10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

_________________________________________________________

FORM 10-Q

_________________________________________________________

(Mark One)

ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2015

- OR -

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                to                

Commission file number 001-31553

CME GROUP INC.

(Exact name of registrant as specified in its charter)

Delaware	36-4459170
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
20 South Wacker Drive, Chicago, Illinois	60606
(Address of principal executive offices)	(Zip Code)

(312) 930-1000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.            Yes  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).                                                    Yes  ý    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  x	Accelerated filer     o
Non-accelerated filer    o (Do not check if a smaller reporting company)	Smaller reporting company o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    

Yes  ¨    No  ý

The number of shares outstanding of each of the registrant’s classes of common stock as of July 15, 2015 was as follows: 337,756,060 shares of Class A common stock, $0.01 par value; 625 shares of Class B-1 common stock, $0.01 par value; 813 shares of Class B-2 common stock, $0.01 par value; 1,287 shares of Class B-3 common stock, $0.01 par value; and 413 shares of Class B-4 common stock, $0.01 par value.

1

CME GROUP INC.

FORM 10-Q

INDEX

		Page
PART I. FINANCIAL INFORMATION		3
Item 1.	Financial Statements	5
	Consolidated Balance Sheets at June 30, 2015 and December 31, 2014	5
	Consolidated Statements of Income for the Quarters and Six Months Ended June 30, 2015 and 2014	6
	Consolidated Statements of Comprehensive Income for the Quarters and Six Months Ended June 30, 2015 and 2014	7
	Consolidated Statements of Equity for the Six Months Ended June 30, 2015 and 2014	8
	Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2015 and 2014	10
	Notes to Unaudited Consolidated Financial Statements	11
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	18
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	27
Item 4.	Controls and Procedures	27
PART II. OTHER INFORMATION		28
Item 1.	Legal Proceedings	28
Item 1A.	Risk Factors	28
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	28
Item 4.	Mine Safety Disclosures	28
Item 6.	Exhibits	29
SIGNATURES		30

2

PART I. FINANCIAL INFORMATION

Certain Terms

Unless otherwise indicated, references to CME Group Inc. (CME Group or the company) products include references to products listed on one of its regulated exchanges or clearing houses: 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). The products listed are subject to the rules and regulations of the particular entity and the applicable rulebook should be consulted. Unless otherwise indicated, references to NYMEX include its subsidiary, COMEX. The clearing houses include CME Clearing, which is our U.S. clearing house and a division of CME, and CMECE. In addition, CME serves as a swap execution facility, which is a regulated platform for swap trading, and serves as a swap data repository, which provides public data on swap transactions and stores confidential swap data for regulatory purposes.

All references to “options” or “options contracts” in the text of this document refer to options on futures contracts.

Further information about CME Group and its products can be found at http://www.cmegroup.com. Information made available on our website does not constitute a part of this Quarterly Report on Form 10-Q.

Information about Contract Volume and Average Rate per Contract

All amounts regarding contract volume and average rate per contract exclude our credit default swaps and interest rate swaps contracts.

Trademark Information

CME Group is a trademark of CME Group Inc. The Globe logo, CME, Chicago Mercantile Exchange, Globex and E-mini are trademarks of Chicago Mercantile Exchange Inc. CBOT and Chicago Board of Trade are trademarks of Board of Trade of the City of Chicago, Inc. NYMEX, New York Mercantile Exchange and ClearPort are trademarks of New York Mercantile Exchange, Inc. COMEX is a trademark of Commodity Exchange, Inc. KCBT and Kansas City Board of Trade are trademarks of The Board of Trade of Kansas City, Missouri, Inc. Dow Jones, Dow Jones Industrial Average, S&P 500 and S&P are service and/or trademarks of Dow Jones Trademark Holdings LLC, Standard & Poor's Financial Services LLC and S&P/Dow Jones Indices LLC, as the case may be, and have been licensed for use by Chicago Mercantile Exchange Inc. All other trademarks are the property of their respective owners.

Forward-Looking Statements

From time to time, in this Quarterly Report on Form 10-Q as well as in other written reports and verbal statements, we discuss our expectations regarding future performance. These forward-looking statements are identified by their use of terms and phrases such as “believe,” “anticipate,” “could,” “estimate,” “intend,” “may,” “plan,” “expect” and similar expressions, including references to assumptions. These forward-looking statements are based on currently available competitive, financial and economic data, current expectations, estimates, forecasts and projections about the industries in which we operate and management's beliefs and assumptions. These statements are not guarantees of future performance and involve risks, uncertainties and assumptions that are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or implied in any forward-looking statements. We want to caution you not to place undue reliance on any forward-looking statements. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise. Among the factors that might affect our performance are:

• increasing competition by foreign and domestic entities, including increased competition from new entrants into our markets and consolidation of existing entities;

• our ability to keep pace with rapid technological developments, including our ability to complete the development, implementation and maintenance of the enhanced functionality required by our customers while maintaining reliability and ensuring that such technology is not vulnerable to security risks;

• our ability to continue introducing competitive new products and services on a timely, cost-effective basis, including through our electronic trading capabilities, and our ability to maintain the competitiveness of our existing products and services, including our ability to provide effective services to the swaps market;

• our ability to adjust our fixed costs and expenses if our revenues decline;

• our ability to maintain existing customers, develop strategic relationships and attract new customers;

• our ability to expand and offer our products outside the United States;

• changes in domestic and non-U.S. regulations, including the impact of any changes in domestic and non-U.S. laws or government policy with respect to our industry, such as any changes to regulations and policies that require increased financial and operational resources from us or our customers;

3

• the costs associated with protecting our intellectual property rights and our ability to operate our business without violating the intellectual property rights of others;

• decreases in revenue from our market data as a result of decreased demand;

• changes in our rate per contract due to shifts in the mix of the products traded, the trading venue and the mix of customers (whether the customer receives member or non-member fees or participates in one of our various incentive programs) and the impact of our tiered pricing structure;

• the ability of our financial safeguards package to adequately protect us from the credit risks of clearing members;

• the ability of our compliance and risk management methods to effectively monitor and manage our risks, including our ability to prevent errors and misconduct and protect our infrastructure against security breaches and misappropriation of our intellectual property assets;

• changes in price levels and volatility in the derivatives markets and in underlying equity, foreign exchange, interest rate and commodities markets;

• economic, political and market conditions, including the volatility of the capital and credit markets and the impact of economic conditions on the trading activity of our current and potential customers;

• our ability to accommodate increases in contract volume and order transaction traffic and to implement enhancements without failure or degradation of the performance of our trading and clearing systems;

• our ability to execute our growth strategy and maintain our growth effectively;

• our ability to manage the risks and control the costs associated with our strategy for acquisitions, investments and alliances;

• our ability to continue to generate funds and/or manage our indebtedness to allow us to continue to invest in our business;

• industry and customer consolidation;

• decreases in trading and clearing activity;

• the imposition of a transaction tax or user fee on futures and options on futures transactions and/or repeal of the 60/40 tax treatment of such transactions;

• the unfavorable resolution of material legal proceedings; and

• the seasonality of the futures business.

For a detailed discussion of these and other factors that might affect our performance, see Item 1A. of our Annual Report on Form 10-K, filed with the Securities and Exchange Commission on February 26, 2015 and Item 1A. of this Quarterly Report on Form 10-Q.

4

ITEM 1. FINANCIAL STATEMENTS

CME GROUP INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(dollars in millions, except par value data; shares in thousands)

(unaudited)

	June 30, 2015		December 31, 2014
Assets
Current Assets:
Cash and cash equivalents	$	1,151.0	$	1,366.1
Marketable securities	76.3		74.7
Accounts receivable, net of allowance of $0.9 and $1.2	399.9		341.2
Other current assets (includes $32.0 and $37.0 in restricted cash)	260.0		196.5
Performance bonds and guaranty fund contributions	42,167.9		40,566.8
Total current assets	44,055.1		42,545.3
Property, net of accumulated depreciation and amortization of $781.5 and $741.0	499.2		508.9
Intangible assets—trading products	17,175.3		17,175.3
Intangible assets—other, net	2,587.6		2,637.4
Goodwill	7,569.0		7,569.0
Other assets (includes $73.5 and $72.4 in restricted cash)	1,776.9		1,805.6
Total Assets	$	73,663.1	$	72,241.5
Liabilities and Equity
Current Liabilities:
Accounts payable	$	22.1	$	36.9
Other current liabilities	242.6		927.5
Performance bonds and guaranty fund contributions	42,167.9		40,566.8
Total current liabilities	42,432.6		41,531.2
Long-term debt	2,241.0		2,107.9
Deferred income tax liabilities, net	7,339.8		7,302.7
Other liabilities	390.9		376.2
Total Liabilities	52,404.3		51,318.0
CME Group Shareholders’ Equity:
Preferred stock, $0.01 par value, 10,000 shares authorized at June 30, 2015 and December 31, 2014; none issued	—		—
Class A common stock, $0.01 par value, 1,000,000 shares authorized at June 30, 2015 and December 31, 2014; 336,186 and 335,452 shares issued and outstanding as of June 30, 2015 and December 31, 2014, respectively	3.4		3.4
Class B common stock, $0.01 par value, 3 shares authorized, issued and outstanding as of June 30, 2015 and December 31, 2014	—		—
Additional paid-in capital	17,674.8		17,596.6
Retained earnings	3,575.5		3,317.3
Accumulated other comprehensive income (loss)	5.1		6.2
Total CME Group shareholders’ equity	21,258.8		20,923.5
Total Liabilities and Equity	$	73,663.1	$	72,241.5

See accompanying notes to unaudited consolidated financial statements.

5

CME GROUP INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

(dollars in millions, except per share data; shares in thousands)

(unaudited)

	Quarter Ended						Six Months Ended
	June 30,						June 30,
	2015			2014			2015			2014
Revenues
Clearing and transaction fees	$	681.8		$	609.3		$	1,390.0		$	1,261.5
Market data and information services	102.8			89.6			200.8			179.0
Access and communication fees	21.5			20.4			42.8			40.8
Other	13.9			12.3			29.1			27.7
Total Revenues	820.0			731.6			1,662.7			1,509.0
Expenses
Compensation and benefits	141.5			139.7			282.8			275.2
Communications	6.6			8.3			14.2			16.5
Technology support services	16.1			14.6			31.7			28.5
Professional fees and outside services	27.7			37.5			56.8			67.1
Amortization of purchased intangibles	25.0			25.2			49.9			50.4
Depreciation and amortization	33.3			34.3			65.1			68.4
Occupancy and building operations	23.5			23.2			46.3			46.4
Licensing and other fee agreements	28.8			25.7			59.4			54.7
Other	22.4			11.1			54.1			35.3
Total Expenses	324.9			319.6			660.3			642.5
Operating Income	495.1			412.0			1,002.4			866.5
Non-Operating Income (Expense)
Investment income	18.5			15.1			24.2			18.3
Gains (losses) on derivative investments	—			—			(1.8		)	—
Interest and other borrowing costs	(28.6		)	(28.3		)	(60.2		)	(62.0		)
Equity in net earnings (losses) of unconsolidated subsidiaries	26.0			21.5			48.5			43.9
Other non-operating income (expense)	(62.9		)	1.8			(41.2		)	1.8
Total Non-Operating	(47.0		)	10.1			(30.5		)	2.0
Income before Income Taxes	448.1			422.1			971.9			868.5
Income tax provision	183.1			158.3			376.5			338.1
Net Income	265.0			263.8			595.4			530.4
Less: net income (loss) attributable to non-controlling interest	—			—			—			(0.2		)
Net Income Attributable to CME Group	$	265.0		$	263.8		$	595.4		$	530.6
Earnings per Common Share Attributable to CME Group:
Basic	$	0.79		$	0.79		$	1.77		$	1.59
Diluted	0.78			0.79			1.76			1.58
Weighted Average Number of Common Shares:
Basic	336,036			334,097			335,859			334,002
Diluted	337,796			335,800			337,574			335,705

See accompanying notes to unaudited consolidated financial statements.

