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Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2016	Oct. 12, 2016
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2016
Entity Registrant Name	CME GROUP INC.
Entity Central Index Key	0001156375
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding		339,347,113
Class B Common Stock, Class B-1 [Member]
Entity Common Stock, Shares Outstanding		625
Class B Common Stock, Class B-2 [Member]
Entity Common Stock, Shares Outstanding		813
Class B Common Stock, Class B-3 [Member]
Entity Common Stock, Shares Outstanding		1,287
Class B Common Stock, Class B-4 [Member]
Entity Common Stock, Shares Outstanding		413

Consolidated Balance Sheets - USD ($)
$ in Millions

Sep. 30, 2016

Dec. 31, 2015

Assets

Cash and cash equivalents

$ 1,420.5

$ 1,692.6

Marketable securities

83.3

72.5

Accounts receivable, net of allowance of $3.6 and $1.9

395.7

357.8

Other current assets (includes $29.5 and $32.0 in restricted cash)

269.4

228.6

Performance bonds and guaranty fund contributions

31,607.1

35,553.0

Total current assets

33,776.0

37,904.5

Property, net of accumulated depreciation and amortization of $577.4 and $788.6

426.7

491.7

Intangible assets—trading products

^[1]

17,175.3

Intangible assets—other, net

2,465.9

2,537.9

Goodwill

7,569.0

Other assets (includes $64.4 and $70.5 in restricted cash)

1,838.4

1,681.0

Total Assets

63,251.3

67,359.4

Liabilities and Equity

Accounts payable

34.5

28.7

Other current liabilities

247.0

1,242.8

Performance bonds and guaranty fund contributions

31,604.9

35,553.0

Total current liabilities

31,886.4

36,824.5

Long-term debt

2,230.7

2,229.3

Deferred income tax liabilities, net

7,317.7

7,358.3

Other liabilities

551.6

395.5

Total Liabilities

41,986.4

46,807.6

Shareholders' Equity:

Preferred stock, $0.01 par value, 10,000 shares authorized at September 30, 2016 and December 31, 2015; none issued

0.0

Additional paid-in capital

17,780.0

17,721.6

Retained earnings

3,458.6

2,907.6

Accumulated other comprehensive income (loss)

22.9

(80.8)

Total shareholders’ equity

21,264.9

20,551.8

Total Liabilities and Equity

63,251.3

67,359.4

Class A Common Stock [Member]

Shareholders' Equity:

Common stock

3.4

Class B Common Stock [Member]

Shareholders' Equity:

Common stock

$ 0.0

[1]

)Trading products represent futures and options products acquired in our business combinations with CBOT Holdings, Inc., NYMEX Holdings, Inc. and The Board of Trade of Kansas City, Missouri, Inc. Clearing and transaction fees are generated through the trading of these products. These trading products, most of which have traded for decades, require authorization from the Commodity Futures Trading Commission (CFTC). Product authorizations from the CFTC have no term limits

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Accounts receivable, allowance	$ 3.6	$ 1.9
Restricted cash, current	29.5	32.0
Accumulated depreciation and amortization, property	577.4	788.6
Restricted cash, noncurrent	$ 64.4	$ 70.5
Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000	10,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series A Junior Participating Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	0	0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000	1,000,000
Common stock, shares issued (in shares)	337,978	336,938
Common stock, shares outstanding (in shares)	337,978	336,938
Class B Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3	3
Common stock, shares issued (in shares)	3	3
Common stock, shares outstanding (in shares)	3	3

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Clearing and transaction fees	$ 704.2	$ 715.0	$ 2,267.9	$ 2,105.0
Market data and information services	101.1	99.5	306.4	300.3
Access and communication fees	23.8	21.6	67.7	64.4
Other	12.6	14.2	40.3	43.3
Expenses	841.7	850.3	2,682.3	2,513.0
Expenses
Compensation and benefits	130.6	136.4	394.2	419.2
Communications	6.9	7.1	19.9	21.3
Technology support services	17.3	15.4	52.4	47.1
Professional fees and outside services	33.5	33.8	104.2	90.6
Amortization of purchased intangibles	24.0	24.9	72.0	74.8
Depreciation and amortization	31.2	32.4	95.5	97.5
Occupancy and building operations	19.6	23.1	65.3	69.4
Licensing and other fee agreements	31.5	33.1	103.3	92.5
Other	21.8	27.7	113.0	81.8
Total Expenses	316.4	333.9	1,019.8	994.2
Operating Income	525.3	516.4	1,662.5	1,518.8
Non-Operating Income (Expense)
Investment income	36.5	2.5	71.3	26.7
Gains (losses) on derivative investments	0.0	0.0	0.0	(1.8)
Interest and other borrowing costs	(31.1)	(28.3)	(91.9)	(88.5)
Equity in net earnings (losses) of unconsolidated subsidiaries	28.6	26.6	82.4	75.1
Other non-operating income (expense)	(10.5)	(0.8)	(30.9)	(42.0)
Total Non-Operating	23.5	0.0	30.9	(30.5)
Income before Income Taxes	548.8	516.4	1,693.4	1,488.3
Income tax provision	76.0	156.5	532.7	533.0
Net Income	$ 472.8	$ 359.9	$ 1,160.7	$ 955.3
Earnings per Common Share:
Basic (in dollars per share)	$ 1.40	$ 1.07	$ 3.44	$ 2.84
Diluted (in dollars per share)	$ 1.39	$ 1.06	$ 3.43	$ 2.83
Weighted Average Number of Common Shares:
Basic (in shares)	337,592	336,323	337,299	336,015
Diluted (in shares)	339,143	338,139	338,834	337,804

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 472.8	$ 359.9	$ 1,160.7	$ 955.3
Other comprehensive income (loss), net of tax:
Net unrealized holding gains (losses) arising during the period	(17.7)	(100.2)	177.7	(91.0)
Reclassification of net (gains) losses on sales included in investment income	6.3	(2.6)	6.3	3.4
Income tax benefit (expense)	(65.3)	0.0	(65.9)	1.2
Investment securities, net	(89.3)	(97.6)	105.5	(93.2)
Net change in defined benefit plans arising during the period	0.0	0.0	3.1	(0.3)
Amortization of net actuarial (gains) losses included in compensation and benefits expense	0.8	0.6	2.4	2.0
Income tax benefit (expense)	(0.3)	(0.2)	(2.1)	(0.6)
Defined benefit plans, net	0.5	0.4	3.4	1.1
Net unrealized holding gains (losses) arising during the period	0.0	0.0	0.0	(4.7)
Ineffectiveness on cash flow hedges included in (gains) losses on derivative investments	0.0	0.0	0.0	1.8
Amortization of effective portion of net (gains) losses on cash flow hedges included in interest expense	(0.3)	(0.3)	(0.9)	(0.9)
Income tax benefit (expense)	0.1	0.1	0.3	1.5
Derivative investments, net	(0.2)	(0.2)	(0.6)	(2.3)
Foreign currency translation adjustments	(0.6)	(3.4)	(5.6)	(10.0)
Income tax benefit (expense)	(0.8)	1.1	1.0	3.6
Foreign currency translation, net	(1.4)	(2.3)	(4.6)	(6.4)
Other comprehensive income (loss), net of tax	(90.4)	(99.7)	103.7	(100.8)
Comprehensive Income	$ 382.4	$ 260.2	$ 1,264.4	$ 854.5

