee Stock Purchase Plan
Class A shares Purchased under Employee Stock Purchase Plan
Share Buyback Program
Stock Repurchased And Retired Authorized
Stock Repurchased And Retired Authorized
Number of Shares Company Repurchased
Stock Repurchased and Retired During Period, Shares
Average Purchase Price Per Share
Stock Repurchased And Retired Average Price Per Share
Stock Repurchased And Retired Average Price Per Share
Total Cost of Repurchased Shares
Stock Repurchased and Retired During Period, Value
Aggregate share ownership agreement with BM&FBOVESPA
Aggregate Share Ownership Agreement With BM and FBOVESPA
Aggregate share ownership agreement with BM&FBOVESPA
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Basic and diluted earnings per share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of Held-to-maturity Securities [Table]
Schedule of Held-to-maturity Securities [Table]
Schedule of Held-to-maturity Securities, Major Types of Debt and Equity Securities [Axis]
Debt Security [Axis]
Major Types of Debt Securities [Domain]
Major Types of Debt Securities [Domain]
Schedule of Held-to-maturity Securities [Line Items]
Schedule of Held-to-maturity Securities [Line Items]
Maturity of one year or less, Amortized Cost
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis
Maturity between one and five years, Amortized Cost
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis
Maturity between five and ten years, Amortized Cost
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis
Maturity greater than ten years, Amortized Cost
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis
Total, Amortized Cost
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis
Maturity of one year or less, Fair Value
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value
Maturity between one and five years, Fair Value
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value
Maturity between five and ten years, Fair Value
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value
Maturity greater than ten years, Fair Value
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value
Total, Fair Value
Available-for-sale Securities, Debt Securities
Stock option valuation assumption, expected life
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent
Derivative, Net Hedge Ineffectiveness Gain (Loss)
Derivative, Net Hedge Ineffectiveness Gain (Loss)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, before Tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, before Tax
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax
Other Comprehensive Income (Loss), Net of Tax
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Land and land improvements
Land and Land Improvements [Member]
Building and building improvements
Building and Building Improvements [Member]
Leasehold improvements
Leasehold Improvements [Member]
Furniture, fixtures and equipment
Furniture and Fixtures [Member]
Software and software development costs
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Property, gross
Property, Plant and Equipment, Gross
Less accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, net
Property, Plant and Equipment, Net
Estimated useful life, minimum
Property, Plant and Equipment, Useful Life
Deferred Gain on Sale of Property
Deferred Gain on Sale of Property
Schedule of Finite-Lived Intangible Assets by Major Class [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Clearing Firm, Market Data, and Other Customer Relationships [Member]
Customer Relationships [Member]
Technology-Related Intellectual Property [Member]
Developed Technology Rights [Member]
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Useful life, minimum
Finite-Lived Intangible Asset, Useful Life
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance at January 1
Defined Benefit Plan, Benefit Obligation
Actuarial (gain) loss
Defined Benefit Plan, Actuarial Gain (Loss)
Benefits paid
Balance at December 31
Interest Rate Contract [Member]
Interest Rate Contract [Member]
Foreign Exchange Contract [Member]
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) by Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement and Other Comprehensive Income Location [Domain]
Income Statement Location [Domain]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax
Gains (Losses) Recognized in OCI
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net
Gains (Losses) Reclassified from Accumulated OCI
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Derivative Instruments, Loss Recognized in Income
Gains (Losses) Recognized in Income
Derivative Instruments, Gain (Loss) Recognized in Income, Net
Gain (Loss) Related to Litigation Settlement
Derivative, Net Hedge Ineffectiveness Gain (Loss)
Fair Value Inputs, Discount Rate
Fair Value Inputs, Discount Rate
fair value inputs probability of payout
fair value inputs probability of payout
fair value inputs probability of payout
Cash and securities held as performance bonds and guaranty fund contributions at fair value
Cash And Securities Held As Performance Bonds And Security Deposits At Fair Value [TextBlock]
Cash And Securities Held As Performance Bonds And Security Deposits At Fair Value [TextBlock]
Letters of credit
Schedule of Letters of Credit [Text Block]
Schedule of Letters of Credit.