6

CME GROUP INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in millions)

(unaudited)

	Quarter Ended						Six Months Ended
	June 30,						June 30,
	2015			2014			2015			2014
Net income	$	265.0		$	263.8		$	595.4		$	530.4
Other comprehensive income, net of tax:
Investment securities:
Net unrealized holding gains (losses) arising during the period	36.9			31.0			9.2			55.9
Reclassification of gain on sale included in investment income	(6.0		)	—			(6.0		)	—
Income tax benefit (expense)	1.2			(1.5		)	1.2			(1.5		)
Investment securities, net	32.1			29.5			4.4			54.4
Defined benefit plans:
Net change in defined benefit plans arising during the period	—			—			(0.3		)	(3.2		)
Amortization of net actuarial (gains) losses included in compensation and benefits expense	0.7			0.1			1.4			0.2
Income tax benefit (expense)	(0.2		)	(0.1		)	(0.4		)	1.1
Defined benefit plans, net	0.5			—			0.7			(1.9		)
Derivative investments:
Net unrealized holding gains (losses) arising during the period	—			—			(4.7		)	—
Ineffectiveness on cash flow hedges included in (gain) loss on derivative investments	—			—			1.8			—
Amortization of effective portion of net (gain) loss on cash flow hedges included in interest expense	(0.3		)	(0.4		)	(0.6		)	(0.7		)
Income tax benefit (expense)	0.2			0.2			1.4			0.3
Derivative investments, net	(0.1		)	(0.2		)	(2.1		)	(0.4		)
Foreign currency translation:
Foreign currency translation adjustments	(2.6		)	1.8			(6.6		)	4.2
Income tax benefit (expense)	1.0			(0.7		)	2.5			(1.6		)
Foreign currency translation, net	(1.6		)	1.1			(4.1		)	2.6
Other comprehensive income, net of tax	30.9			30.4			(1.1		)	54.7
Comprehensive income	295.9			294.2			594.3			585.1
Less: comprehensive income attributable to non-controlling interests	—			—			—			(0.2		)
Comprehensive Income Attributable to CME Group	$	295.9		$	294.2		$	594.3		$	585.3

See accompanying notes to unaudited consolidated financial statements.

7

CME GROUP INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EQUITY

(dollars in millions, except per share data; shares in thousands)

(unaudited)

	Class A Common Stock (Shares)	Class B Common Stock (Shares)	Common Stock and Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Total CME Group Shareholders’ Equity
Balance at December 31, 2014	335,452	3	$	17,600.0		$	3,317.3		$	6.2		$	20,923.5
Net income attributable to CME Group						595.4						595.4
Other comprehensive income attributable to CME Group									(1.1		)	(1.1		)
Dividends on common stock of $1.00 per share						(337.2		)				(337.2		)
Exercise of stock options	652		42.1									42.1
Excess tax benefits from option exercises and restricted stock vesting			1.3									1.3
Vesting of issued restricted Class A common stock	46		(2.3		)							(2.3		)
Shares issued to Board of Directors	26		2.4									2.4
Shares issued under Employee Stock Purchase Plan	10		1.0									1.0
Stock-based compensation			33.7									33.7
Balance at June 30, 2015	336,186	3	$	17,678.2		$	3,575.5		$	5.1		$	21,258.8

See accompanying notes to unaudited consolidated financial statements.

8

CME GROUP INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EQUITY (continued)

(dollars in millions, except per share data; shares in thousands)

(unaudited)

	Class A Common Stock (Shares)	Class B Common Stock (Shares)	Common Stock and Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)		Total CME Group Shareholders’ Equity			Non-Controlling Interest			Total Equity
Balance at December 31, 2013	333,852	3	$	17,508.2		$	3,494.6		$	152.0	$	21,154.8		$	5.7		$	21,160.5
Net income attributable to CME Group and non-controlling interest						530.6					530.6			(0.2		)	530.4
Other comprehensive income attributable to CME Group									54.7		54.7						54.7
Dividends on common stock of $0.94 per share						(315.4		)			(315.4		)				(315.4		)
Purchase of non-controlling interest														(5.5		)	(5.5		)
Exercise of stock options	298		11.5								11.5						11.5
Excess tax benefits from option exercises and restricted stock vesting			2.9								2.9						2.9
Vesting of issued restricted Class A common stock	64		(2.7		)						(2.7		)				(2.7		)
Shares issued to Board of Directors	24		1.7								1.7						1.7
Shares issued under Employee Stock Purchase Plan	13		0.9								0.9						0.9
Stock-based compensation			26.4								26.4						26.4
Balance at June 30, 2014	334,251	3	$	17,548.9		$	3,709.8		$	206.7	$	21,465.4		$	—		$	21,465.4

See accompanying notes to unaudited consolidated financial statements.

9

CME GROUP INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in millions)

(unaudited)

	Six Months Ended June 30,
	2015			2014
Cash Flows from Operating Activities
Net income	$	595.4		$	530.4
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	33.7			26.4
Amortization of purchased intangibles	49.9			50.4
Depreciation and amortization	65.1			68.4
Gain on sale of BM&FBOVESPA shares	(5.9		)	—
Debt prepayment costs	61.8			—
Undistributed earnings, net of losses, of unconsolidated subsidiaries	(5.3		)	(19.2		)
Deferred income taxes	41.3			17.5
Change in:
Accounts receivable	(58.4		)	(31.9		)
Other current assets	8.1			(4.0		)
Other assets	(15.1		)	3.8
Accounts payable	(14.8		)	(4.1		)
Income taxes payable	(55.5		)	(27.5		)
Other current liabilities	(26.2		)	(55.2		)
Other liabilities	(0.1		)	(0.9		)
Other	3.7			0.6
Net Cash Provided by Operating Activities	677.7			554.7
Cash Flows from Investing Activities
Proceeds from maturities of available-for-sale marketable securities	19.1			18.3
Purchases of available-for-sale marketable securities	(19.2		)	(19.1		)
Purchases of property, net	(60.7		)	(77.4		)
Proceeds from sale of building property	—			7.9
Investments in business ventures	(5.0		)	—
Proceeds from sale of BM&FBOVESPA shares	57.7			—
Settlement of derivative related to debt issuance	7.0			—
Net Cash Used in Investing Activities	(1.1		)	(70.3		)
Cash Flows from Financing Activities
Proceeds from debt, net of issuance costs	743.7			—
Repayment of debt	(673.0		)	(750.0		)
Cash dividends	(1,006.7		)	(1,182.1		)
Proceeds from exercise of stock options	42.1			11.5
Excess tax benefits related to employee option exercises and restricted stock vesting	1.3			2.9
Other	0.9			0.9
Net Cash Used in Financing Activities	(891.7		)	(1,916.8		)
Net change in cash and cash equivalents	(215.1		)	(1,432.4		)
Cash and cash equivalents, beginning of period	1,366.1			2,469.7
Cash and Cash Equivalents, End of Period	$	1,151.0		$	1,037.3
Supplemental Disclosure of Cash Flow Information
Income taxes paid	$	393.3		$	322.0
Interest paid	46.3			66.8

See accompanying notes to unaudited consolidated financial statements.

10

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

1. 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 June 30, 2015 and December 31, 2014 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, 2014, filed with the Securities and Exchange Commission (SEC) on February 26, 2015.

2. Performance Bonds and Guaranty Fund Contributions

Performance Bonds and Guaranty Fund Contributions. At June 30, 2015, performance bonds and guaranty fund contribution assets on the consolidated balance sheets include cash and U.S. Treasury securities with maturity dates of 90 days or less. U.S. Treasury 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. At June 30, 2015, the amortized cost and fair value of the U.S. Treasury securities were both $17.6 billion. The U.S. Treasury securities will mature in the third quarter of 2015. 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 $2.5 billion at June 30, 2015.

Clearing House Contract Settlement. CME Clearing and CMECE mark-to-market open positions for all products at least once a day (twice a day for futures and options contracts). Based on values derived from the mark-to-market process, CME Clearing and CMECE require payment 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 over-the-counter 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 six months of 2015, CME Clearing and CMECE transferred an average of approximately $4.2 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 the guarantee exposure through initial and maintenance performance bond requirements and mandatory guaranty fund contributions. The company believes that the guarantee liability is immaterial and therefore has not recorded any liability at June 30, 2015.

11

3. Intangible Assets

Intangible assets consisted of the following at June 30, 2015 and December 31, 2014:

	June 30, 2015							December 31, 2014
(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	$	(706.7	)	$	2,132.1	$	2,838.8	$	(658.8	)	$	2,180.0
Technology-related intellectual property	29.4		(25.4		)	4.0		29.4		(23.5		)	5.9
Other	2.4		(0.9		)	1.5		2.4		(0.9		)	1.5
Total amortizable intangible assets	$	2,870.6	$	(733.0	)	2,137.6		$	2,870.6	$	(683.2	)	2,187.4
Indefinite-Lived Intangible Assets:
Trade names						450.0							450.0
Total intangible assets – other, net						$	2,587.6						$	2,637.4
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 $25.0 million and $25.2 million for the quarters ended June 30, 2015 and 2014, respectively. Total amortization expense for intangible assets was $49.9 million and $50.4 million for the six months ended June 30, 2015 and 2014, respectively. As of June 30, 2015, the future estimated amortization expense related to amortizable intangible assets is expected to be as follows:

(in millions)	Amortization Expense
Remainder of 2015	$	49.7
2016	96.1
2017	95.5
2018	94.7
2019	94.7
2020	94.7
Thereafter	1,612.2

4. Long-Term Investments

In the second quarter of 2015, the company sold approximately 14.3 million shares of BM&FBOVESPA S.A. (BM&FBOVESPA) and recognized a net gain of $5.9 million within investment income on the consolidated statements of income. The company continues to own an approximate 5% interest in BM&FBOVESPA. The fair value and cost basis of the remaining investment in BM&FBOVESPA are $362.9 million and $353.9 million, respectively.

5. Debt

In April 2015, the company repaid the $612.5 million fixed rate notes due 2018 and paid a call premium of $60.5 million. As a result of the transaction, the company recognized debt prepayment costs of $61.8 million in the second quarter of 2015, which includes the call premium.

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Long-term debt consisted of the following at June 30, 2015 and December 31, 2014:

(in millions)	June 30, 2015		December 31, 2014
$612.5 million fixed rate notes due March 2018, stated rate of 4.40%(1)	$	—	$	611.0
$750.0 million fixed rate notes due September 2022, stated rate of 3.00% (2)	748.4		748.2
$750.0 million fixed rate notes due March 2025, stated rate of 3.00%(3)	743.9		—
$750.0 million fixed rates notes due September 2043, stated rate of 5.30% (4)	748.7		748.7
Total long-term debt	$	2,241.0	$	2,107.9

(1) In February 2010, 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 4.46%.

(2) 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%.

(3) 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%.

(4) 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 as of June 30, 2015:

(in millions)	Par Value
2016	$	—
2017	—
2018	—
2019	—
2020	—
Thereafter	2,250.0

6. Contingencies

Legal and Regulatory Matters. In 2008, Fifth Market, Inc. (Fifth Market) filed a complaint against CME Group and CME in the Delaware District Court seeking a permanent injunction against CME's Globex system and unquantified enhanced damages for what the plaintiff alleges is willful infringement of two patents, in addition to costs, expenses and attorneys' fees. The case was stayed pending the outcome of CME's request for reexamination by the U.S. Patent and Trademark Office (USPTO). The reexaminations resulted in some claims being rejected and others being confirmed. In June 2013, the court lifted the stay. The validity of the patents, however, remains subject to further review by the USPTO. Based on its investigation to date and advice from legal counsel, the company believes this suit is without merit and intends to defend itself vigorously against these charges. CME filed covered business method reviews against both patents for the claims that remain after the reexaminations. All the claims asserted in the litigation have a proceeding instituted against them.  The reviews and one reexamination remain under way at the USPTO or are on appeal to the Federal Circuit.

The Fifth Market legal matter involves an alleged infringement of intellectual property which, due to its nature, involves a potential liability that is uncertain, difficult to quantify and involves a wide range of potential outcomes. We expect the re-examination and the reviews by the USPTO in the Fifth Market matter, including any appeals thereof, to result in a determination of the validity of the patent at issue which we expect will have an impact on the merits of the matter. Given the uncertainty of factors which may potentially impact the resolution of the matter, at this time the company is unable to estimate the reasonably possible loss or range of reasonably possible loss in the unlikely event it were found to be liable at trial in the matter.

In February 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 September 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.

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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 basis will not have a material impact on its consolidated financial position or results of operations.

At June 30, 2015 and December 31, 2014, the company had accrued $3.5 million and $4.3 million, respectively, for legal and regulatory matters that were probable and estimable.

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.

7. Guarantees

Mutual Offset Agreement. CME and Singapore Exchange Limited (SGX) have a mutual offset agreement with a current term through October 2015. 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 June 30, 2015, CME was contingently liable to SGX on letters of credit totaling $410.0 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 June 30, 2015.

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 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 in advance with the company 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 June 30, 2015.