Consolidated Statements Of Shareholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock And Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Class A Common Stock [Member]	Class A Common Stock [Member] Common Stock And Additional Paid-In Capital [Member]	Class B Common Stock [Member]	Class B Common Stock [Member] Common Stock And Additional Paid-In Capital [Member]
Balance (in shares) at Dec. 31, 2014						335,452		3
Balance at December 31, 2015 at Dec. 31, 2014	$ 20,923.5	$ 17,600.0	$ 3,317.3	$ 6.2
Net income	955.3		955.3
Other comprehensive income (loss), net of tax	(100.8)			(100.8)
Dividends on common stock of $1.80 per share	(500.8)		(500.8)
Adjustments to Additional Paid in Capital, Other	9.3	9.3
Exercise of stock options (in shares)						798
Exercise of stock options	51.8	51.8
Excess tax benefits from option exercises and restricted stock vesting	6.7	6.7
Vesting of issued restricted Class A common stock, in shares						450
Vesting of issued restricted Class A common stock	(16.8)	(16.8)
Shares issued to Board of Directors, in shares						26
Shares issued to Board of Directors	2.4	2.4
Shares issued under Employee Stock Purchase Plan, in shares						10
Shares issued under Employee Stock Purchase Plan	1.0	1.0
Stock-based compensation	45.2	45.2
Balance (in shares) at Sep. 30, 2015						336,736		3
Balance at September 30, 2016 at Sep. 30, 2015	21,376.8	17,699.6	3,771.8	(94.6)
Balance (in shares) at Dec. 31, 2015					336,938	336,938	3	3
Balance at December 31, 2015 at Dec. 31, 2015	20,551.8	17,725.0	2,907.6	(80.8)
Net income	1,160.7		1,160.7
Other comprehensive income (loss), net of tax	103.7			103.7
Dividends on common stock of $1.80 per share	(609.7)		(609.7)
Exercise of stock options (in shares)						434
Exercise of stock options	29.5	29.5
Excess tax benefits from option exercises and restricted stock vesting	10.0	10.0
Vesting of issued restricted Class A common stock, in shares						570
Vesting of issued restricted Class A common stock	(26.8)	(26.8)
Shares issued to Board of Directors, in shares						26
Shares issued to Board of Directors	2.5	2.5
Shares issued under Employee Stock Purchase Plan, in shares						10
Shares issued under Employee Stock Purchase Plan	0.9	0.9
Stock-based compensation	42.3	42.3
Balance (in shares) at Sep. 30, 2016					337,978	337,978	3	3
Balance at September 30, 2016 at Sep. 30, 2016	$ 21,264.9	$ 17,783.4	$ 3,458.6	$ 22.9

Consolidated Statements Of Shareholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock, per share (in dollars per share)	$ 1.80	$ 1.50

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities
Net income	$ 1,160.7	$ 955.3
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	42.3	45.2
Amortization of purchased intangibles	72.0	74.8
Depreciation and amortization	95.5	97.5
Gain on sale of BM&FBOVESPA shares	(6.4)	(3.4)
Debt prepayment costs	0.0	61.8
Loss on datacenter	27.1	0.0
Undistributed earnings, net of losses, of unconsolidated subsidiaries	(29.3)	(15.2)
Deferred income taxes	(79.3)	49.8
Change in:
Accounts receivable	(18.7)	(22.3)
Other current assets	(12.5)	12.4
Other assets	9.5	(18.4)
Accounts payable	5.7	1.3
Income taxes payable	21.3	(70.1)
Other current liabilities	(67.3)	(31.3)
Other liabilities	(14.3)	(0.5)
Other	(0.7)	4.3
Net Cash Provided by Operating Activities	1,205.6	1,141.2
Cash Flows from Investing Activities
Proceeds from maturities of available-for-sale marketable securities	40.1	29.3
Purchases of available-for-sale marketable securities	(44.9)	(29.3)
Purchases of available-for-sale marketable securities	(62.9)	(90.3)
Investments in business ventures	(4.9)	(7.0)
Proceeds from Sale of Other Assets, Investing Activities	8.8	0.0
Proceeds from sale of BM&FBOVESPA shares	0.0	69.0
Settlement of derivative related to debt issuance	0.0	7.0
Net Cash Used in Investing Activities	(63.8)	(21.3)
Cash Flows from Financing Activities
Proceeds from debt, net of issuance costs	0.0	743.7
Repayment of debt	0.0	(673.0)
Cash dividends	(1,584.3)	(1,174.9)
Proceeds from finance lease obligation	130.0	0.0
Proceeds from exercise of stock options	29.5	51.8
Excess tax benefits related to employee option exercises and restricted stock vesting	10.0	6.7
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0.0	(7.0)
Other	0.9	1.0
Net Cash Used in Financing Activities	(1,413.9)	(1,051.7)
Net change in cash and cash equivalents	(272.1)	68.2
Cash and cash equivalents, beginning of period	1,692.6	1,366.1
Cash and Cash Equivalents, End of Period	1,420.5	1,434.3
Supplemental Disclosure of Cash Flow Information
Income taxes paid	545.5	548.5
Interest paid	84.8	89.1
Accrued Proceeds from Sale of Investment	$ 20.8	$ 0.0

Basis Of Presentation	9 Months Ended
Basis Of Presentation	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Presentation	Basis of Presentation The consolidated financial statements consist of CME Group Inc. (CME Group) and its subsidiaries (collectively, the company), including Chicago Mercantile Exchange Inc. (CME), Board of Trade of the City of Chicago, Inc. (CBOT), New York Mercantile Exchange, Inc. (NYMEX), Commodity Exchange, Inc. (COMEX), CME Clearing Europe Limited (CMECE) and CME Europe Limited (CME Europe). CME, CBOT, NYMEX, COMEX, CMECE and CME Europe and their subsidiaries are referred to collectively as “the exchange” in the notes to the consolidated financial statements. The clearing houses include CME Clearing, which is the U.S. clearing house and a division of CME, and CMECE. The accompanying interim consolidated financial statements have been prepared by CME Group without audit. Certain notes and other information normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted. In the opinion of management, the accompanying consolidated financial statements include all normal recurring adjustments considered necessary to present fairly the financial position of the company at September 30, 2016 and December 31, 2015 and the results of operations and cash flows for the periods indicated. Quarterly results are not necessarily indicative of results for any subsequent period. The accompanying consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto in CME Group’s Annual Report on Form 10-K for the year ended December 31, 2015, filed with the Securities and Exchange Commission (SEC) on February 26, 2016.