Taxes on income
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Reconciliation of the statutory U.S. federal income tax rate to the effective tax rate
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Deferred tax assets (liabilities)
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Unrecognized tax benefits
Summary of Income Tax Contingencies [Table Text Block]
Reconciliation of unrecognized tax benefits
Reconciliation Of Unrecognized Tax Benefits [Text Block]
Reconciliation Of Unrecognized Tax Benefits
Other - Finite [Member]
Total Amortizable Intangible Assets [Member]
Total Amortizable Intangible Assets [Member]
Total amortizable intangible assets [Member]
Foreign Currency Translation Adjustments [Member]
Foreign Currency Translation Adjustments [Member]
Foreign Currency Translation Adjustments [Member]
Total Amortizable Intangible Assets, Net [Member]
Total Amortizable Intangible Assets, Net [Member]
Total Amortizable Intangible Assets Net [Member]
Indefinite-lived Intangible Assets by Major Class [Axis]
Indefinite-lived Intangible Assets by Major Class [Axis]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Trade Names [Member]
Trade Names [Member]
Foreign Currency Translation Adjustments Indefinite [Member]
Foreign Currency Translation Adjustments Indefinite [Member]
Foreign currency translation adjustments indefinite [Member]
Cost
Finite-Lived Intangible Assets, Gross
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Net book value
Indefinite-lived Intangible Assets
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Ownership percentage
Noncontrolling Interest, Ownership Percentage by Parent
Impairment Charge
Impairment of Intangible Assets (Excluding Goodwill)
Other Indefinite-lived Intangible Assets
Other Indefinite-lived Intangible Assets
Number of shares outstanding at December 31, 2010 (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Number of shares granted
Number of shares exercised
Number of shares cancelled
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period
Number of shares outstanding at December 31, 2011 (shares)
Number of shares exercisable at December 31, 2011 (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Weighted average exercise price granted
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Weighted average exercise price exercised
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Weighted average exercise price cancelled
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price
Weighted average exercise price outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Weighted average exercise price exercisable at December 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Weighted average remaining contractual life outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Weighted average remaining contractual life exercisable at December 31, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term
Aggregate intrinsic value outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Aggregate intrinsic value exercisable at December 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value
Schedule of future minimum payments under non-cancelable operating leases
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Schedule of other commitments
Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]
Temporary Equity [Abstract]
Changes in Redeemable Non-controlling Interest [Roll Forward]
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance at January 1
Temporary Equity, Carrying Amount, Attributable to Noncontrolling Interest
Contribution by Dow Jones
Temporary Equity, Contribution from Non-controlling Interest Holders
Temporary Equity, Contribution from Non-controlling Interest Holders
Distribution to Dow Jones
Temporary Equity, Distribution to Non-controlling Interest Holders
Temporary Equity, Distribution to Non-controlling Interest Holders
Allocation of stokc-based compensation
Temporary Equity, Other Changes
Total comprehensive income attributable to redeemable non-controlling interest
Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Non-controlling Interest
Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Non-controlling Interest
Balance at December 31
Cash Equivalents [Member]
Cash Equivalents [Member]
Commercial paper [Member]
Term Loan Due 2011, Interest Equal To 3-Month LIBOR Plus 1.00%, Reset Quarterly [Member]
Term Loan Due 2011, Interest Equal To 3-Month LIBOR Plus 1.00%, Reset Quarterly [Member]
Term Loan Due 2011, Interest Equal To 3-Month LIBOR Plus 1.00%, Reset Quarterly
$750.0 Million Fixed Rate Notes Due August 2013, Interest Equal To 5.40% [Member]
Seven Hundred Fifty Million Fixed Rate Notes Due August Two Thousand Thirteen, Interest Equal To Five Point Four Zero Percent [Member]