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8. Accumulated Other Comprehensive Income

The following tables present changes in the accumulated balances for each component of other comprehensive income attributable to CME Group, including current period other comprehensive income and reclassifications out of accumulated other comprehensive income:

(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 before reclassifications and income tax benefit (expense)	9.2			(0.3		)	(4.7		)	(6.6		)	(2.4		)
Amounts reclassified from accumulated other comprehensive income	(6.0		)	1.4			1.2			—			(3.4		)
Income tax benefit (expense)	1.2			(0.4		)	1.4			2.5			4.7
Net current period other comprehensive income attributable to CME Group	4.4			0.7			(2.1		)	(4.1		)	(1.1		)
Balance at June 30, 2015	$	(18.5	)	$	(30.6	)	$	60.5		$	(6.3	)	$	5.1

(in millions)	Investment Securities			Defined Benefit Plans			Derivative Investments			Foreign Currency Translation			Total
Balance at December 31, 2013	$	98.9		$	(12.8	)	$	65.0		$	0.9		$	152.0
Other comprehensive income before reclassifications and income tax benefit (expense)	55.9			(3.2		)	—			4.2			56.9
Amounts reclassified from accumulated other comprehensive income	—			0.2			(0.7		)	—			(0.5		)
Income tax benefit (expense)	(1.5		)	1.1			0.3			(1.6		)	(1.7		)
Net current period other comprehensive income attributable to CME Group	54.4			(1.9		)	(0.4		)	2.6			54.7
Balance at June 30, 2014	$	153.3		$	(14.7	)	$	64.6		$	3.5		$	206.7

9. 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 and investments in publicly traded mutual funds 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.

The company determined the fair value of its contingent consideration liabilities, considered level 3 liabilities, using a discounted cash flow model to calculate the present value of future payouts. The liabilities were included in level 3 because management used significant unobservable inputs, including a discount rate of 20% and payout probabilities ranging from 75% to 100%. Significant changes in any of those inputs in isolation would result in a significantly different fair value.

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Financial assets and liabilities recorded in the consolidated balance sheet as of June 30, 2015 were classified in their entirety based on the lowest level of input that was significant to each asset or liability's fair value measurement. The following tables present financial instruments measured at fair value on a recurring basis:

	June 30, 2015
(in millions)	Level 1		Level 2		Level 3		Total
Assets at Fair Value:
Marketable securities:
U.S. Treasury securities	$	19.1	$	—	$	—	$	19.1
Mutual funds	56.7		—		—		56.7
Equity securities	0.1		—		—		0.1
Asset-backed securities	—		0.4		—		0.4
Total Marketable Securities	75.9		0.4		—		76.3
Performance bonds and guaranty fund contributions:
U.S. Treasury securities (1)	17,574.8		—		—		17,574.8
Equity investments	383.2		—		—		383.2
Total Assets at Fair Value	$	18,033.9	$	0.4	$	—	$	18,034.3
Liabilities at Fair Value:
Contingent consideration	$	—	$	—	$	17.8	$	17.8
Total Liabilities at Fair Value	$	—	$	—	$	17.8	$	17.8

(1) Performance bonds and guaranty fund contributions on the consolidated balance sheet at June 30, 2015 include cash collateral that has been invested in U.S. Treasury securities.

There were no transfers of assets or liabilities between level 1, level 2 and level 3 during the first six months of 2015. The following is a reconciliation of level 3 liabilities valued at fair value on a recurring basis during the first six months of 2015. There were no level 3 assets valued at fair value on a recurring basis during the first six months of 2015.

(in millions)	Contingent Consideration
Fair value of liability at December 31, 2014	$	17.7
Realized and unrealized (gains) losses:
Included in other expenses	0.1
Fair value of liability at June 30, 2015	$	17.8

There were no level 3 assets or level 3 liabilities valued at fair value on a nonrecurring basis during the first six months of 2015.

The following presents the estimated fair value of fixed rate notes, which are carried at amortized cost on the consolidated balance sheets. The fair values of the fixed rate notes due 2022, 2025 and 2043, which are classified as level 2 under the fair value hierarchy, were estimated using quoted market prices. At June 30, 2015, the fair values of the fixed rate notes were as follows:

(in millions)	Fair Value
Level 2:
$750.0 million fixed rate notes due September 2022, stated rate of 3.00%	$	752.1
$750.0 million fixed rate notes due March 2025, stated rate of 3.00%	727.9
$750.0 million fixed rates notes due September 2043, stated rate of 5.30%	825.8

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10. 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 and restricted stock awards were as follows for the periods presented:

	Quarter Ended June 30,		Six Months Ended June 30,
(in thousands)	2015	2014	2015	2014
Stock options	456	1,480	456	1,480
Stock awards	8	—	11	—
Total	464	1,480	467	1,480

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

	Quarter Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Net Income Attributable to CME Group (in millions)	$	265.0	$	263.8	$	595.4	$	530.6
Weighted Average Number of Common Shares (in thousands):
Basic	336,036		334,097		335,859		334,002
Effect of stock options and restricted stock awards	1,760		1,703		1,715		1,703
Diluted	337,796		335,800		337,574		335,705
Earnings per Common Share Attributable to CME Group:
Basic	$	0.79	$	0.79	$	1.77	$	1.59
Diluted	0.78		0.79		1.76		1.58

11. 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.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion is provided as a supplement to, and should be read in conjunction with, the accompanying unaudited consolidated financial statements and notes in this Quarterly Report on Form 10-Q and in our Annual Report on Form 10-K for the year ended December 31, 2014.

References in this discussion and analysis to “we,” “us” and “our” are to CME Group Inc. (CME Group) and its consolidated subsidiaries, collectively. References to “exchange” are to 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), collectively, unless otherwise noted. The clearing houses include CME Clearing, which is the U.S. clearing house and a division of CME, and CMECE.

RESULTS OF OPERATIONS

Financial Highlights

The following summarizes significant changes in our financial performance for the periods presented.

	Quarter Ended June 30,								Six Months Ended June 30,
(dollars in millions, except per share data)	2015			2014			Change		2015			2014			Change
Total revenues	$	820.0		$	731.6		12	%	$	1,662.7		$	1,509.0		10	%
Total expenses	324.9			319.6			2		660.3			642.5			3
Operating margin	60.4		%	56.3		%			60.3		%	57.4		%
Non-operating income (expense)	$	(47.0	)	$	10.1		n.m.		$	(30.5	)	$	2.0		n.m.
Effective tax rate	40.9		%	37.5		%			38.7		%	38.9		%
Net income attributable to CME Group	$	265.0		$	263.8		—		$	595.4		$	530.6		12
Diluted earnings per common share attributable to CME Group	0.78			0.79			(1	)	1.76			1.58			11
Cash flows from operating activities									677.7			554.7			22

n.m. not meaningful

Revenues

	Quarter Ended June 30,						Six Months Ended June 30,
(dollars in millions)	2015		2014		Change		2015		2014		Change
Clearing and transaction fees	$	681.8	$	609.3	12	%	$	1,390.0	$	1,261.5	10	%
Market data and information services	102.8		89.6		15		200.8		179.0		12
Access and communication fees	21.5		20.4		5		42.8		40.8		5
Other	13.9		12.3		13		29.1		27.7		5
Total Revenues	$	820.0	$	731.6	12		$	1,662.7	$	1,509.0	10

Clearing and Transaction Fees

Futures and Options Contracts

The following table summarizes our total contract volume, revenue and average rate per contract for futures and options. Total contract volume includes contracts that are traded on our exchange and cleared through CME Clearing and certain cleared-only contracts. Volume is measured in round turns, which is considered a completed transaction that involves a purchase and an offsetting sale of a contract. Average rate per contract is determined by dividing total clearing and transaction fees by total contract volume. Contract volume and average rate per contract disclosures exclude credit default swaps and interest rate swaps. The credit default swaps and interest rate swaps are discussed in a later section.

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	Quarter Ended June 30,						Six Months Ended June 30,
	2015		2014		Change		2015		2014		Change
Total contract volume (in millions)	854.2		796.0		7	%	1,768.5		1,629.2		9	%
Clearing and transaction fees (in millions)	$	663.7	$	596.0	11		$	1,352.2	$	1,235.3	9
Average rate per contract	$	0.777	$	0.749	4		$	0.765	$	0.758	1

We estimate the following increases in clearing and transaction fees based on changes in total contract volume and changes in average rate per contract for futures and options during the second quarter and first six months of 2015 when compared with the same periods in 2014.

(in millions)	Quarter Ended		Six Months Ended
Increases due to changes in total contract volume	$	45.2	$	106.5
Increases due to changes in average rate per contract	22.5		10.4
Increases in clearing and transaction fees	$	67.7	$	116.9

Average rate per contract is impacted by our rate structure, including volume-based incentives; product mix; trading venue, and the percentage of volume executed by customers who are members compared with non-member customers. Due to the relationship between average rate per contract and contract volume, the change in clearing and transaction fees attributable to changes in each is only an approximation.

Contract Volume

The following table summarizes average daily contract volume. Contract volume can be influenced by many factors, including political and economic conditions, the regulatory environment and market competition. 

	Quarter Ended June 30,						Six Months Ended June 30,
(amounts in thousands)	2015		2014		Change		2015		2014		Change
Average Daily Volume by Product Line:
Interest rate	6,599		6,668		(1	)%	7,070		6,696		6	%
Equity	2,364		2,465		(4	)	2,563		2,674		(4	)
Foreign exchange	903		638		42		928		726		28
Agricultural commodity	1,401		1,085		29		1,297		1,125		16
Energy	1,749		1,457		20		1,941		1,579		23
Metal	331		323		2		349		339		3
Aggregate average daily volume	13,347		12,636		6		14,148		13,139		8
Average Daily Volume by Venue:
Electronic	11,705		10,888		8		12,353		11,289		9
Open outcry	1,108		1,101		1		1,197		1,139		5
Privately negotiated (1)	534		647		(18	)	598		711		(16	)
Aggregate average daily volume	13,347		12,636		6		14,148		13,139		8
Electronic Volume as a Percentage of Total Volume	88	%	86	%			87	%	86	%

(1) Privately negotiated average daily volume includes traditional block trades, off-exchange trades which were historically categorized as CME ClearPort (now executed as futures block trades) and Exchange for Related Positions (EFRPs).

Total futures and options contract volume in the second quarter and first six months of 2015 increased when compared with the same periods in 2014. Domestically, improved economic indicators have led to anticipation of a 2015 Federal Reserve rate increase. The Federal Reserve’s decision was delayed in the second quarter, however, leading to an expectation of a late 2015 rate increase. As a result, interest rate volatility tapered off in the second quarter of 2015 after a strong first quarter.

Globally, after the crude oil supply shift that began in late 2014, there remains considerable uncertainty regarding the direction of future oil prices. Also, European debt concerns and quantitative easing by the European Central Bank contributed to the

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strengthening of the U.S. dollar compared with most major currencies. As a result, volatility has remained strong in the foreign exchange and energy markets in the first half of 2015.

Additionally, weather conditions during the second quarter of 2015 created concerns over planting delays for agricultural commodity products. This has resulted in an increase in price volatility, which has led to an increase in overall agricultural commodity contract volume in the second quarter and first six months of 2015 when compared with the same periods in 2014.

Interest Rate Products

The following table summarizes average daily contract volume for our key interest rate products. Eurodollar Front 8 futures include contracts expiring in two years or less. Eurodollar Back 32 futures include contracts with expirations after two years through ten years.

	Quarter Ended June 30,				Six Months Ended June 30,
(amounts in thousands)	2015	2014	Change		2015	2014	Change
Eurodollar futures and options:
Front 8 futures	1,471	1,451	1	%	1,689	1,441	17	%
Back 32 futures	719	1,012	(29	)	795	1,028	(23	)
Options	814	779	5		909	800	14
U.S. Treasury futures and options:
10-Year	1,781	1,665	7		1,780	1,689	5
5-Year	814	875	(7	)	855	874	(2	)
Treasury bond	351	419	(16	)	385	408	(6	)
2-Year	348	280	24		364	268	36

Overall interest rate contract volume decreased slightly in the second quarter of 2015 when compared with the same period in 2014, while contract volume increased in the first six months of 2015 when compared with the same period of 2014. A change in expectations in the first quarter of 2015 regarding the Federal Reserve's interest rate policy resulted in increases in contract volume for Eurodollar front 8 futures, Eurodollar options and 2-year U.S. Treasury futures and options. Because market participants anticipated a potential change in interest rates in the near term in early 2015, they shifted their focus to these shorter term products from longer term products, including the Back 32 Eurodollar futures and longer dated U.S. Treasury futures and options. Changes in macroeconomic factors and a shift from the first quarter's expectations regarding the Federal Reserve interest rate policy change lowered interest rate volatility throughout the second quarter of 2015, which resulted in a decrease in overall interest rate contract volume in the second quarter of 2015 when compared with the same period in 2014.