Performance Bonds and Guaranty Fund Contributions (Notes)	9 Months Ended
	Sep. 30, 2016
Performance Bonds and Guaranty Fund Contributions [Abstract]
Performance Bonds and Guaranty Fund Contributions	Performance Bonds and Guaranty Fund Contributions Performance Bonds and Guaranty Fund Contributions. At September 30, 2016, performance bonds and guaranty fund contribution assets on the consolidated balance sheets include cash as well as U.S. Treasury securities and U.S. government agency securities with maturity dates of 90 days or less. U.S. Treasury securities and U.S. government agency securities are purchased by CME, at its discretion, using cash collateral. The benefits, including interest earned, and risks of ownership accrue to CME. Interest earned is included in investment income on the consolidated statements of income. These securities are classified as available-for-sale. At September 30, 2016, the amortized cost and fair value of the U.S. Treasury securities were $4,198.9 million and $4,199.5 million, respectively. At September 30, 2016, the amortized cost and fair value of the U.S. government securities were both $3,682.6 million. The U.S. Treasury securities and U.S. government agency securities will mature in the fourth quarter of 2016. Performance bonds and guaranty fund contribution assets also include overnight reverse repurchase agreements that were purchased by CME, at its discretion, using cash collateral. The fair value of the overnight securities under the reverse repurchase agreements was $1,052.7 million at September 30, 2016. CME has been designated as a systemically important financial market utility by the Financial Stability Oversight Council and is authorized to establish and maintain a cash account at the Federal Reserve Bank of Chicago. CME has received approval to establish this account at the Federal Reserve Bank of Chicago for clearing members' proprietary cash balances and is currently operationalizing the account, including testing. Clearing House Contract Settlement. CME Clearing and CMECE mark-to-market open positions for all futures and options contracts twice a day (once a day for CME's cleared-only credit default swap and interest rate swap contracts). Based on values derived from the mark-to-market process, CME Clearing and CMECE require payments from clearing firms whose positions have lost value and make payments to clearing firms whose positions have gained value. Under the extremely unlikely scenario of simultaneous default by every clearing firm who has open positions with unrealized losses, the maximum exposure related to positions other than cleared-only credit default and interest rate swap contracts would be one half day of changes in fair value of all open positions, before considering the clearing houses' ability to access defaulting clearing firms' collateral deposits. For CME's cleared-only credit default swap and interest rate swap contracts, the maximum exposure related to CME Clearing's guarantee would be one full day of changes in fair value of all open positions, before considering CME Clearing's ability to access defaulting clearing firms' collateral. During the first nine months of 2016, CME Clearing and CMECE transferred an average of approximately $3.3 billion a day through their clearing systems for settlement from clearing firms whose positions had lost value to clearing firms whose positions had gained value. CME Clearing and CMECE reduce their guarantee exposure through initial and maintenance performance bond requirements and mandatory guaranty fund contributions. The company believes that its guarantee liability is immaterial and therefore has not recorded any liability at September 30, 2016.

Property (Notes)

9 Months Ended

Sep. 30, 2016

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure

Property

In March 2016, the company sold its datacenter in the Chicago area for $130.0 million. At the time of the sale, the company leased back a portion of the property. The sale-leaseback transaction was recognized under the financing method and not as a sale-leaseback arrangement under generally accepted accounting principles due to the company's participation in future revenues and development work, which constitutes continuing involvement in the datacenter. Under the financing method, the assets remain on the consolidated balance sheet throughout the term of the lease and the proceeds of $130.0 million from the transaction are recognized as a finance lease obligation within other liabilities and other current liabilities in the consolidated balance sheet. A portion of the lease payments will be recognized as a reduction of the finance lease obligation and a portion will be recognized as interest expense based on an imputed interest rate.

The net cost basis of the property and equipment legally sold was $153.1 million at the date of the sale. At March 31, 2016, the company wrote down the property and equipment to a fair value of $130.0 million based on qualitative indications of impairment and a quantitative analysis based on undiscounted cash flows. The company recognized a net loss on the transaction of $27.1 million through other expenses, which includes the write down to fair value and certain other transaction-related costs. The company recognized a total net loss and expenses of $28.6 million, which also includes $1.5 million of legal and other fees incurred. The property and equipment legally sold will continue to be recognized on the consolidated balance sheets and will continue to be depreciated on the consolidated statements of income over the term of the lease.

The lease has an initial lease term ending in March 2031 and contains two consecutive renewal options for five years. Future minimum lease payments under this non-cancellable lease will be payable as follows as of September 30, 2016 (in millions):



Year
Remainder of 2016	$	4.2
2017	16.7
2018	16.8
2019	16.8
2020	16.9
Thereafter	180.5
Total	$	251.9

Intangible Assets And Goodwill

9 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets And Goodwill

Intangible Assets

Intangible assets consisted of the following at September 30, 2016 and December 31, 2015:



	September 30, 2016							December 31, 2015
(in millions)	Assigned Value		Accumulated Amortization			Net Book Value		Assigned Value		Accumulated Amortization			Net Book Value
Amortizable Intangible Assets:
Clearing firm, market data and other customer relationships	$	2,838.8	$	(825.5	)	$	2,013.3	$	2,838.8	$	(754.5	)	$	2,084.3
Technology-related intellectual property	29.4		(28.2		)	1.2		29.4		(27.2		)	2.2
Other	2.4		(1.0		)	1.4		2.4		(1.0		)	1.4
Total amortizable intangible assets	$	2,870.6	$	(854.7	)	2,015.9		$	2,870.6	$	(782.7	)	2,087.9

Indefinite-Lived Intangible Assets:
Trade names						450.0							450.0
Total intangible assets – other, net						$	2,465.9						$	2,537.9
Trading products ⁽¹⁾						$	17,175.3						$	17,175.3

(1)

Trading products represent futures and options products acquired in our business combinations with CBOT Holdings, Inc., NYMEX Holdings, Inc. and The Board of Trade of Kansas City, Missouri, Inc. Clearing and transaction fees are generated through the trading of these products. These trading products, most of which have traded for decades, require authorization from the Commodity Futures Trading Commission (CFTC). Product authorizations from the CFTC have no term limits.

Total amortization expense for intangible assets was $24.0 million and $24.9 million for the quarters ended September 30, 2016 and 2015, respectively. Total amortization expense for intangible assets was $72.0 million and $74.8 million for the nine months ended September 30, 2016 and 2015, respectively. As of September 30, 2016, the future estimated amortization expense related to amortizable intangible assets is expected to be as follows:



(in millions)	Amortization Expense
Remainder of 2016	$	24.0
2017	95.5
2018	94.7
2019	94.7
2020	94.7
2021	94.7
Thereafter	1,517.6

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Long-Term Investments (Notes)	9 Months Ended
Long-Term Investments (Notes)	Sep. 30, 2016
Investments, All Other Investments [Abstract]
Investment [Text Block]	Long-Term Investments In September 2016, the company sold approximately 4.0 million shares of BM&FBOVESPA S.A. (BM&FBOVESPA) and recognized a net gain of $6.4 million within investment income on the consolidated statements of income. As of September 30, 2016, the company owned an approximate 4% interest in BM&FBOVESPA. At September 30, 2016, the fair value and cost basis of the remaining investment in BM&FBOVESPA was $351.1 million and $243.9 million, respectively.