Fixed Rate Notes Due August 2013, Interest Equal To 5.40%, $750.0 Million
$750.0 Million Fixed Rate Notes Due February 2014, Interest Equal To 5.75% [Member]
Seven Hundred Fifty Million Dollar Fixed Rate Notes Due February Twenty Fourteen, Interest Equal To Five Point Seven Five Percent [Member]
$750.0 Million Fixed Rate Notes Due August 2014, Interest Equal To 5.75%
$612.5 Million Fixed Rate Notes Due March 2018, Interest Equal To 4.40% [Member]
Six Hundred Twelve Point Five Million Fixed Rate Notes Due March Two Thousand Eighteen, Interest Equal To Four Point Four Zero Percent [Member]
$612.5 Million Fixed Rate Notes Due March 2018, Interest Equal To 4.40%
Short-term Debt
Short-term Debt [Abstract]
Short-term debt
Short-term Non-bank Loans and Notes Payable
Basis for effective rate
Debt Instrument, Interest Rate, Basis for Effective Rate
Long-term Debt
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt
Unsecured Long-term Debt, Noncurrent
Stated interest rate percentage
Debt Instrument, Interest Rate, Stated Percentage
Fair value of asset-back securities
Asset-Backed Securities, at Carrying Value
Unrealized losses
Available-for-sale Securities, Gross Unrealized Losses
Unrealized gains
Available-for-sale Securities, Gross Unrealized Gains
Trading securities fair value
Income Taxes
Income Tax Disclosure [Text Block]
Capital Stock
Capital Stock [Text Block]
Capital Stock [Text Block]
Derivative Instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Employee Benefit Plans
Pension and Other Postretirement Benefits Disclosure [Text Block]
Income before income taxes: Domestic
Income (Loss) from Continuing Operations before Income Taxes, Domestic
Income before income taxes: Foreign
Income (Loss) from Continuing Operations before Income Taxes, Foreign
Current income tax provision: Federal
Current Federal Tax Expense (Benefit)
Current income tax provision: State
Current State and Local Tax Expense (Benefit)
Current income tax provision: Foreign
Current Foreign Tax Expense (Benefit)
Current income tax provision: Total
Current Income Tax Expense (Benefit)
Deferred income tax provision: Federal
Deferred Federal Income Tax Expense (Benefit)
Deferred income tax provision: State
Deferred State and Local Income Tax Expense (Benefit)
Deferred income tax provision: Foreign
Deferred Foreign Income Tax Expense (Benefit)
Deferred income tax provision: Total
Total Income Tax Provision
Compensation expense
Income tax benefit recognized
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense
Earnings Per Share
Earnings Per Share [Text Block]
Statutory U.S. federal tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate
State taxes, net of federal benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes
Increase (decrease) in domestic valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance
Impact of revised state apportionment estimates
Impact of Revised State Appointment Estimates
Impact of Revised State Appointment Estimates
Effective Income Tax Rate Reconciliation, Disposition of Business
Effective Income Tax Rate Reconciliation, Disposition of Business
Other, net
Effective Income Tax Rate Reconciliation, Other Adjustments
Effective Tax Rate
Effective Income Tax Rate, Continuing Operations
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Redeemable Non-controlling Interest
Temporary Equity [Table Text Block]
Entity [Abstract]
Entity [Abstract]
Entities [Table]
Entities [Table]
Entity Information [Line Items]
Entity Information [Line Items]
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Document Type
Document Type
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Amendment Flag
Amendment Flag
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Voluntary Filers
Entity Voluntary Filers
Entity Current Reporting Status
Entity Current Reporting Status
Entity Public Float
Entity Public Float
Changes in redeemable non-controlling interest
Redeemable Noncontrolling Interest [Table Text Block]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of liability at period start
Contingent obligation arising from acquisition
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)
Included in operating expense
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings
Fair value of liability at period end
Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Concentration Risk by Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Clearing and transaction fees from Firm 1
Sales Revenue, Clearing and Transaction Fees, Firm One [Member]
Sales Revenue, Clearing and Transaction Fees, Firm One [Member]
Clearing and transaction fees from Firm 2
Sales Revenue, Clearing and Transaction Fees, Firm Two [Member]