Equity Products

The following table summarizes average daily contract volume for our key equity products.

	Quarter Ended June 30,				Six Months Ended June 30,
(amounts in thousands)	2015	2014	Change		2015	2014	Change
E-mini S&P 500 futures and options	1,857	1,890	(2	)%	2,011	2,068	(3	)%
E-mini NASDAQ 100 futures and options	224	310	(28	)	253	313	(19	)

In the second quarter and first six months of 2015 when compared with the same periods in 2014, overall equity contract volumes decreased slightly due to overall low market volatility, as measured by the CBOE Volatility Index and CBOE Nasdaq-100 Volatility Index. We believe that the comparatively low volatility resulted from fewer market-moving geopolitical events in the first half of 2015 compared with same period in 2014.

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Foreign Exchange Products

The following table summarizes average daily contract volume for our key foreign exchange products.

	Quarter Ended June 30,				Six Months Ended June 30,
(amounts in thousands)	2015	2014	Change		2015	2014	Change
Euro	342	190	80	%	339	212	60	%
Japanese yen	145	124	17		158	145	9
British pound	114	97	17		117	109	8
Australian dollar	98	71	38		103	84	22
Canadian dollar	70	53	30		75	63	18

Foreign exchange contract volumes increased in the second quarter and first six months of 2015 when compared with the same periods in 2014 due to quantitative easing and debt concerns in Europe, global economic uncertainty and geopolitical events in the first half of 2015. These factors led to increases in exchange rate volatility across all major currencies, which resulted in higher contract volumes. Additionally, a strengthening U.S. dollar, led by signs of economic growth, has further resulted in higher volatility in the second quarter and first six months of 2015 when compared with the same periods in 2014.

Agricultural Commodity Products

The following table summarizes average daily contract volume for our key agricultural commodity products.

	Quarter Ended June 30,				Six Months Ended June 30,
(amounts in thousands)	2015	2014	Change		2015	2014	Change
Corn	473	359	32	%	430	374	15	%
Soybean	305	228	34		291	241	21
Wheat	226	164	38		199	165	21
Soybean oil	129	98	32		118	101	17

In the second quarter and first six months of 2015 when compared with the same periods in 2014, we believe overall agricultural commodity contract volumes increased due to higher price volatility caused by greater uncertainty surrounding weather conditions and concerns over planting delays in the second quarter of 2015.

Energy Products

The following table summarizes average daily contract volume for our key energy products.

	Quarter Ended June 30,				Six Months Ended June 30,
(amounts in thousands)	2015	2014	Change		2015	2014	Change
WTI crude oil	872	651	34	%	999	660	51	%
Natural gas	454	365	24		469	484	(3	)
Refined products	312	278	12		328	286	15
Brent crude oil	86	72	20		112	64	77

Overall energy contract volumes increased in the second quarter and first six months of 2015 when compared with the same periods in 2014 largely due to increases in crude oil trading. A continuing shift in crude oil supply that began in the fourth quarter of 2014 resulted in increased price volatility in the second quarter and first six months of 2015 when compared with the same periods in 2014. Additionally, refined products contract volumes increased largely due to increases in volatility in the underlying market. Natural gas contract volume also increased in the second quarter of 2015 when compared with the same period in 2014 due to higher price volatility.

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Metal Products

The following table summarizes average daily volume for our key metal products.

	Quarter Ended June 30,				Six Months Ended June 30,
(amounts in thousands)	2015	2014	Change		2015	2014	Change
Gold	179	175	3	%	200	191	4	%
Copper	67	60	11		68	61	13
Silver	65	67	(3	)	61	66	(7	)

Overall metal contract volumes remained flat in the second quarter and first six months of 2015 when compared with the same periods in 2014.

Average Rate per Contract

The average rate per contract increased in the second quarter and first six months of 2015 when compared with the same periods in 2014 due to shifts in the relative mix of product volume. Agricultural commodity, foreign exchange and energy contract volume, when measured as a percentage of total volume, collectively increased by 5 percentage points in the second quarter of 2015, while interest rate and equity contract volume collectively decreased 5 percentage points. Energy, foreign exchange and agricultural commodity contract volume, when measured as a percentage of total volume, collectively increased by 3 percentage points in the first six months of 2015, while equity and interest rate contract volume collectively decreased 3 percentage points. Energy, foreign exchange and agricultural commodity contracts have a higher average rate per contract compared with other product lines.

Cleared-only Swap Contracts

Clearing and transaction fees as presented on the consolidated statements of income include revenues for our cleared-only interest rate swap and credit default swap contracts. In the second quarter of 2015 and 2014, clearing and transaction fees generated from these contracts were $18.0 million and $13.3 million, respectively. In the first six months of 2015 and 2014, clearing and transaction fees generated from these contracts were $37.5 million and $26.1 million, respectively. The increases in revenues were largely attributable to increased sales efforts centered around customer education.

Concentration of Revenue

We bill a substantial portion of our clearing and transaction fees directly to our clearing firms. The majority of clearing and transaction fees received from clearing firms represent charges for trades executed and cleared on behalf of their customers. One firm represented 13% of our clearing and transaction fees in the first six months of 2015. Should a clearing firm withdraw, we believe that the customer portion of the firm’s trading activity would likely transfer to another clearing firm of the exchange. Therefore, we do not believe we are exposed to significant risk from the ongoing loss of revenue received from or through a particular clearing firm.

Other Sources of Revenue

The increases in market data and information services revenues in the second quarter and first six months of 2015 when compared with the same periods in 2014 were attributable to the reduction of fee waivers for existing customers beginning in 2015. The increases were partially offset by declines in market data subscriber counts attributable to screen count usage adjustments by customer firms as a result of the new market data pricing policies.

The two largest resellers of our market data represented approximately 45% of our market data and information services revenue in the first six months of 2015. Despite this concentration, we consider exposure to significant risk of revenue loss to be minimal. In the event that one of these vendors no longer subscribes to our market data, we believe the majority of that vendor’s customers would likely subscribe to our market data through another reseller. Additionally, several of our largest institutional customers that utilize services from our two largest resellers report usage and remit payment of their fees directly to us.

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Expenses

	Quarter Ended June 30,						Six Months Ended June 30,
(dollars in millions)	2015		2014		Change		2015		2014		Change
Compensation and benefits	$	141.5	$	139.7	1	%	$	282.8	$	275.2	3	%
Communications	6.6		8.3		(20	)	14.2		16.5		(14	)
Technology support services	16.1		14.6		11		31.7		28.5		11
Professional fees and outside services	27.7		37.5		(26	)	56.8		67.1		(15	)
Amortization of purchased intangibles	25.0		25.2		(1	)	49.9		50.4		(1	)
Depreciation and amortization	33.3		34.3		(3	)	65.1		68.4		(5	)
Occupancy and building operations	23.5		23.2		1		46.3		46.4		—
Licensing and other fee agreements	28.8		25.7		12		59.4		54.7		9
Other	22.4		11.1		101		54.1		35.3		53
Total Expenses	$	324.9	$	319.6	2		$	660.3	$	642.5	3

Operating expenses increased by $5.3 million and $17.8 million in the second quarter and first six months of 2015 when compared with the same periods in 2014. The following table shows the estimated impacts of key factors resulting in changes in operating expenses:

	Quarter Ended, June 30, 2015					Six Months Ended, June 30, 2015
	Amount  of Change			Change as  a Percentage of Total Expenses		Amount  of Change			Change as  a Percentage of Total Expenses
(dollars in millions)
MF Global bankruptcy claim	$	14.5		5	%	$	14.5		2	%
Real estate taxes and fees	10.0			3		10.0			1
Stock-based compensation	6.4			2		7.9			1
Foreign currency exchange rate fluctuation	(5.6		)	(2	)	7.5			1
Litigation accrual	—			—		6.3			1
Bonus expense	3.5			1		1.6			1
Reorganization costs and voluntary exit incentive plan	(5.8		)	(2	)	(0.3		)	—
Merger and acquisition costs	(4.7		)	(1	)	(5.9		)	(1	)
Salaries, benefits and employer taxes	(3.6		)	(1	)	(6.7		)	(1	)
Data center depreciation	(3.9		)	(1	)	(7.6		)	(1	)
Contingent consideration obligation	(4.8		)	(2	)	(8.3		)	(1	)
Other expenses, net	(0.7		)	—		(1.2		)	—
Total increase	$	5.3		2	%	$	17.8		3	%

Operating expenses increased in the second quarter and first six months of 2015 when compared with the same periods in 2014 due to increases as follows:

• In the second quarter of 2014, we recognized our claim from the MF Global bankruptcy filing, which occurred in the fourth quarter of 2011, as a reduction of other expenses.

• In the second quarter of 2015, we recognized additional real estate taxes and fees related to the transfer of the ownership of the NYMEX building, which was acquired in 2008 and sold in 2013.

• Performance awards issued as part of our stock-based compensation program resulted in increases in compensation and benefits in the second quarter and first six months of 2015 when compared with the same periods in 2014.

• In the first six months of 2015, we recognized a net gain of $1.1 million due to a favorable change in exchange rates on foreign cash balances, compared with a net gain of $8.6 million in the first six months of 2014. Gains and losses from exchange rate fluctuations primarily result when subsidiaries with a U.S. dollar functional currency hold cash as well as certain other monetary assets and liabilities denominated in foreign currencies. We expect to continue to incur gains and losses from exchange rate fluctuations.

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• A net reduction in a litigation accrual due to a favorable court ruling and a denial for a rehearing in the first quarter of 2014 resulted in an increase in overall operating expenses in the first six months of 2015 when compared with the same period in 2014.

• Bonus expense increased due to performance relative to our 2015 cash earnings target when compared with 2014 performance relative to our 2014 cash earnings target.

Increases in operating expenses in the second quarter and first six months of 2015 when compared with the same periods in 2014 were partially offset by the following decreases:

• In the second quarter of 2015, we recognized a net gain of $11.1 million due to a favorable change in exchange rates on foreign cash balance, compared with a net gain of $5.5 million in the second quarter of 2014, which partially offset the overall increase in expenses in the second quarter of 2015 when compared with the same period of 2014.

• We recognized expenses due to our voluntary exit incentive plan in the second quarter of 2014 within compensation and benefits expense.

• Professional fees and other expenses related to our proposed transaction with GFI Group Inc. were recognized in the first half of 2014. The agreement with GFI Group Inc. was terminated in January 2015.

• Compensation and benefits expenses decreased as a result of declines in average headcount largely related to our reorganization announced in the fourth quarter of 2014.

• Depreciation and amortization expense decreased largely due to the acceleration of depreciation expense in 2014 related to the consolidation of some of our data centers.

• Increases in the fair value of contingent consideration related to an acquisition completed in 2010 were recognized in the first and second quarter of 2014.

Non-Operating Income (Expense)

	Quarter Ended June 30,								Six Months Ended June 30,
(dollars in millions)	2015			2014			Change		2015			2014			Change
Investment income	$	18.5		$	15.1		22	%	$	24.2		$	18.3		32	%
Gains (losses) on derivative investments	—			—			—		(1.8		)	—			n.m.
Interest and other borrowing costs	(28.6		)	(28.3		)	1		(60.2		)	(62.0		)	(3	)
Equity in net earnings (losses) of unconsolidated subsidiaries	26.0			21.5			21		48.5			43.9			11
Other non-operating income (expense)	(62.9		)	1.8			n.m.		(41.2		)	1.8			n.m.
Total Non-Operating	$	(47.0	)	$	10.1		n.m.		$	(30.5	)	$	2.0		n.m.

n.m. not meaningful

The overall increases in investment income in the second quarter and first six months of 2015 when compared with the same periods in 2014 were largely due to a gain recognized on the sale of 14.3 million shares of our investment in BM&FBOVESPA S.A. (BM&FBOVESPA) recognized in the second quarter of 2015.

The following table shows the key impacts in the overall increase and decrease in interest expense and other borrowing costs in the second quarter and first six months of 2015, respectively, when compared with the same periods in 2014:

	Quarter Ended June 30,									Six Months Ended June 30,
	2015			2014			Change			2015			2014			Change
Weighted average borrowings outstanding (in millions)	$	2,304.4		$	2,112.5		$	191.9		$	2,300.1		$	2,300.0		$	0.1
Weighted average effective yield	3.73		%	4.15		%	(0.42		)%	3.90		%	4.27		%	(0.37		)%
Average cost of borrowings (1)	3.94			4.32			(0.38		)	4.13			4.44			(0.31		)

(1) Average cost of borrowings includes interest, the effective portion of interest rate hedges, discount accretion and debt issuance costs. Commitment fees on line of credit agreements are not included in the average cost of borrowing.