Debt

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Debt

In the first quarter of 2016, the company adopted the Financial Accounting Standards Board's (FASB) standards update on changes to the presentation of debt issuance costs. The update requires debt issuance costs related to a recognized debt liability to be presented as a deduction from the carrying value of the debt liability. Previously, debt issuance costs were recognized as deferred charges within other assets in the consolidated balance sheets. The standards update was applied on a retrospective basis, adjusting all prior periods presented, as if the new accounting methodology was in effect during those periods. At December 31, 2015, $12.1 million of debt issuance costs were reclassified in the consolidated balance sheet from other assets to long-term debt compared with what was previously reported. At September 30, 2016, $11.4 million of debt issuance costs were deducted from long-term debt. The change in accounting policy has been reflected in the table below.

Long-term debt consisted of the following at September 30, 2016 and December 31, 2015:



(in millions)	September 30, 2016		December 31, 2015
$750.0 million fixed rate notes due September 2022, stated rate of 3.00%⁽¹⁾	$	745.0	$	744.4
$750.0 million fixed rate notes due March 2025, stated rate of 3.00% ⁽²⁾	744.0		743.4
$750.0 million fixed rate notes due September 2043, stated rate of 5.30% ⁽³⁾	741.7		741.5
Total long-term debt	$	2,230.7	$	2,229.3


(1)	In August 2012, the company entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 3.32%.


(2)	In December 2014, the company entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 3.11%.


(3)	In August 2012, the company entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 4.73%.

Long-term debt maturities, at par value, were as follows at September 30, 2016:



(in millions)	Par Value
2017	$	—
2018	—
2019	—
2020	—
2021	—
Thereafter	2,250.0

Income Tax (Notes)	9 Months Ended
Income Tax (Notes)	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Tax Disclosure	Income Taxes In the first quarter of 2016, the company adopted the FASB's standards update that simplifies the classification of deferred tax assets and liabilities. The update eliminates the current requirement to present deferred tax assets and liabilities as current and non-current in a classified balance sheet. Instead, all deferred tax assets, along with valuation allowances, and deferred tax liabilities are required to be classified as non-current. Companies are still required to offset deferred tax assets and liabilities for each taxpaying component within a tax jurisdiction. Beginning in the first quarter of 2016, the company adopted this standards update on a prospective basis and classified all deferred tax assets and liabilities as non-current. Prior period deferred tax assets and liabilities were not retrospectively adjusted. A net current deferred tax asset of $27.9 million was included in other current assets at December 31, 2015. During the first quarter of 2016, net current deferred tax assets of $27.9 million were reclassified to net long-term liabilities. Total net current deferred tax assets are primarily attributable to stock-based compensation and accrued expenses. Net long-term deferred tax liabilities were $7.3 billion and $7.4 billion at September 30, 2016 and December 31, 2015. Net deferred tax liabilities are principally the result of purchase accounting for intangible assets in our various mergers, including CBOT Holdings, Inc. and NYMEX Holdings, Inc. Valuation allowances of $15.3 million and $122.3 million have been provided on deferred tax assets at September 30, 2016 and December 31, 2015, respectively. At September 30, 2016 and December 31, 2015, valuation allowances were related to certain domestic net operating losses, foreign net operating losses as well as built in capital losses for which we do not believe that we currently meet the more-likely-than-not-threshold for recognition. At September 30, 2016, the company released $106.3 million of valuation allowance on deferred tax assets relating to built-in losses on its investment in BM&FBOVESPA due to the implementation of a tax strategy to realize additional ordinary income tax losses on recent share sales and the remaining investment in BM&FBOVESPA.

Contingencies	9 Months Ended
Contingencies	Sep. 30, 2016
Loss Contingency [Abstract]
Contingencies	Contingencies Legal and Regulatory Matters. In 2013, the CFTC filed suit against NYMEX and two former employees alleging disclosure of confidential customer information in violation of the Commodity Exchange Act. NYMEX’s motion to dismiss was denied in 2014. Based on its investigation to date and advice from legal counsel, the company believes that it has strong factual and legal defenses to the claim. In the normal course of business, the company discusses matters with its regulators raised during regulatory examinations or otherwise subject to their inquiry and oversight. These matters could result in censures, fines, penalties or other sanctions. Management believes the outcome of any resulting actions will not have a material impact on its consolidated financial position or results of operations. However, the company is unable to predict the outcome or the timing of the ultimate resolution of these matters, or the potential fines, penalties or injunctive or other equitable relief, if any, that may result from these matters. In addition, the company is a defendant in, and has potential for, various other legal proceedings arising from its regular business activities. While the ultimate results of such proceedings against the company cannot be predicted with certainty, the company believes that the resolution of any of these matters on an individual or aggregate basis will not have a material impact on its consolidated financial position or results of operations. At December 31, 2015, the company had accrued $3.5 million for legal and regulatory matters that were probable and estimable. No accrual was required for legal and regulatory matters that were probable and estimable as of September 30, 2016. Intellectual Property Indemnifications. Certain agreements with customers and other third parties related to accessing the CME platforms, utilizing market data services and licensing CME SPAN software may contain indemnifications from intellectual property claims that may be made against them as a result of their use of the applicable products and/or services. The potential future claims relating to these indemnifications cannot be estimated and therefore no liability has been recorded.

- Definition

The entire disclosure for loss and gain contingencies. Describes any existing condition, situation, or set of circumstances involving uncertainty as of the balance sheet date (or prior to issuance of the financial statements) as to a probable or reasonably possible loss incurred by an entity that will ultimately be resolved when one or more future events occur or fail to occur, and typically discloses the amount of loss recorded or a range of possible loss, or an assertion that no reasonable estimate can be made.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14615-108349

+ Details

Guarantees	9 Months Ended
Guarantees	Sep. 30, 2016
Guarantees [Abstract]
Guarantees	Guarantees Mutual Offset Agreement. CME and Singapore Exchange Limited (SGX) have a mutual offset agreement with a current term through October 2017. This agreement enables market participants to open a futures position on one exchange and liquidate it on the other. The term of the agreement will automatically renew for a one-year period unless either party provides advance notice of their intent to terminate. CME must maintain U.S. Treasury securities or irrevocable, standby letters of credit as collateral for this agreement. At September 30, 2016, CME was contingently liable to SGX on letters of credit totaling $760.0 million. Regardless of the collateral, CME guarantees all cleared transactions submitted through SGX and would initiate procedures designed to satisfy these financial obligations in the event of a default, such as the use of performance bonds and guaranty fund contributions of the defaulting clearing firm. The company believes that its guarantee liability is immaterial and therefore has not recorded any liability at September 30, 2016. Family Farmer and Rancher Protection Fund. In 2012, the company established the Family Farmer and Rancher Protection Fund (the Fund). The Fund is designed to provide payments, up to certain maximum levels, to family farmers, ranchers and other agricultural industry participants who use the company's agricultural commodity products and who suffer losses to their segregated account balances due to their CME clearing member becoming insolvent. Under the terms of the Fund, farmers and ranchers are eligible for up to $25,000 per participant. Farming and ranching cooperatives are eligible for up to $100,000 per cooperative. The Fund was established with a maximum of $100.0 million available for distribution to participants. Since its establishment, the Fund has made payments of approximately $2.0 million, which leaves $98.0 million available for future claims. If, at any time, payments due to participants were to exceed the amount remaining in the fund, payments would be pro-rated. Clearing members and customers must register with the company in advance and provide certain documentation in order to substantiate their eligibility. The company believes that its guarantee liability is immaterial and therefore has not recorded any liability at September 30, 2016.