Sales Revenue, Clearing and Transaction Fees, Firm Two [Member]
Market data and information services
Sales Revenue, Market Data and Information Services [Member]
Sales Revenue, Market Data and Information Services [Member]
Estimated useful live of the assets minimum in years
Estimated useful lives of software in years
Property, Plant and Equipment, Estimated Useful Lives
Concentration of revenue
Concentration Risk, Percentage
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Foreign Tax Authority [Member]
Foreign Tax Authority [Member]
Domestic Tax Authority [Member]
Domestic Tax Authority [Member]
current [Member]
current [Member]
current [Member]
Noncurrent [Member]
Noncurrent [Member]
Noncurrent [Member]
Net Current Deferred Tax Assets
Deferred Tax Assets, Net of Valuation Allowance, Current
Domestic unrealized loss on investment in BM&FBOVESPA
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses
Deferred Tax Assets, Unrealized Currency Losses
Deferred Tax Assets, Unrealized Currency Losses
Deferred tax asset Domestic Losses
Deferred tax asset Domestic Losses
Deferred tax asset Domestic Losses
Stock-based compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Deferred compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other
Unrealized loss on securities
Deferred Tax Assets, Unrealized Losses on Trading Securities
Accrued expenses and other
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities
Subtotal
Deferred Tax Assets, Gross, Noncurrent
Valuation allowance
Deferred Tax Assets, Valuation Allowance, Noncurrent
Total non-current deferred tax assets
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent
Purchase intangible assets
Deferred Tax Liabilities, Goodwill and Intangible Assets
Property
Deferred Tax Liabilities, Property, Plant and Equipment
Total non-current deferred tax liabilities
Deferred Tax Liabilities, Net, Noncurrent
Net Non-Current Deferred Tax Liabilities
Deferred Tax Assets, Net, Noncurrent
CONTINGENCIES [Abstract]
CONTINGENCIES [Abstract]
Loss Contingencies by Nature of Contingency [Axis]
Loss Contingency Nature [Axis]
Loss Contingency, Nature [Domain]
Loss Contingency, Nature [Domain]
Realtime [Member]
Realtime [Member]
Realtime [Member]
bankruptcy return
bankruptcy return
bankruptcy return
Number of alledged patent infringements
Number of Alledged Patent Infringements
Number of Alledged Patent Infringements
Number of counts
Loss Contingency, New Claims Filed, Number
Damages sought (value)
Loss Contingency, Damages Sought, Value
Accrued liability related to all outstanding legal matters
Estimated Litigation Liability
BM&F [Member]
BM& FBOVESPA SA [Member]
BM&FBOVESPA SA [Member]
Bolsa Mexicana De Valores, S A B De C V [Member]
Bolsa Mexicana De Valores, S A B De C V [Member]
Bolsa Mexicana De Valores, S A B De C V
Bursa Malaysia Derivatives Berhad [Member]
Bursa Malaysia Derivatives Berhad [Member]
Bursa Malaysia Derivatives Berhad [Member]
DME Holdings [Member]
DME Holdings [Member]
DME Holdings [Member]
S&P/DJI [Member]
SandPDJI [Member]
SandPDJI [Member]
Equity Method Investment, Ownership Percentage
Equity Method Investment, Ownership Percentage
Fair value of investment
Loan provided to DME
Payments to Fund Long-term Loans to Related Parties
Cost-basis value of investment
Investment Owned, at Cost
Investment impairment charges
Money Market Funds [Member]
Money Market Funds [Member]
Actual allocation of plan assets, Fixed income
Defined Benefit Plan, Actual Plan Asset Allocations
Operating Leases, Future Minimum Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2012
Operating Leases, Future Minimum Payments Due, Next Twelve Months
2013
Operating Leases, Future Minimum Payments, Due in Two Years
2014
Operating Leases, Future Minimum Payments, Due in Three Years
2015
Operating Leases, Future Minimum Payments, Due in Four Years
2016
Operating Leases, Future Minimum Payments, Due in Five Years
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Total
Operating Leases, Future Minimum Payments Due
Unrecorded Unconditional Purchase Obligation [Abstract]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2012
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months
2013
Unrecorded Unconditional Purchase Obligation, Due within Two Years
2014
Unrecorded Unconditional Purchase Obligation, Due within Three Years
2015
Unrecorded Unconditional Purchase Obligation, Due within Four Years
2016
Unrecorded Unconditional Purchase Obligation, Due within Five Years
Thereafter
Unrecorded Unconditional Purchase Obligation, Due after Five Years
Total
Unrecorded Unconditional Purchase Obligation, Total
Unrecorded Unconditional Purchase Obligation, Total
Internal Revenue Service (IRS) [Member]
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards
Operating Loss Carryforwards
Deferred Tax Assets, Valuation Allowance, Noncurrent
Decrease in the provision for income taxes
Increase (Decrease) in Income Tax Provision
Increase (Decrease) in Income Tax Provision
Change in valuation allowance
Valuation Allowance, Deferred Tax Asset, Change in Amount
Long-term deferred tax asset
Valuation allowance related to deferred tax asset
Deferred Tax Assets, Valuation Allowance
Schedule of Business Acquisitions, by Acquisition [Table]
Dow Jones [Member]
Dow Jones [Member]
Dow Jones
CME Group net of non-controlling interest [Member]
CME Group net of non-controlling interest [Member]
CME Group net of non-controlling interest [Member]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition [Line Items]
Ownership interest acquired
Business Acquisition, Percentage of Voting Interests Acquired
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage
Statement of Financial Position [Abstract]
Assets
Assets [Abstract]
Cash and cash equivalents
Marketable securities
Marketable Securities, Current
Accounts receivable, net of allowance of $0.8 and $1.3
Accounts Receivable, Net, Current
Other current assets (includes $40.0 in restricted cash)
Other Assets, Current
Cash performance bonds and guaranty fund contributions
Total current assets
Assets, Current
Property, net of accumulated depreciation and amortization
Intangible assets-trading products
Goodwill
Other assets (includes $73.0 and $20.5 in restricted cash)
Other Assets, Noncurrent
Total Assets
Assets
Liabilities and Shareholders' Equity
Liabilities and Equity [Abstract]
Accounts payable
Accounts Payable, Current
Other current liabilities
Other Liabilities, Current
Cash performance bonds and guaranty fund contributions
Cash Performance Bonds and Security Deposit Liability
The amount due to other broker-dealers in the form of a deposit paid by the counterparty to demonstrate an intention to complete a purchase (good faith deposit) and also the amount due to a customer in the form of collateral deposited by the counterparty to cover the credit risk assumed by the entity (margin deposit).
Total current liabilities
Liabilities, Current
Deferred tax liabilities, net
Other liabilities
Other Liabilities, Noncurrent
Total Liabilities
Liabilities
Redeemable non-controlling interest
Shareholders' Equity:
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, $0.01 par value, 10,000 and 9,860 shares authorized, none issued or outstanding
Preferred Stock, Value, Issued
Series A junior participating preferred stock, $0.01 par value, 0 and 140 shares authorized, none issued or outstanding
Series A junior participating preferred stock, $0.01 par value, 140 shares authorized, none issued or outstanding
Series A junior participating preferred stock, $0.01 par value, 140 shares authorized, none issued or outstanding
Common stock
Common Stock, Value, Outstanding
Additional paid-in capital
Additional Paid in Capital, Common Stock
Retained earnings
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Total Shareholders' Equity
Stockholders' Equity Attributable to Parent
Non-controlling interest
Stockholders' Equity Attributable to Noncontrolling Interest
Total Liabilities and Shareholders' Equity
Liabilities and Equity
Business Combinations [Abstract]
Business Transactions Disclosure
Business Combination Disclosure [Text Block]
Investment Type [Axis]
Investment Type [Axis]
Investment Type [Domain]
Investment Type Categorization [Domain]
Securities Investment [Member]
Securities Investment [Member]
Fixed Income Investments [Member]
Fixed Income Investments [Member]
Municipal Bonds [Member]
Corporate Bonds [Member]
Available-for-Sale Securities Amortized Cost
Available-for-sale Securities, Amortized Cost Basis
Available-for-Sale Securities Fair Value
Available-for-sale Securities
Total Revenues
Operating Income
Non-operating income (expense)
Income before income taxes
Defined Benefit Plan, Fair Value of Plan Assets by Measurement [Axis]
Fair Value Plan Asset Measurement [Domain]
Defined Benefit Plan, Fair Value of Plan Assets
Schedule of Business Acquisitions, by Acquisition [Table]
TotalCMEGroup [Member]
TotalCMEGroup [Member]
TotalCMEGroup [Member]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
KANSAS CITY BOARD OF TRADE [Member]
KANSAS CITY BOARD OF TRADE [Member]
Business Acquisition [Line Items]
Gain on contribution of Dow Jones Index asset group
Proceeds From Divestiture of Business
Proceeds From Divestiture of Business
Proceeds From Divestiture of Business
Business Acquisition, Cost of Acquired Entity, Purchase Price
Business Acquisition, Cost of Acquired Entity, Purchase Price
Deferred Tax Liabilities, Net
Deferred Tax Liabilities, Net