In February 2014, we repaid the $750.0 million of 5.75% fixed rate notes due February 2014 and in April 2015, we repurchased the $612.5 million 4.40% fixed rate notes due March 2018. In March 2015, we issued $750.0 million of 3.0% fixed rate notes

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due March 2025. These transactions contributed to an increase in weighted average borrowings outstanding in the second quarter of 2015 and a slight increase for the first six months of 2015 when compared to the same periods in 2014. These transactions decreased weighted average effective yield and average cost of borrowings for the second quarter and first six months of 2015 when compared with the same periods in 2014.

Higher income generated from our S&P/DJI business venture contributed to increases in equity in net gains (losses) of unconsolidated subsidiaries in the second quarter and first six months of 2015 when compared with the same period in 2014.

In April 2015, we repurchased the $612.5 million fixed rate notes due 2018 and paid a call premium of $60.5 million. As a result of the transaction, we recognized debt prepayment costs of $61.8 million in the second quarter of 2015, which includes the call premium and was included in other non-operating income (expense). In the first quarter of 2015, we received a termination fee, net of the portion paid to outside advisers, related to our proposed acquisition of GFI Group Inc. (GFI Group), which was also included in other non-operating income (expense).

Income Tax Provision

The following table summarizes the effective tax rates for the periods presented:

	2015		2014
Quarter Ended June 30	40.9	%	37.5	%
Six Months Ended June 30	38.7		38.9

In the second quarter of 2015, the overall effective tax rate was higher compared with the same period in 2014 due to additional deferred tax expense recognized from the remeasurement of deferred tax positions resulting from a state and local income tax law change in the second quarter of 2015.

In the first six months of 2015 when compared with the same period in 2014, the effective tax rate remained flat due to additional deferred tax expense recognized from state and local income tax law changes in both periods.

Liquidity and Capital Resources

Sources and Uses of Cash. Net cash provided by operating activities increased in the first six months of 2015 when compared with the same period of 2014. The increase in net cash provided by operating activities was largely attributable to the increase in trading volume as well as the receipt of the GFI Group termination fee. Net cash used in investing activities decreased in the first six months of 2015 when compared with the same period of 2014 largely due to proceeds from the sale of shares of our investment in BM&FBOVESPA. Cash used in financing activities was lower in the first six months of 2015 when compared with the same period in 2014. The decrease was attributable to the issuance of $750.0 million fixed rate notes due March 2025 in the first quarter of 2015, partially offset by the repayment of the $612.5 million fixed rate notes due March 2018 and payment of the call premium in the second quarter of 2015. In the first quarter of 2014, we repaid the $750.0 million fixed rate notes due February 2014.

Debt Instruments. The following table summarizes our debt outstanding at June 30, 2015:

(in millions)	Par Value
Fixed rate notes due September 2022, stated rate of 3.00% (1)	$	750.0
Fixed rate notes due March 2025, stated rate of 3.00% (2)	750.0
Fixed rate notes due September 2043, stated rate of 5.30% (3)	750.0

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

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

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

On March 9, 2015, we completed an offering of $750.0 million of 3.00% fixed rate notes due March 2025. In April 2015, we used the net proceeds of the offering to repurchase the $612.5 million fixed rate notes and paid a call premium of $60.5 million.

We maintain a $2.3 billion multi-currency revolving senior credit facility with various financial institutions, which matures in March 2020. The proceeds from this facility can be used for general corporate purposes, which includes providing liquidity for our clearing houses in certain circumstances at CME Group's discretion and, if necessary, for maturities of commercial paper. As long as we are not in default under this facility, we have the option to increase it up to $3.0 billion with the consent of the

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agent and lenders providing the additional funds. This facility is voluntarily pre-payable from time to time without premium or penalty. Under this facility, we are required to remain in compliance with a consolidated net worth test, which is defined as our consolidated shareholders' equity at December 31, 2014, giving effect to share repurchases made and special dividends paid during the term of the agreements (and in no event greater than $2.0 billion in aggregate), multiplied by 0.65. We currently do not have any borrowings outstanding under this facility.

We maintain a 364-day multi-currency revolving secured credit facility with a consortium of domestic and international banks to be used in certain situations by CME Clearing. The facility provides for borrowings of up to $7.0 billion. We may use the proceeds to provide temporary liquidity in the unlikely event of a clearing firm default, in the event of a liquidity constraint or default by a depositary (custodian for our collateral), or in the event of a temporary disruption with the domestic payments system that would delay payment of settlement variation between us and our clearing firms. CME clearing firm guaranty fund contributions received in the form of cash or U.S. Treasury securities as well as the performance bond assets of a defaulting firm can be used to collateralize the facility. At June 30, 2015, guaranty funds available to collateralize the facility totaled $7.2 billion. We have the option to request an increase in the line from $7.0 billion to $10.0 billion. In addition to the 364-day facility, we also have the option to use the $2.3 billion multi-currency revolving senior credit facility to provide liquidity for our clearing houses in the unlikely event of default in certain circumstances. In addition, our 364-day facility contains a requirement that CME remain in compliance with a consolidated tangible net worth test, defined as CME consolidated shareholder's equity less intangible assets (as defined in the agreement) of not less than $800.0 million. We currently do not have any borrowings outstanding under this facility.

The indentures governing our fixed rate notes, our $2.3 billion multi-currency revolving senior credit facility and our 364-day multi-currency revolving secured credit facility for $7.0 billion do not contain specific covenants that restrict the ability to pay dividends. These documents, however, do contain other customary financial and operating covenants that place restrictions on the operations of the company that could indirectly affect the ability to pay dividends.

At June 30, 2015, we have excess borrowing capacity for general corporate purposes of approximately $2.3 billion under our multi-currency revolving senior credit facility.

At June 30, 2015, we were in compliance with the various covenant requirements of all our debt facilities.

CME Group, as a holding company, has no operations of its own. Instead, it relies on dividends declared and paid to it by its subsidiaries in order to provide a portion of the funds which it uses to pay dividends to its shareholders.

To satisfy our performance bond obligation with Singapore Exchange Limited, we may pledge CME-owned U.S. Treasury securities in lieu of, or in combination with, irrevocable letters of credit. At June 30, 2015, the letters of credit totaled $410.0 million.

The following table summarizes our credit ratings at June 30, 2015:

	Short-Term	Long-Term
Rating Agency	Debt Rating	Debt Rating	Outlook
Standard & Poor’s	A1+	AA-	Stable
Moody’s Investors Service	P1	Aa3	Stable

Given our cash flow generation, our ability to pay down debt levels and our ability to refinance existing debt facilities if necessary, we expect to maintain an investment grade rating. If our ratings are downgraded below investment grade due to a change of control, we are required to make an offer to repurchase our fixed rate notes at a price equal to 101% of the principal amount, plus accrued and unpaid interest.

Liquidity and Cash Management. Cash and cash equivalents totaled $1.2 billion at June 30, 2015 and $1.4 billion at December 31, 2014. The balance retained in cash and cash equivalents is a function of anticipated or possible short-term cash needs, prevailing interest rates, our investment policy and alternative investment choices. A majority of our cash and cash equivalents balance is invested in money market mutual funds that invest only in U.S. Treasury securities or U.S. government agency securities. Our exposure to credit and liquidity risk is minimal given the nature of the investments. Cash that is not available for general corporate purposes because of regulatory requirements or other restrictions is classified as restricted cash and is included in other current assets or other assets in the consolidated balance sheets.

Net current deferred tax assets of $24.4 million were included in other current assets at June 30, 2015 and December 31, 2014, respectively. 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 at June 30, 2015 and December 31, 2014. 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.

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Valuation allowances of $100.1 million and $99.2 million have been provided on deferred tax assets at June 30, 2015 and December 31, 2014, respectively. At June 30, 2015 and December 31, 2014, valuation allowances were related to 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.

Regulatory Requirements. CME is regulated by the U.S. Commodity Futures Trading Commission (CFTC) as a U.S. Derivatives Clearing Organization (DCO). DCOs are required to maintain capital, as defined by the CFTC, in an amount at least equal to one year of projected operating expenses as well as cash, liquid securities, or a line of credit at least equal to six months of projected operating expenses. CME was designated by the Financial Stability Oversight Council as a systemically important DCO under Title VIII of the Dodd-Frank Wall Street Reform and Consumer Protection Act. As a result, CME must comply with the requirements for financial resources and liquidity resources. CME is in compliance with all DCO financial requirements.

CME, CBOT, NYMEX and COMEX are regulated by the CFTC as Designated Contract Markets (DCM). DCMs are required to maintain capital, as defined by the CFTC, in an amount at least equal to one year of projected operating expenses as well as cash, liquid securities or a line of credit at least equal to six months of projected operating expenses. Our DCMs are in compliance with all DCM financial requirements.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued a new standard on revenue recognition that replaces numerous, industry-specific requirements and converges U.S. accounting with International Financial Reporting Standards. The new standard introduces a framework for recognizing revenue that focuses on the transfer of control rather than risks and rewards. The new standard also requires significant additional disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments, changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The new standard was intended to become effective in the first annual period beginning after December 15, 2016, but in the second quarter of 2015, FASB extended the deadline by one year. This guidance may be adopted using one of two transition methods, which we are still evaluating along with the impact of the new standard on our consolidated financial statements.

In April 2015, the FASB issued a standards update that changes the presentation of debt issuance costs. The update requires entities to present debt issuance costs related to a recognized debt liability as a deduction from the carrying value of the debt liability. The update, which applies retrospectively upon adoption, is effective for reporting periods beginning after December 15, 2015. Early adoption is allowed. Adoption of the update will change the presentation of debt issuance costs and the carrying value of debt in our consolidated balance sheets. Adoption of the update is considered a change in accounting policy and will be disclosed accordingly. We believe the change in presentation will be immaterial to our consolidated financial statements.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are subject to various market risks, including those caused by changes in interest rates, credit, foreign currency exchange rates and equity prices. There have not been material changes in our exposure to market risk since December 31, 2014. Refer to Item 7A. of CME Group’s Annual Report on Form 10-K for the year ended December 31, 2014 for additional information.

ITEM 4. CONTROLS AND PROCEDURES

(a) Disclosure Controls and Procedures. Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act)) as of the end of the period covered by this report. Based on such evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of such period, our disclosure controls and procedures are effective.

(b) Changes in Internal Control Over Financial Reporting. As required by Rule 13a-15(d) under the Exchange Act, the company’s management, including the company’s Chief Executive Officer and Chief Financial Officer, have evaluated the company’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) to determine whether any changes occurred during the quarter covered by this quarterly report that have materially affected, or are reasonably likely to materially affect, the company’s internal control over financial reporting. There were no changes in the company’s internal control over financial reporting during the period covered by this quarterly report that have materially affected, or are reasonably likely to materially affect, internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

See “Legal and Regulatory Matters” in Note 6. Contingencies to the Consolidated Financial Statements for updates to CME Group’s existing legal proceedings disclosure which is incorporated herein by reference. Note 5. Contingencies includes updates to the legal proceedings disclosed in the company’s Annual Report on Form 10-K, filed with the SEC on February 26, 2015.

ITEM 1A. RISK FACTORS

There have been no material updates to the Risk Factors disclosure included in the company’s Annual Report on Form 10-K, filed with the SEC on February 26, 2015. In addition to the other information contained in this Quarterly Report on Form 10-Q, you should carefully consider the factors discussed in our Annual Report on Form 10-K, which are the risks that we believe are material at this time. These risks could materially and adversely affect our business, financial condition and results of operations. These risks and uncertainties are not the only ones facing us. Additional risks and uncertainties not presently known to us or that we currently believe to be immaterial may also adversely affect our business in the future.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(c) Issuer Purchases of Equity Securities

Period	(a) Total Number of Class A Shares Purchased (1)	(b) Average Price Paid Per Share		(c) Total Number of Class A Shares Purchased as Part of Publicly Announced Plans or Programs	(d) Maximum Number (or Approximate Value) that May Yet Be Purchased Under the Plans or Programs (in millions)
April 1 to April 30	498	$	90.24	—	$	—
May 1 to May 31	348	94.20		—	—
June 1 to June 30	1,509	96.62		—	—
Total	2,355	$	94.91	—

(1) Shares purchased consist of an aggregate of 2,355 shares of Class A common stock surrendered in the second quarter of 2015 to satisfy employees’ tax obligations upon the vesting of restricted stock.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

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ITEM 6. EXHIBITS

3.1	Eleventh Amended and Restated Bylaws of CME Group Inc. (incorporated by reference to Exhibit 3.1 to CME Group Inc.'s Current Report on Form 8-K, filed with the SEC on May 26, 2015, File No. 001-31553).
31.1	Section 302 Certification—Phupinder S. Gill
31.2	Section 302 Certification—John W. Pietrowicz
32.1	Section 906 Certification
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

29

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	CME Group Inc. (Registrant)
Dated: August 5, 2015	By:	/s/ John W. Pietrowicz
		Chief Financial Officer & Senior Managing Director Finance

30

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Phupinder S. Gill, certify that:

1. I have reviewed this report on Form 10-Q of CME Group Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: August 5, 2015	/s/ Phupinder S. Gill
	Name: Phupinder S. Gill
	Title: Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, John W. Pietrowicz, certify that:

1. I have reviewed this report on Form 10-Q of CME Group Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: August 5, 2015	/s/ John W. Pietrowicz
	Name: John W. Pietrowicz
	Title: Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of CEO and CFO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of CME Group Inc. (the “Company”) for the quarter ended June 30, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Phupinder S. Gill, as Chief Executive Officer of the Company, and John W. Pietrowicz, as Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Phupinder S. Gill

Name: Phupinder S. Gill

Title: Chief Executive Officer

Dated: August 5, 2015

/s/ John W. Pietrowicz

Name: John W. Pietrowicz

Title: Chief Financial Officer

Dated: August 5, 2015

This certification accompanies the Report pursuant to § 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of §18 of the Securities Exchange Act of 1934, as amended.