Accumulated Other Comprehensive Income (Notes)

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

The following tables present changes in the accumulated balances for each component of other comprehensive income (loss), including current period other comprehensive income (loss) and reclassifications out of accumulated other comprehensive income (loss):



(in millions)	Investment Securities			Defined Benefit Plans			Derivative Investments			Foreign Currency Translation			Total
Balance at December 31, 2015	$	(95.0	)	$	(36.6	)	$	59.6		$	(8.8	)	$	(80.8	)
Other comprehensive income (loss) before reclassifications and income tax benefit (expense)	177.7			3.1			—			(5.6		)	175.2
Amounts reclassified from accumulated other comprehensive income (loss)	(6.3		)	2.4			(0.9		)	—			(4.8		)
Income tax benefit (expense)	(65.9		)	(2.1		)	0.3			1.0			(66.7		)
Net current period other comprehensive income (loss)	105.5			3.4			(0.6		)	(4.6		)	103.7
Balance at September 30, 2016	$	10.5		$	(33.2	)	$	59.0		$	(13.4	)	$	22.9



(in millions)	Investment Securities			Defined Benefit Plans			Derivative Investments			Foreign Currency Translation			Total
Balance at December 31, 2014	$	(22.9	)	$	(31.3	)	$	62.6		$	(2.2	)	$	6.2
Other comprehensive income (loss) before reclassifications and income tax benefit (expense)	(91.0		)	(0.3		)	(4.7		)	(10.0		)	(106.0		)
Amounts reclassified from accumulated other comprehensive income (loss)	(3.4		)	2.0			0.9			—			(0.5		)
Income tax benefit (expense)	1.2			(0.6		)	1.5			3.6			5.7
Net current period other comprehensive income (loss)	(93.2		)	1.1			(2.3		)	(6.4		)	(100.8		)
Balance at September 30, 2015	$	(116.1	)	$	(30.2	)	$	60.3		$	(8.6	)	$	(94.6	)

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Subparagraph (SX 210.3-04)
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reclassification Adjustments
-URI http://asc.fasb.org/extlink&oid=6522872

+ Details

Fair Value Measurements

9 Months Ended

Sep. 30, 2016

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Fair Value Measurements

The company uses a three-level classification hierarchy of fair value measurements for disclosure purposes.


•	Level 1 inputs, which are considered the most reliable evidence of fair value, consist of quoted prices (unadjusted) for identical assets or liabilities in active markets.


•	Level 2 inputs consist of observable market data, such as quoted prices for similar assets and liabilities in active markets, or inputs other than quoted prices that are directly observable.


•	Level 3 inputs consist of unobservable inputs which are derived and cannot be corroborated by market data or other entity-specific inputs.

Level 1 assets generally include U.S. Treasury securities, U.S. government agency securities, investments in publicly traded mutual funds, equity securities and corporate debt securities with quoted market prices. In general, the company uses quoted prices in active markets for identical assets to determine the fair value of marketable securities and equity investments. If quoted prices are not available to determine fair value, the company uses other inputs that are directly observable.

Assets included in level 2 generally consist of asset-backed securities. Asset-backed securities were measured at fair value based on matrix pricing using prices of similar securities with similar inputs such as maturity dates, interest rates and credit ratings.

Financial assets recorded in the consolidated balance sheet as of September 30, 2016 were classified in their entirety based on the lowest level of input that was significant to each asset's fair value measurement. There were no liabilities that were measured at fair value as of September 30, 2016. The following tables present financial instruments measured at fair value on a recurring basis:



	September 30, 2016
(in millions)	Level 1		Level 2		Level 3		Total
Assets at Fair Value:
Marketable securities:
Corporate debt securities	$	22.0	$	—	$	—	$	22.0
Mutual funds	60.9		—		—		60.9
Equity securities	0.1		—		—		0.1
Asset-backed securities	—		0.3		—		0.3
Total Marketable Securities	83.0		0.3		—		83.3
Performance bonds and guaranty fund contributions ⁽¹⁾:
U.S. Treasury securities	4,199.5		—		—		4,199.5
U.S. government agencies securities	3,682.6		—		—		3,682.6
Equity investments	369.7		—		—		369.7
Total Assets at Fair Value	$	8,334.8	$	0.3	$	—	$	8,335.1

(1) Performance bonds and guaranty fund contributions on the consolidated balance sheet at September 30, 2016 include U.S. Treasury securities and U.S. government agency securities purchased with cash collateral.

There were no transfers of assets or liabilities between level 1, level 2 and level 3 during the first nine months of 2016. There were no level 3 assets valued at fair value on a recurring basis during the first nine months of 2016. The following is a reconciliation of level 3 liabilities valued at fair value on a recurring basis during the first nine months of 2016.



(in millions)	Contingent Consideration
Fair value of liability at December 31, 2015	$	0.3
Realized and unrealized (gains) losses:
Included in other expenses	(0.3		)
Fair value of liability at September 30, 2016	$	—

In the first quarter of 2016, the company sold a datacenter and leased back a portion of the property. Under generally accepted accounting principles, the transaction has been recognized under the financing method instead of recognized as a sale-leaseback arrangement. As a result, the property and equipment legally sold will continue to be recognized on the consolidated balance sheets and was written down to a fair value of $130.0 million at March 31, 2016. In the second and third quarters of 2016, the company also recorded impairment charges totaling $5.5 million on one of its strategic investments. The fair value of the investment was estimated to be zero at September 30, 2016. Both assessments were based on qualitative indications of impairment and a quantitative analysis of undiscounted cash flows. The fair values of the datacenter and strategic investment are considered level 3 and nonrecurring. There were no other level 3 assets or liabilities valued at fair value on a nonrecurring basis during the first nine months of 2016.

The following presents the estimated fair values of long-term debt notes, which are carried at amortized cost on the consolidated balance sheets. The fair values, which are classified as level 2 under the fair value hierarchy, were estimated using quoted market prices. At September 30, 2016, the fair values were as follows:



(in millions)	Fair Value
$750.0 million fixed rate notes due September 2022, stated rate of 3.00%	$	798.8
$750.0 million fixed rate notes due March 2025, stated rate of 3.00%	789.8
$750.0 million fixed rates notes due September 2043, stated rate of 5.30%	971.5

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Earnings Per Share

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Share

Basic earnings per share is computed by dividing net income attributable to the company by the weighted average number of shares of all classes of CME Group common stock outstanding for each reporting period. Diluted earnings per share reflects the increase in shares using the treasury stock method to reflect the impact of an equivalent number of shares of common stock if stock options were exercised and restricted stock awards were converted into common stock. Anti-dilutive stock options, restricted stock and performance share awards were as follows for the periods presented:



	Quarter Ended September 30,		Nine Months Ended September 30,
(in thousands)	2016	2015	2016	2015
Stock options	311	432	315	432
Restricted stock and performance shares	530	—	530	538
Total	841	432	845	970

The following table presents the earnings per share calculation for the periods presented:



	Quarter Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Net Income (in millions)	$	472.8	$	359.9	$	1,160.7	$	955.3
Weighted Average Number of Common Shares (in thousands):
Basic	337,592		336,323		337,299		336,015
Effect of stock options, restricted stock and performance shares	1,551		1,816		1,535		1,789
Diluted	339,143		338,139		338,834		337,804
Earnings per Common Share:
Basic	$	1.40	$	1.07	$	3.44	$	2.84
Diluted	1.39		1.06		3.43		2.83

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2016
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The company has evaluated subsequent events through the date the financial statements were issued and has determined that there are no subsequent events that require disclosure, except the following: In October 2016, the company sold approximately 24.0 million shares of BM&FBOVESPA and recognized a net gain of approximately $42.0 million within investment income on the consolidated statements of income during the fourth quarter. Following the sale, the company owned an approximate 2% interest in BM&FBOVESPA.

Property (Tables)

9 Months Ended

Sep. 30, 2016

Property, Plant and Equipment [Abstract]

Other Commitments

Future minimum lease payments under this non-cancellable lease will be payable as follows as of September 30, 2016 (in millions):



Year
Remainder of 2016	$	4.2
2017	16.7
2018	16.8
2019	16.8
2020	16.9
Thereafter	180.5
Total	$	251.9

Intangible Assets And Goodwill (Tables)

9 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Components of intangible assets

Intangible assets consisted of the following at September 30, 2016 and December 31, 2015:



	September 30, 2016							December 31, 2015
(in millions)	Assigned Value		Accumulated Amortization			Net Book Value		Assigned Value		Accumulated Amortization			Net Book Value
Amortizable Intangible Assets:
Clearing firm, market data and other customer relationships	$	2,838.8	$	(825.5	)	$	2,013.3	$	2,838.8	$	(754.5	)	$	2,084.3
Technology-related intellectual property	29.4		(28.2		)	1.2		29.4		(27.2		)	2.2
Other	2.4		(1.0		)	1.4		2.4		(1.0		)	1.4
Total amortizable intangible assets	$	2,870.6	$	(854.7	)	2,015.9		$	2,870.6	$	(782.7	)	2,087.9

Indefinite-Lived Intangible Assets:
Trade names						450.0							450.0
Total intangible assets – other, net						$	2,465.9						$	2,537.9
Trading products ⁽¹⁾						$	17,175.3						$	17,175.3

(1)

Future estimated amortization expense

As of September 30, 2016, the future estimated amortization expense related to amortizable intangible assets is expected to be as follows:



(in millions)	Amortization Expense
Remainder of 2016	$	24.0
2017	95.5
2018	94.7
2019	94.7
2020	94.7
2021	94.7
Thereafter	1,517.6

Debt (Tables)

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Schedule Of Short-Term And Long-Term Debt

Long-term debt consisted of the following at September 30, 2016 and December 31, 2015:



(in millions)	September 30, 2016		December 31, 2015
$750.0 million fixed rate notes due September 2022, stated rate of 3.00%⁽¹⁾	$	745.0	$	744.4
$750.0 million fixed rate notes due March 2025, stated rate of 3.00% ⁽²⁾	744.0		743.4
$750.0 million fixed rate notes due September 2043, stated rate of 5.30% ⁽³⁾	741.7		741.5
Total long-term debt	$	2,230.7	$	2,229.3


(1)	In August 2012, the company entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 3.32%.


(2)	In December 2014, the company entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 3.11%.


(3)	In August 2012, the company entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 4.73%.

Long-term debt maturities at par value

Long-term debt maturities, at par value, were as follows at September 30, 2016:



(in millions)	Par Value
2017	$	—
2018	—
2019	—
2020	—
2021	—
Thereafter	2,250.0

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.22)
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

+ Details

Accumulated Other Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)



(in millions)	Investment Securities			Defined Benefit Plans			Derivative Investments			Foreign Currency Translation			Total
Balance at December 31, 2015	$	(95.0	)	$	(36.6	)	$	59.6		$	(8.8	)	$	(80.8	)
Other comprehensive income (loss) before reclassifications and income tax benefit (expense)	177.7			3.1			—			(5.6		)	175.2
Amounts reclassified from accumulated other comprehensive income (loss)	(6.3		)	2.4			(0.9		)	—			(4.8		)
Income tax benefit (expense)	(65.9		)	(2.1		)	0.3			1.0			(66.7		)
Net current period other comprehensive income (loss)	105.5			3.4			(0.6		)	(4.6		)	103.7
Balance at September 30, 2016	$	10.5		$	(33.2	)	$	59.0		$	(13.4	)	$	22.9



(in millions)	Investment Securities			Defined Benefit Plans			Derivative Investments			Foreign Currency Translation			Total
Balance at December 31, 2014	$	(22.9	)	$	(31.3	)	$	62.6		$	(2.2	)	$	6.2
Other comprehensive income (loss) before reclassifications and income tax benefit (expense)	(91.0		)	(0.3		)	(4.7		)	(10.0		)	(106.0		)
Amounts reclassified from accumulated other comprehensive income (loss)	(3.4		)	2.0			0.9			—			(0.5		)
Income tax benefit (expense)	1.2			(0.6		)	1.5			3.6			5.7
Net current period other comprehensive income (loss)	(93.2		)	1.1			(2.3		)	(6.4		)	(100.8		)
Balance at September 30, 2015	$	(116.1	)	$	(30.2	)	$	60.3		$	(8.6	)	$	(94.6	)

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Financial instruments measured at fair value on a recurring basis

The following tables present financial instruments measured at fair value on a recurring basis:



	September 30, 2016
(in millions)	Level 1		Level 2		Level 3		Total
Assets at Fair Value:
Marketable securities:
Corporate debt securities	$	22.0	$	—	$	—	$	22.0
Mutual funds	60.9		—		—		60.9
Equity securities	0.1		—		—		0.1
Asset-backed securities	—		0.3		—		0.3
Total Marketable Securities	83.0		0.3		—		83.3
Performance bonds and guaranty fund contributions ⁽¹⁾:
U.S. Treasury securities	4,199.5		—		—		4,199.5
U.S. government agencies securities	3,682.6		—		—		3,682.6
Equity investments	369.7		—		—		369.7
Total Assets at Fair Value	$	8,334.8	$	0.3	$	—	$	8,335.1

Reconciliation of assets and liabilities valued at fair value on a recurring basis using significant unobservable inputs (level 3)

The following is a reconciliation of level 3 liabilities valued at fair value on a recurring basis during the first nine months of 2016.