A signed original of this written statement required by § 906 of the Sarbanes-Oxley Act of 2002 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Fair Value Measurements Fair Value Measurements Narrative (Detail) (Details)	6 Months Ended
	Jun. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation model discount rate	20.00%
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valulation Model Probability Low Range	75.00%
Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Model Probability High Range	100.00%

XML

Debt Debt (Short-Term Debt) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Short-term Debt [Line Items]
Gains (Losses) on Extinguishment of Debt	$ (61.8)	$ 0.0
$612.5 million fixed rate notes due March 2018, interest equal to 4.40% [Member]
Short-term Debt [Line Items]
Debt Instrument, Face Amount	612.5
debt call premium	$ 60.5
Debt Instrument, Interest Rate, Stated Percentage	4.40%
Gains (Losses) on Extinguishment of Debt	$ (61.8)
$750.0 Million Fixed Rate Notes Due March 2043, Interest Equal To 5.3% [Member]
Short-term Debt [Line Items]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Interest Rate, Stated Percentage	5.30%

XML

Performance Bonds and Guaranty Fund Contributions (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Guarantor Obligations [Line Items]
Cash and cash equivalents	$ 1,151.0	$ 1,366.1	$ 1,037.3	$ 2,469.7
Average Daily Clearing Settlement	4,200.0
US Treasury Securities [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	23,000.0
Cash and Cash Equivalents, Fair Value Disclosure	17,600.0
Repurchase Agreements [Member]
Guarantor Obligations [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	$ 2,500.0

XML

Earnings Per Share (Net Income Attributable To CME Group) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Income Attributable to CME Group	$ 265.0	$ 263.8	$ 595.4	$ 530.6
Basic (in shares)	336,036	334,097	335,859	334,002
Dilutive Securities, Effect on EPS	1,760	1,703	1,715	1,703
Diluted (in shares)	337,796	335,800	337,574	335,705
Earnings per common share, basic (in dollars per share)	$ 0.79	$ 0.79	$ 1.77	$ 1.59
Earnings per common share, diluted (in dollars per share)	$ 0.78	$ 0.79	$ 1.76	$ 1.58
Retained Earnings [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Income Attributable to CME Group			$ 595.4	$ 530.6

XML

Fair Value Measurements (Financial Instruments Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Good Faith and Margin Deposits with Broker-Dealers	$ 42,167.9	$ 40,566.8
Investment Owned, at Fair Value	362.9
Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	76.3
Good Faith and Margin Deposits with Broker-Dealers	17,574.8
Investment Owned, at Fair Value	383.2
Total Assets at Fair Value	18,034.3
Contingent consideration at Fair Value	17.8
Total liabilities at fair value	17.8
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	19.1
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	0.4
Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	56.7
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] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	75.9
Good Faith and Margin Deposits with Broker-Dealers	17,574.8
Investment Owned, at Fair Value	383.2
Total Assets at Fair Value	18,033.9
Contingent consideration at Fair Value	0.0
Total liabilities at fair value	0.0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities at Fair Value	19.1
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 1 [Member] | Exchange Traded Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	56.7
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 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.4
Good Faith and Margin Deposits with Broker-Dealers	0.0
Investment Owned, at Fair Value	0.0
Total Assets at Fair Value	0.4
Contingent consideration at Fair Value	0.0
Total liabilities at fair value	0.0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury 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	0.4
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 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.0
Good Faith and Margin Deposits with Broker-Dealers	0.0
Investment Owned, at Fair Value	0.0
Total Assets at Fair Value	0.0
Contingent consideration at Fair Value	17.8	$ 17.7
Total liabilities at fair value	17.8
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury 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, 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

XML

Basis Of Presentation

6 Months Ended

Jun. 30, 2015

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 June 30, 2015 and December 31, 2014 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, 2014, filed with the Securities and Exchange Commission (SEC) on February 26, 2015.

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Long-Term Investments (Details) - USD ($) shares in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Investments, All Other Investments [Abstract]
Investment shares sold	14.3
Gain (Loss) on Sale of Investments	$ 5.9	$ 0.0
Sale of Stock, Percentage of Ownership after Transaction	5.00%
Investment Owned, at Fair Value	$ 362.9
Investment Owned, at Cost	$ 353.9

XML

Intangible Assets And Goodwill (Future Estimated Amortization Expense) (Details) $ in Millions	Jun. 30, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2015	$ 49.7
2016	96.1
2017	95.5
2018	94.7
2019	94.7
2020	94.7
Thereafter	$ 1,612.2

XML

Debt (Schedule Of Short-Term And Long-Term Debt) (Details) - USD ($) $ in Millions	1 Months Ended				6 Months Ended
	Mar. 31, 2015	Sep. 30, 2013	Sep. 30, 2012	Feb. 28, 2010	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt					$ 2,241.0	$ 2,107.9
Forward starting interest rate swap agreement fixed rate	3.11%	4.73%	3.32%	4.46%
$612.5 million fixed rate notes due March 2018, interest equal to 4.40% [Member]
Debt Instrument [Line Items]
Long-term debt					0.0	611.0
Debt Instrument, Face Amount					$ 612.5
Debt Instrument, Maturity Date					Mar. 01, 2018
Debt Instrument, Interest Rate, Stated Percentage					4.40%
$750 Million Fixed Rate Notes Due March 2022, Interest Equal To 3.0% [Member]
Debt Instrument [Line Items]
Long-term debt					$ 748.4	748.2
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, Interest Equal To 3.00%
Debt Instrument [Line Items]
Long-term debt					$ 743.9	0.0
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 March 2043, Interest Equal To 5.3% [Member]
Debt Instrument [Line Items]
Long-term debt					$ 748.7	$ 748.7
Debt Instrument, Face Amount					$ 750.0
Debt Instrument, Maturity Date					Sep. 01, 2043
Debt Instrument, Interest Rate, Stated Percentage					5.30%

XML

Debt (Schedule Of Maturities Of Long-Term Debt) (Details) $ in Millions	Jun. 30, 2015 USD ($)
Debt Disclosure [Abstract]
2016	$ 0.0
2017	0.0
2018	0.0
2019	0.0
2020	0.0
Thereafter	$ 2,250.0

XML

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities
Net income	$ 595.4	$ 530.4
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	33.7	26.4
Amortization of purchased intangibles	49.9	50.4
Depreciation and amortization	65.1	68.4
Gain (Loss) on Sale of Investments	(5.9)	0.0
Gains (Losses) on Extinguishment of Debt	61.8	0.0
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	(5.3)	(19.2)
Deferred income taxes	41.3	17.5
Change in:
Accounts receivable	(58.4)	(31.9)
Other current assets	8.1	(4.0)
Other assets	(15.1)	3.8
Accounts payable	(14.8)	(4.1)
Income taxes payable	(55.5)	(27.5)
Other current liabilities	(26.2)	(55.2)
Other liabilities	(0.1)	(0.9)
Other	3.7	0.6
Net Cash Provided by Operating Activities	677.7	554.7
Cash Flows from Investing Activities
Proceeds from maturities of available-for-sale marketable securities	19.1	18.3
Purchases of available-for-sale marketable securities	(19.2)	(19.1)
Purchases of property	(60.7)	(77.4)
Proceeds from sale of building property	0.0	7.9
Payments to Acquire Investments	5.0	0.0
Proceeds from Sale of Available-for-sale Securities, Equity	57.7	0.0
Settlement of derivative related to debt issuance	7.0	0.0
Net Cash Used in Investing Activities	(1.1)	(70.3)
Cash Flows from Financing Activities
Proceeds from other borrowings, net of issuance costs	743.7	0.0
Repayment of other borrowings	(673.0)	(750.0)
Cash dividends	(1,006.7)	(1,182.1)
Proceeds from exercise of stock options	42.1	11.5
Excess tax benefits related to employee option exercises and restricted stock vesting	1.3	2.9
Proceeds from (Payments for) Other Financing Activities	0.9	0.9
Net Cash Used in Financing Activities	(891.7)	(1,916.8)
Net change in cash and cash equivalents	(215.1)	(1,432.4)
Cash and cash equivalents, beginning of period	1,366.1	2,469.7
Cash and Cash Equivalents, End of Period	1,151.0	1,037.3
Supplemental Disclosure of Cash Flow Information
Income taxes paid	393.3	322.0
Interest paid	$ 46.3	$ 66.8

XML

Debt (Fair Value Of Fixed Rate Notes) (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total
$612.5 million fixed rate notes due March 2018, interest equal to 4.40% [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 612.5
Debt Instrument, Maturity Date	Mar. 01, 2018
$750 Million Fixed Rate Notes Due March 2022, Interest Equal To 3.0% [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Sep. 01, 2022
$750.0 Million Fixed Rate Notes Due March 2043, Interest Equal To 5.3% [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Sep. 01, 2043

XML

Fair Value Measurements Fair Value of Debt Instruments (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total
$750.0 Million Fixed Rate Notes Due March 2043, Interest Equal To 5.3% [Member]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Sep. 01, 2043
Debt Instrument, Interest Rate, Stated Percentage	5.30%
$750.0 Million Fixed Rate Notes Due March 2025, Interest Equal To 3.00%
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Mar. 01, 2025
Debt Instrument, Interest Rate, Stated Percentage	3.00%
$750 Million Fixed Rate Notes Due March 2022, Interest Equal To 3.0% [Member]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Sep. 01, 2022
Debt Instrument, Interest Rate, Stated Percentage	3.00%
$612.5 million fixed rate notes due March 2018, interest equal to 4.40% [Member]
Debt Instrument, Face Amount	$ 612.5
Debt Instrument, Maturity Date	Mar. 01, 2018
Debt Instrument, Interest Rate, Stated Percentage	4.40%
Fair Value, Inputs, Level 2 [Member] | $750.0 Million Fixed Rate Notes Due March 2043, Interest Equal To 5.3% [Member]
Debt Instrument, Fair Value Disclosure	$ 825.8
Fair Value, Inputs, Level 2 [Member] | $750.0 Million Fixed Rate Notes Due March 2025, Interest Equal To 3.00%
Debt Instrument, Fair Value Disclosure	727.9
Fair Value, Inputs, Level 2 [Member] | $750 Million Fixed Rate Notes Due March 2022, Interest Equal To 3.0% [Member]
Debt Instrument, Fair Value Disclosure	$ 752.1

XML

Consolidated Balance Sheets - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents		$ 1,151.0	$ 1,366.1
Marketable securities		76.3	74.7
Accounts receivable, net of allowance		399.9	341.2
Other current assets		260.0	196.5
Cash performance bonds and guaranty fund contributions		42,167.9	40,566.8
Total current assets		44,055.1	42,545.3
Property, net of accumulated depreciation and amortization		499.2	508.9
Intangible assets - trading products	[1]	17,175.3	17,175.3
Intangible assets - other, net		2,587.6	2,637.4
Goodwill		7,569.0	7,569.0
Other assets		1,776.9	1,805.6
Total Assets		73,663.1	72,241.5
Liabilities and Shareholders' Equity
Accounts payable		22.1	36.9
Other current liabilities		242.6	927.5
Cash performance bonds and guaranty fund contributions		42,167.9	40,566.8
Total current liabilities		42,432.6	41,531.2
Long-term debt		2,241.0	2,107.9
Deferred income tax liabilities, net		7,339.8	7,302.7
Other liabilities		390.9	376.2
Total Liabilities		52,404.3	51,318.0
Shareholders' Equity:
Preferred stock, $0.01 par value, 10,000 shares authorized, none issued or outstanding		0.0	0.0
Additional paid-in capital		17,674.8	17,596.6
Retained earnings		3,575.5	3,317.3
Accumulated other comprehensive income (loss)		5.1	6.2
Total Shareholders' Equity		21,258.8	20,923.5
Total Liabilities and Shareholders' Equity		73,663.1	72,241.5
Class A Common Stock [Member]
Shareholders' Equity:
Common stock		3.4	3.4
Class B Common Stock [Member]
Shareholders' Equity:
Common stock		$ 0.0	$ 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