(in millions)	Contingent Consideration
Fair value of liability at December 31, 2015	$	0.3
Realized and unrealized (gains) losses:
Included in other expenses	(0.3		)
Fair value of liability at September 30, 2016	$	—

Fair value of Debt Instruments

At September 30, 2016, the fair values were as follows:



(in millions)	Fair Value
$750.0 million fixed rate notes due September 2022, stated rate of 3.00%	$	798.8
$750.0 million fixed rate notes due March 2025, stated rate of 3.00%	789.8
$750.0 million fixed rates notes due September 2043, stated rate of 5.30%	971.5

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Anti-dilutive stock options, restricted stock and performance share awards were as follows for the periods presented:



	Quarter Ended September 30,		Nine Months Ended September 30,
(in thousands)	2016	2015	2016	2015
Stock options	311	432	315	432
Restricted stock and performance shares	530	—	530	538
Total	841	432	845	970

Basic And Diluted Earnings Per Share

The following table presents the earnings per share calculation for the periods presented:



	Quarter Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Net Income (in millions)	$	472.8	$	359.9	$	1,160.7	$	955.3
Weighted Average Number of Common Shares (in thousands):
Basic	337,592		336,323		337,299		336,015
Effect of stock options, restricted stock and performance shares	1,551		1,816		1,535		1,789
Diluted	339,143		338,139		338,834		337,804
Earnings per Common Share:
Basic	$	1.40	$	1.07	$	3.44	$	2.84
Diluted	1.39		1.06		3.43		2.83

Performance Bonds and Guaranty Fund Contributions (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
Guarantor Obligations [Line Items]
Average Daily Clearing Settlement	$ 3,300.0
US Treasury Securities [Member]
Guarantor Obligations [Line Items]
Available-for-sale Securities, Amortized Cost Basis	4,198.9
Available-for-sale Securities at Fair Value	4,199.5
US Government Agencies Debt Securities [Member]
Guarantor Obligations [Line Items]
Available-for-sale Securities, Amortized Cost Basis	3,682.6
Available-for-sale Securities at Fair Value	3,682.6
Repurchase Agreements [Member]
Guarantor Obligations [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	$ 1,052.7

Property (Details) $ in Millions	Sep. 30, 2016 USD ($)
Property, Plant and Equipment [Abstract]
Remainder of 2016	$ 4.2
2017	16.7
2018	16.8
2019	16.8
2020	16.9
Thereafter	180.5
Other Commitment	$ 251.9

Property Details (Details) - USD ($) $ in Millions	9 Months Ended
Property Details (Details) - USD ($) $ in Millions	Sep. 30, 2016	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Proceeds from Sale of Buildings	$ 130.0
Impaired Assets to be Disposed of by Method Other than Sale, Carrying Value of Asset	153.1
Property, Plant, and Equipment, Fair Value Disclosure	130.0	$ 130.0
Impairment of Real Estate	27.1
Total Cost of Transaction	28.6
Legal Fees for Sale-Leaseback	$ 1.5

Intangible Assets And Goodwill (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of purchased intangibles	$ 24.0	$ 24.9	$ 72.0	$ 74.8

Intangible Assets And Goodwill (Components Of Intangible Assets) (Details) - USD ($)
$ in Millions

Sep. 30, 2016

Dec. 31, 2015

Finite-Lived Intangible Assets [Line Items]

Indefinite-lived Intangible Assets

$ 2,465.9

$ 2,537.9

Other Indefinite-lived Intangible Assets

^[1]

17,175.3

Trade Names [Member]

Finite-Lived Intangible Assets [Line Items]

Indefinite-lived Intangible Assets

450.0

Clearing Firm, Market Data And Other Customer Relationships [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Assets, Gross

2,838.8

Accumulated amortization

(825.5)

(754.5)

Net book value

2,013.3

2,084.3

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Assets, Gross

29.4

Accumulated amortization

(28.2)

(27.2)

Net book value

1.2

2.2

Other Intangible Assets [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Assets, Gross

2.4

Accumulated amortization

(1.0)

Net book value

1.4

Total Amortizable Intangible Assets [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Assets, Gross

2,870.6

Accumulated amortization

(854.7)

(782.7)

Net book value

$ 2,015.9

$ 2,087.9

[1]

Intangible Assets And Goodwill (Future Estimated Amortization Expense) (Details) $ in Millions	Sep. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2016	$ 24.0
2017	95.5
2018	94.7
2019	94.7
2020	94.7
2021	94.7
Thereafter	$ 1,517.6

Long-Term Investments (Details) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($) shares
Investments, All Other Investments [Abstract]
Investment shares sold \| shares	4.0
Gain on Sale of Investments	$ 6.4
Sale of Stock, Percentage of Ownership after Transaction	4.00%
Investment Owned, at Fair Value	$ 351.1
Investment Owned, at Cost	$ 243.9

Debt (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Unamortized Debt Issuance Expense	$ 11.4	$ 12.1

Debt (Schedule Of Short-Term And Long-Term Debt) (Details) - USD ($) $ in Millions	1 Months Ended			9 Months Ended
	Mar. 31, 2015	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term debt				$ 2,230.7	$ 2,229.3
Forward starting interest rate swap agreement fixed rate	3.11%	4.73%	3.32%
$750.0 million fixed rate notes due September 2022, stated rate of 3.00% [Member]
Debt Instrument [Line Items]
Long-term debt				745.0	744.4
Debt Instrument, Face Amount				$ 750.0
Debt Instrument, Maturity Date				Sep. 01, 2022
Debt Instrument, Interest Rate, Stated Percentage				3.00%
$750.0 million fixed rate notes due March 2025, stated rate of 3.00% [Member]
Debt Instrument [Line Items]
Long-term debt				$ 744.0	743.4
Debt Instrument, Face Amount				$ 750.0
Debt Instrument, Maturity Date				Mar. 01, 2025
Debt Instrument, Interest Rate, Stated Percentage				3.00%
$750.0 million fixed rate notes due September 2043, stated rate of 5.30% [Member]
Debt Instrument [Line Items]
Long-term debt				$ 741.7	$ 741.5
Debt Instrument, Face Amount				$ 750.0
Debt Instrument, Maturity Date				Sep. 01, 2043
Debt Instrument, Interest Rate, Stated Percentage				5.30%

Debt (Schedule Of Maturities Of Long-Term Debt) (Details) $ in Millions	Sep. 30, 2016 USD ($)
Debt Disclosure [Abstract]
2017	$ 0.0
2018	0.0
2019	0.0
2020	0.0
2021	0.0
Thereafter	$ 2,250.0

Income Tax (Details) - USD ($) $ in Millions	9 Months Ended
Income Tax (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Gross, Current	$ 27.9	$ 27.9
Deferred income tax liabilities, net	7,317.7	7,358.3
Deferred Tax Assets, Valuation Allowance, Noncurrent	15.3	$ 122.3
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 106.3

Contingencies (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Loss Contingency [Abstract]
Accrued liability related to all outstanding legal matters	$ 0.0	$ 3.5

Guarantees (Details)	9 Months Ended
Guarantees (Details)	Sep. 30, 2016 USD ($) years
Guarantor Obligations [Line Items]
Agreement automatic renewal period (in years) \| years	1
Contingent liability to SGX, amount of irrevocable letters of credit	$ 760,000,000
Family Farmer and Ranchers Protection Fund [Member]
Guarantor Obligations [Line Items]
Payment per participant	25,000
Payment per cooperative	100,000
FutureLosses	100,000,000
Payments under Guarantee	2,000,000
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 98,000,000

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Balance at December 31, 2015			$ 20,551.8	$ 20,923.5
Other comprehensive income (loss), net of tax	$ (90.4)	$ (99.7)	103.7	(100.8)
Balance at September 30, 2016	21,264.9	21,376.8	21,264.9	21,376.8
Accumulated Other Comprehensive Income (Loss) [Member]
Balance at December 31, 2015			(80.8)	6.2
Comprehensive Income Before Reclassification Adjustments			175.2	(106.0)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			(4.8)	(0.5)
Other Comprehensive Income (Loss), Net of Tax			(66.7)	5.7
Other comprehensive income (loss), net of tax			103.7	(100.8)
Balance at September 30, 2016	22.9	(94.6)	22.9	(94.6)
Foreign Currency Translation [Member]
Balance at December 31, 2015			(8.8)	(2.2)
Comprehensive Income Before Reclassification Adjustments			(5.6)	(10.0)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			0.0	0.0
Other Comprehensive Income (Loss), Net of Tax			1.0	3.6
Other comprehensive income (loss), net of tax			(4.6)	(6.4)
Balance at September 30, 2016	(13.4)	(8.6)	(13.4)	(8.6)
Derivative Investments [Member]
Balance at December 31, 2015			59.6	62.6
Comprehensive Income Before Reclassification Adjustments			0.0	(4.7)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			(0.9)	0.9
Other Comprehensive Income (Loss), Net of Tax			0.3	1.5
Other comprehensive income (loss), net of tax			(0.6)	(2.3)
Balance at September 30, 2016	59.0	60.3	59.0	60.3
Defined Benefit Plans [Member]
Balance at December 31, 2015			(36.6)	(31.3)
Comprehensive Income Before Reclassification Adjustments			3.1	(0.3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			2.4	2.0
Other Comprehensive Income (Loss), Net of Tax			(2.1)	(0.6)
Other comprehensive income (loss), net of tax			3.4	1.1
Balance at September 30, 2016	(33.2)	(30.2)	(33.2)	(30.2)
Investment Securities [Member]
Balance at December 31, 2015			(95.0)	(22.9)
Comprehensive Income Before Reclassification Adjustments			177.7	(91.0)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			(6.3)	(3.4)
Other Comprehensive Income (Loss), Net of Tax			(65.9)	1.2
Other comprehensive income (loss), net of tax			105.5	(93.2)
Balance at September 30, 2016	$ 10.5	$ (116.1)	$ 10.5	$ (116.1)

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Mar. 31, 2016
Debt Disclosure [Abstract]
Property, Plant, and Equipment, Fair Value Disclosure	$ 130.0	$ 130.0
Other than Temporary Impairment Losses, Investments	$ 5.5

Fair Value Measurements (Financial Instruments Measured At Fair Value On A Recurring Basis) (Details) $ in Millions	Sep. 30, 2016 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Owned, at Fair Value	$ 351.1
Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	83.3
Performance bond reinvestment U.S. Treasuries	4,199.5
Performance bond reinvestment U.S. Agency Securities	3,682.6
Investment Owned, at Fair Value	369.7
Total Assets at Fair Value	8,335.1
Fair Value, Measurements, Recurring [Member] \| Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	22.0
Fair Value, Measurements, Recurring [Member] \| Exchange Traded Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	60.9
Fair Value, Measurements, Recurring [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.1
Fair Value, Measurements, Recurring [Member] \| Asset Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.3
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	83.0
Performance bond reinvestment U.S. Treasuries	4,199.5
Performance bond reinvestment U.S. Agency Securities	3,682.6
Investment Owned, at Fair Value	369.7
Total Assets at Fair Value	8,334.8
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	22.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange Traded Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	60.9
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.1
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Asset Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.3
Performance bond reinvestment U.S. Treasuries	0.0
Performance bond reinvestment U.S. Agency Securities	0.0
Investment Owned, at Fair Value	0.0
Total Assets at Fair Value	0.3
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange Traded Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	0.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Asset Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.3
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.0
Performance bond reinvestment U.S. Treasuries	0.0
Performance bond reinvestment U.S. Agency Securities	0.0
Investment Owned, at Fair Value	0.0
Total Assets at Fair Value	0.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange Traded Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	0.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	0.0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Asset Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	$ 0.0

Fair Value Measurements (Reconciliation Using Significant Unobservable Inputs) (Details) - Fair Value, Measurements, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of liability, beginning balance	$ 0.3
Included in other expenses	(0.3)
Fair value of liability, ending balance	$ 0.0

Fair Value Measurements (Estimated Fair Values of Long-Term Debt) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
$750.0 million fixed rate notes due September 2022, stated rate of 3.00% [Member]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Sep. 01, 2022
Debt Instrument, Interest Rate, Stated Percentage	3.00%
$750.0 million fixed rate notes due March 2025, stated rate of 3.00% [Member]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Mar. 01, 2025
Debt Instrument, Interest Rate, Stated Percentage	3.00%
$750.0 million fixed rate notes due September 2043, stated rate of 5.30% [Member]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Sep. 01, 2043
Debt Instrument, Interest Rate, Stated Percentage	5.30%
Fair Value, Inputs, Level 2 [Member] \| $750.0 million fixed rate notes due September 2022, stated rate of 3.00% [Member]
Debt Instrument, Fair Value Disclosure	$ 798.8
Fair Value, Inputs, Level 2 [Member] \| $750.0 million fixed rate notes due March 2025, stated rate of 3.00% [Member]
Debt Instrument, Fair Value Disclosure	789.8
Fair Value, Inputs, Level 2 [Member] \| $750.0 million fixed rate notes due September 2043, stated rate of 5.30% [Member]
Debt Instrument, Fair Value Disclosure	$ 971.5

Earnings Per Share (Narrative) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	841	432	845	970
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	311	432	315	432
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	530	0	530	538

Earnings Per Share (Net Income Attributable To CME Group) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income	$ 472.8	$ 359.9	$ 1,160.7	$ 955.3
Basic (in shares)	337,592	336,323	337,299	336,015
Dilutive Securities, Effect on EPS	1,551	1,816	1,535	1,789
Diluted (in shares)	339,143	338,139	338,834	337,804
Earnings per common share, basic (in dollars per share)	$ 1.40	$ 1.07	$ 3.44	$ 2.84
Earnings per common share, diluted (in dollars per share)	$ 1.39	$ 1.06	$ 3.43	$ 2.83

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

Subsequent Events (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2016	Sep. 30, 2016
Subsequent Event [Line Items]
Investment shares sold		4.0
Gain on Sale of Investments		$ 6.4
Sale of Stock, Percentage of Ownership after Transaction		4.00%
Subsequent Event [Member]
Subsequent Event [Line Items]
Investment shares sold	24.0
Gain on Sale of Investments	$ 42.0
Sale of Stock, Percentage of Ownership after Transaction	2.00%