XML

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]	Parent [Member]	Noncontrolling Interest [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]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 21,160.5
Balance (in shares) at Dec. 31, 2013								333,852		3
Balance at Dec. 31, 2013		$ 17,508.2	$ 3,494.6	$ 152.0	$ 21,154.8
Stockholders' Equity Attributable to Noncontrolling Interest at Dec. 31, 2013						$ 5.7
Net Income Attributable to CME Group	530.6		530.6		530.6
Net Income (Loss) Attributable to Noncontrolling Interest	(0.2)					(0.2)
Net income	530.4
Other Comprehensive Income (Loss), Net of Tax	54.7			54.7
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	54.7			54.7	54.7
Dividends on common stock per share	(315.4)		(315.4)		(315.4)
Adjustments to Additional Paid in Capital, Other	(5.5)					(5.5)
Exercise of stock options (in shares)								298
Exercise of stock options	11.5	11.5			11.5
Excess tax benefits from option exercises and restricted stock vesting	2.9	2.9			2.9
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures								64
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(2.7)	(2.7)			(2.7)
Stock Issued To Related Parties During Period Shares								24
Stock Issued To Related Parties During Period Value	1.7	1.7			1.7
Stock Issued During Period, Shares, Employee Stock Purchase Plans								13
Stock Issued During Period, Value, Employee Stock Purchase Plan	0.9	0.9			0.9
Stock Granted, Value, Share-based Compensation, Gross	26.4	26.4			26.4
Stockholders' Equity Attributable to Noncontrolling Interest at Jun. 30, 2014						$ 0.0
Balance (in shares) at Jun. 30, 2014								334,251		3
Balance at Jun. 30, 2014		17,548.9	3,709.8	206.7	21,465.4
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	21,465.4
Balance (in shares) at Dec. 31, 2014							335,452	335,452	3	3
Balance at Dec. 31, 2014	20,923.5	17,600.0	3,317.3	6.2	20,923.5
Net Income Attributable to CME Group	595.4		595.4		595.4
Net Income (Loss) Attributable to Noncontrolling Interest	0.0
Other Comprehensive Income (Loss), Net of Tax	(1.1)			(1.1)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent					(1.1)
Dividends on common stock per share			(337.2)		(337.2)
Exercise of stock options (in shares)								652
Exercise of stock options		42.1			42.1
Excess tax benefits from option exercises and restricted stock vesting		1.3			1.3
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures								46
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		(2.3)			(2.3)
Stock Issued To Related Parties During Period Shares								26
Stock Issued To Related Parties During Period Value		2.4			2.4
Stock Issued During Period, Shares, Employee Stock Purchase Plans								10
Stock Issued During Period, Value, Employee Stock Purchase Plan		1.0			1.0
Stock Granted, Value, Share-based Compensation, Gross		33.7			33.7
Balance (in shares) at Jun. 30, 2015							336,186	336,186	3	3
Balance at Jun. 30, 2015	$ 21,258.8	$ 17,678.2	$ 3,575.5	$ 5.1	$ 21,258.8

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Guarantees (Details) - Jun. 30, 2015	USD ($) years
Guarantor Obligations [Line Items]
Agreement automatic renewal period (in years) | years	1
Contingent liability to SGX, amount of irrevocable letters of credit	$ 410,000,000
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

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Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2015

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

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following tables present changes in the accumulated balances for each component of other comprehensive income attributable to CME Group, including current period other comprehensive income and reclassifications out of accumulated other comprehensive income:

(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 before reclassifications and income tax benefit (expense)	9.2			(0.3		)	(4.7		)	(6.6		)	(2.4		)
Amounts reclassified from accumulated other comprehensive income	(6.0		)	1.4			1.2			—			(3.4		)
Income tax benefit (expense)	1.2			(0.4		)	1.4			2.5			4.7
Net current period other comprehensive income attributable to CME Group	4.4			0.7			(2.1		)	(4.1		)	(1.1		)
Balance at June 30, 2015	$	(18.5	)	$	(30.6	)	$	60.5		$	(6.3	)	$	5.1

(in millions)	Investment Securities			Defined Benefit Plans			Derivative Investments			Foreign Currency Translation			Total
Balance at December 31, 2013	$	98.9		$	(12.8	)	$	65.0		$	0.9		$	152.0
Other comprehensive income before reclassifications and income tax benefit (expense)	55.9			(3.2		)	—			4.2			56.9
Amounts reclassified from accumulated other comprehensive income	—			0.2			(0.7		)	—			(0.5		)
Income tax benefit (expense)	(1.5		)	1.1			0.3			(1.6		)	(1.7		)
Net current period other comprehensive income attributable to CME Group	54.4			(1.9		)	(0.4		)	2.6			54.7
Balance at June 30, 2014	$	153.3		$	(14.7	)	$	64.6		$	3.5		$	206.7

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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Balance			$ 20,923.5
Net unrealized holding gains arising during the period	$ 36.9	$ 31.0	9.2	$ 55.9
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0.0	0.0	(0.3)	(3.2)
Net unrealized holding losses arising during the period	0.0	0.0	(4.7)	0.0
Foreign currency translation adjustment	(2.6)	1.8	(6.6)	4.2
Reclassification adjustment for gains included in investment income	6.0	0.0	6.0	0.0
Amortization of net actuarial (gains) losses included in pension expense	0.7	0.1	1.4	0.2
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	0.3	0.4	0.6	0.7
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	(1.2)	1.5	(1.2)	1.5
Defined benefit plans, income tax benefit (expense)	0.2	0.1	0.4	(1.1)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(1.0)	0.7	(2.5)	1.6
Other Comprehensive Income (Loss), Net of Tax	30.9	30.4	(1.1)	54.7
Balance	21,258.8		21,258.8
Accumulated Other Comprehensive Income (Loss) [Member]
Balance			6.2	152.0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			(3.4)	(0.5)
Comprehensive Income Before Reclassification Adjustments			(2.4)	56.9
Comprehensive Income, Tax			4.7	(1.7)
Other Comprehensive Income (Loss), Net of Tax			(1.1)	54.7
Balance	5.1	206.7	5.1	206.7
Accumulated Translation Adjustment [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Balance			(2.2)	0.9
Reclassification adjustment for loss included in net income			0.0	0.0
Foreign currency translation adjustment			(6.6)	4.2
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax			2.5	(1.6)
Other Comprehensive Income (Loss), Net of Tax			(4.1)	2.6
Balance	(6.3)	3.5	(6.3)	3.5
Investment Securities [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Balance			(22.9)	98.9
Net unrealized holding gains arising during the period			9.2	55.9
Reclassification adjustment for gains included in investment income			(6.0)	0.0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax			1.2	(1.5)
Other Comprehensive Income (Loss), Net of Tax			4.4	54.4
Balance	(18.5)	153.3	(18.5)	153.3
Derivative Financial Instruments, Assets [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Balance			62.6	65.0
Net unrealized holding losses arising during the period			(4.7)	0.0
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax			1.2	(0.7)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax			1.4	0.3
Other Comprehensive Income (Loss), Net of Tax			(2.1)	(0.4)
Balance	60.5	64.6	60.5	64.6
Pension Plans, Defined Benefit [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Balance			(31.3)	(12.8)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax			(0.3)	(3.2)
Amortization of net actuarial (gains) losses included in pension expense			1.4	0.2
Defined benefit plans, income tax benefit (expense)			(0.4)	1.1
Other Comprehensive Income (Loss), Net of Tax			0.7	(1.9)
Balance	$ (30.6)	$ (14.7)	$ (30.6)	$ (14.7)

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

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

	Quarter Ended June 30,		Six Months Ended June 30,
(in thousands)	2015	2014	2015	2014
Stock options	456	1,480	456	1,480
Stock awards	8	—	11	—
Total	464	1,480	467	1,480

Basic And Diluted Earnings Per Share

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

	Quarter Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Net Income Attributable to CME Group (in millions)	$	265.0	$	263.8	$	595.4	$	530.6
Weighted Average Number of Common Shares (in thousands):
Basic	336,036		334,097		335,859		334,002
Effect of stock options and restricted stock awards	1,760		1,703		1,715		1,703
Diluted	337,796		335,800		337,574		335,705
Earnings per Common Share Attributable to CME Group:
Basic	$	0.79	$	0.79	$	1.77	$	1.59
Diluted	0.78		0.79		1.76		1.58

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Consolidated Statements Of Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock, per share (in dollars per share)	$ 1.00	$ 0.94

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Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Accounts receivable, allowance	$ 0.9	$ 1.2
Restricted cash, current	32.0	37.0
Accumulated depreciation and amortization, property	781.5	741.0
Restricted cash, noncurrent	$ 73.5	$ 72.4
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)	336,186	335,452
Common stock, shares outstanding (in shares)	336,186	335,452
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

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Fair Value Measurements

6 Months Ended

Jun. 30, 2015

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

Fair Value Measurements

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 and investments in publicly traded mutual funds 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.

The company determined the fair value of its contingent consideration liabilities, considered level 3 liabilities, using a discounted cash flow model to calculate the present value of future payouts. The liabilities were included in level 3 because management used significant unobservable inputs, including a discount rate of 20% and payout probabilities ranging from 75% to 100%. Significant changes in any of those inputs in isolation would result in a significantly different fair value.

Financial assets and liabilities recorded in the consolidated balance sheet as of June 30, 2015 were classified in their entirety based on the lowest level of input that was significant to each asset or liability's fair value measurement. The following tables present financial instruments measured at fair value on a recurring basis:

	June 30, 2015
(in millions)	Level 1		Level 2		Level 3		Total
Assets at Fair Value:
Marketable securities:
U.S. Treasury securities	$	19.1	$	—	$	—	$	19.1
Mutual funds	56.7		—		—		56.7
Equity securities	0.1		—		—		0.1
Asset-backed securities	—		0.4		—		0.4
Total Marketable Securities	75.9		0.4		—		76.3
Performance bonds and guaranty fund contributions:
U.S. Treasury securities (1)	17,574.8		—		—		17,574.8
Equity investments	383.2		—		—		383.2
Total Assets at Fair Value	$	18,033.9	$	0.4	$	—	$	18,034.3
Liabilities at Fair Value:
Contingent consideration	$	—	$	—	$	17.8	$	17.8
Total Liabilities at Fair Value	$	—	$	—	$	17.8	$	17.8

(1) Performance bonds and guaranty fund contributions on the consolidated balance sheet at June 30, 2015 include cash collateral that has been invested in U.S. Treasury securities.

There were no transfers of assets or liabilities between level 1, level 2 and level 3 during the first six months of 2015. The following is a reconciliation of level 3 liabilities valued at fair value on a recurring basis during the first six months of 2015. There were no level 3 assets valued at fair value on a recurring basis during the first six months of 2015.

(in millions)	Contingent Consideration
Fair value of liability at December 31, 2014	$	17.7
Realized and unrealized (gains) losses:
Included in other expenses	0.1
Fair value of liability at June 30, 2015	$	17.8

There were no level 3 assets or level 3 liabilities valued at fair value on a nonrecurring basis during the first six months of 2015.

The following presents the estimated fair value of fixed rate notes, which are carried at amortized cost on the consolidated balance sheets. The fair values of the fixed rate notes due 2022, 2025 and 2043, which are classified as level 2 under the fair value hierarchy, were estimated using quoted market prices. At June 30, 2015, the fair values of the fixed rate notes were as follows:

(in millions)	Fair Value
Level 2:
$750.0 million fixed rate notes due September 2022, stated rate of 3.00%	$	752.1
$750.0 million fixed rate notes due March 2025, stated rate of 3.00%	727.9
$750.0 million fixed rates notes due September 2043, stated rate of 5.30%	825.8

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Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 15, 2015
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2015
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		337,756,060
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

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Earnings Per Share

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Earnings Per Share

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 and restricted stock awards were as follows for the periods presented:

	Quarter Ended June 30,		Six Months Ended June 30,
(in thousands)	2015	2014	2015	2014
Stock options	456	1,480	456	1,480
Stock awards	8	—	11	—
Total	464	1,480	467	1,480

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

	Quarter Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Net Income Attributable to CME Group (in millions)	$	265.0	$	263.8	$	595.4	$	530.6
Weighted Average Number of Common Shares (in thousands):
Basic	336,036		334,097		335,859		334,002
Effect of stock options and restricted stock awards	1,760		1,703		1,715		1,703
Diluted	337,796		335,800		337,574		335,705
Earnings per Common Share Attributable to CME Group:
Basic	$	0.79	$	0.79	$	1.77	$	1.59
Diluted	0.78		0.79		1.76		1.58

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Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Clearing and transaction fees	$ 681.8	$ 609.3	$ 1,390.0	$ 1,261.5
Market data and information services	102.8	89.6	200.8	179.0
Access and communication fees	21.5	20.4	42.8	40.8
Other	13.9	12.3	29.1	27.7
Total Revenues	820.0	731.6	1,662.7	1,509.0
Expenses
Compensation and benefits	141.5	139.7	282.8	275.2
Communications	6.6	8.3	14.2	16.5
Technology support services	16.1	14.6	31.7	28.5
Professional fees and outside services	27.7	37.5	56.8	67.1
Amortization of purchased intangibles	25.0	25.2	49.9	50.4
Depreciation and amortization	33.3	34.3	65.1	68.4
Occupancy and building operations	23.5	23.2	46.3	46.4
Licensing and other fee agreements	28.8	25.7	59.4	54.7
Other	22.4	11.1	54.1	35.3
Total Expenses	324.9	319.6	660.3	642.5
Operating Income	495.1	412.0	1,002.4	866.5
Non-Operating Income (Expense)
Investment income	18.5	15.1	24.2	18.3
Gain (Loss) on Derivative Instruments, Net, Pretax	0.0	0.0	(1.8)	0.0
Interest and other borrowing costs	(28.6)	(28.3)	(60.2)	(62.0)
Equity in net losses of unconsolidated subsidiaries	26.0	21.5	48.5	43.9
Other non-operating income (expense)	(62.9)	1.8	(41.2)	1.8
Total Non-Operating	(47.0)	10.1	(30.5)	2.0
Income before Income Taxes	448.1	422.1	971.9	868.5
Income tax provision	183.1	158.3	376.5	338.1
Net income	265.0	263.8	595.4	530.4
Net Income (Loss) Attributable to Noncontrolling Interest	0.0	0.0	0.0	(0.2)
Net Income Attributable to CME Group	$ 265.0	$ 263.8	$ 595.4	$ 530.6
Earnings per Common Share Attributable to CME Group:
Basic (in dollars per share)	$ 0.79	$ 0.79	$ 1.77	$ 1.59
Diluted (in dollars per share)	$ 0.78	$ 0.79	$ 1.76	$ 1.58
Weighted Average Number of Common Shares:
Basic (in shares)	336,036	334,097	335,859	334,002
Diluted (in shares)	337,796	335,800	337,574	335,705

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Long-Term Investments (Notes)

6 Months Ended

Jun. 30, 2015

Investments, All Other Investments [Abstract]

Investments and Other Noncurrent Assets [Text Block]

Long-Term Investments

In the second quarter of 2015, the company sold approximately 14.3 million shares of BM&FBOVESPA S.A. (BM&FBOVESPA) and recognized a net gain of $5.9 million within investment income on the consolidated statements of income. The company continues to own an approximate 5% interest in BM&FBOVESPA. The fair value and cost basis of the remaining investment in BM&FBOVESPA are $362.9 million and $353.9 million, respectively.

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Intangible Assets And Goodwill

6 Months Ended

Jun. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets And Goodwill

Intangible Assets

Intangible assets consisted of the following at June 30, 2015 and December 31, 2014:

	June 30, 2015							December 31, 2014
(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	$	(706.7	)	$	2,132.1	$	2,838.8	$	(658.8	)	$	2,180.0
Technology-related intellectual property	29.4		(25.4		)	4.0		29.4		(23.5		)	5.9
Other	2.4		(0.9		)	1.5		2.4		(0.9		)	1.5
Total amortizable intangible assets	$	2,870.6	$	(733.0	)	2,137.6		$	2,870.6	$	(683.2	)	2,187.4
Indefinite-Lived Intangible Assets:
Trade names						450.0							450.0
Total intangible assets – other, net						$	2,587.6						$	2,637.4
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 $25.0 million and $25.2 million for the quarters ended June 30, 2015 and 2014, respectively. Total amortization expense for intangible assets was $49.9 million and $50.4 million for the six months ended June 30, 2015 and 2014, respectively. As of June 30, 2015, the future estimated amortization expense related to amortizable intangible assets is expected to be as follows:

(in millions)	Amortization Expense
Remainder of 2015	$	49.7
2016	96.1
2017	95.5
2018	94.7
2019	94.7
2020	94.7
Thereafter	1,612.2

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

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:

	June 30, 2015
(in millions)	Level 1		Level 2		Level 3		Total
Assets at Fair Value:
Marketable securities:
U.S. Treasury securities	$	19.1	$	—	$	—	$	19.1
Mutual funds	56.7		—		—		56.7
Equity securities	0.1		—		—		0.1
Asset-backed securities	—		0.4		—		0.4
Total Marketable Securities	75.9		0.4		—		76.3
Performance bonds and guaranty fund contributions:
U.S. Treasury securities (1)	17,574.8		—		—		17,574.8
Equity investments	383.2		—		—		383.2
Total Assets at Fair Value	$	18,033.9	$	0.4	$	—	$	18,034.3
Liabilities at Fair Value:
Contingent consideration	$	—	$	—	$	17.8	$	17.8
Total Liabilities at Fair Value	$	—	$	—	$	17.8	$	17.8

(1) Performance bonds and guaranty fund contributions on the consolidated balance sheet at June 30, 2015 include cash collateral that has been invested in U.S. Treasury securities.

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 six months of 2015. There were no level 3 assets valued at fair value on a recurring basis during the first six months of 2015.

(in millions)	Contingent Consideration
Fair value of liability at December 31, 2014	$	17.7
Realized and unrealized (gains) losses:
Included in other expenses	0.1
Fair value of liability at June 30, 2015	$	17.8

Fair value of Debt Instruments [Table Text Block]

At June 30, 2015, the fair values of the fixed rate notes were as follows:

(in millions)	Fair Value
Level 2:
$750.0 million fixed rate notes due September 2022, stated rate of 3.00%	$	752.1
$750.0 million fixed rate notes due March 2025, stated rate of 3.00%	727.9
$750.0 million fixed rates notes due September 2043, stated rate of 5.30%	825.8

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Subsequent Events

6 Months Ended

Jun. 30, 2015

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.

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Guarantees

6 Months Ended

Jun. 30, 2015

Guarantees [Abstract]

Guarantees

Guarantees

Mutual Offset Agreement. CME and Singapore Exchange Limited (SGX) have a mutual offset agreement with a current term through October 2015. 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 June 30, 2015, CME was contingently liable to SGX on letters of credit totaling $410.0 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 June 30, 2015.

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 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 in advance with the company 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 June 30, 2015.

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Debt

6 Months Ended

Jun. 30, 2015

Debt Disclosure [Abstract]

Debt

Debt

In April 2015, the company repaid the $612.5 million fixed rate notes due 2018 and paid a call premium of $60.5 million. As a result of the transaction, the company recognized debt prepayment costs of $61.8 million in the second quarter of 2015, which includes the call premium.

Long-term debt consisted of the following at June 30, 2015 and December 31, 2014:

(in millions)	June 30, 2015		December 31, 2014
$612.5 million fixed rate notes due March 2018, stated rate of 4.40%(1)	$	—	$	611.0
$750.0 million fixed rate notes due September 2022, stated rate of 3.00% (2)	748.4		748.2
$750.0 million fixed rate notes due March 2025, stated rate of 3.00%(3)	743.9		—
$750.0 million fixed rates notes due September 2043, stated rate of 5.30% (4)	748.7		748.7
Total long-term debt	$	2,241.0	$	2,107.9

(1) In February 2010, 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 4.46%.

(2) 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%.

(3) 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%.

(4) 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 as of June 30, 2015:

(in millions)	Par Value
2016	$	—
2017	—
2018	—
2019	—
2020	—
Thereafter	2,250.0

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Contingencies

6 Months Ended

Jun. 30, 2015

Loss Contingency [Abstract]

Contingencies

Contingencies

Legal and Regulatory Matters. In 2008, Fifth Market, Inc. (Fifth Market) filed a complaint against CME Group and CME in the Delaware District Court seeking a permanent injunction against CME's Globex system and unquantified enhanced damages for what the plaintiff alleges is willful infringement of two patents, in addition to costs, expenses and attorneys' fees. The case was stayed pending the outcome of CME's request for reexamination by the U.S. Patent and Trademark Office (USPTO). The reexaminations resulted in some claims being rejected and others being confirmed. In June 2013, the court lifted the stay. The validity of the patents, however, remains subject to further review by the USPTO. Based on its investigation to date and advice from legal counsel, the company believes this suit is without merit and intends to defend itself vigorously against these charges. CME filed covered business method reviews against both patents for the claims that remain after the reexaminations. All the claims asserted in the litigation have a proceeding instituted against them.  The reviews and one reexamination remain under way at the USPTO or are on appeal to the Federal Circuit.

The Fifth Market legal matter involves an alleged infringement of intellectual property which, due to its nature, involves a potential liability that is uncertain, difficult to quantify and involves a wide range of potential outcomes. We expect the re-examination and the reviews by the USPTO in the Fifth Market matter, including any appeals thereof, to result in a determination of the validity of the patent at issue which we expect will have an impact on the merits of the matter. Given the uncertainty of factors which may potentially impact the resolution of the matter, at this time the company is unable to estimate the reasonably possible loss or range of reasonably possible loss in the unlikely event it were found to be liable at trial in the matter.

In February 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 September 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 basis will not have a material impact on its consolidated financial position or results of operations.

At June 30, 2015 and December 31, 2014, the company had accrued $3.5 million and $4.3 million, respectively, for legal and regulatory matters that were probable and estimable.

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.

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Accumulated Other Comprehensive Income (Notes)

6 Months Ended

Jun. 30, 2015

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

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated Other Comprehensive Income

The following tables present changes in the accumulated balances for each component of other comprehensive income attributable to CME Group, including current period other comprehensive income and reclassifications out of accumulated other comprehensive income:

(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 before reclassifications and income tax benefit (expense)	9.2			(0.3		)	(4.7		)	(6.6		)	(2.4		)
Amounts reclassified from accumulated other comprehensive income	(6.0		)	1.4			1.2			—			(3.4		)
Income tax benefit (expense)	1.2			(0.4		)	1.4			2.5			4.7
Net current period other comprehensive income attributable to CME Group	4.4			0.7			(2.1		)	(4.1		)	(1.1		)
Balance at June 30, 2015	$	(18.5	)	$	(30.6	)	$	60.5		$	(6.3	)	$	5.1

(in millions)	Investment Securities			Defined Benefit Plans			Derivative Investments			Foreign Currency Translation			Total
Balance at December 31, 2013	$	98.9		$	(12.8	)	$	65.0		$	0.9		$	152.0
Other comprehensive income before reclassifications and income tax benefit (expense)	55.9			(3.2		)	—			4.2			56.9
Amounts reclassified from accumulated other comprehensive income	—			0.2			(0.7		)	—			(0.5		)
Income tax benefit (expense)	(1.5		)	1.1			0.3			(1.6		)	(1.7		)
Net current period other comprehensive income attributable to CME Group	54.4			(1.9		)	(0.4		)	2.6			54.7
Balance at June 30, 2014	$	153.3		$	(14.7	)	$	64.6		$	3.5		$	206.7

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Contingencies (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Loss Contingency [Abstract]
Accrued liability related to all outstanding legal matters	$ 3.5	$ 4.3

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Debt (Tables)

6 Months Ended

Jun. 30, 2015

Debt Disclosure [Abstract]

Schedule Of Short-Term And Long-Term Debt

Long-term debt consisted of the following at June 30, 2015 and December 31, 2014:

(in millions)	June 30, 2015		December 31, 2014
$612.5 million fixed rate notes due March 2018, stated rate of 4.40%(1)	$	—	$	611.0
$750.0 million fixed rate notes due September 2022, stated rate of 3.00% (2)	748.4		748.2
$750.0 million fixed rate notes due March 2025, stated rate of 3.00%(3)	743.9		—
$750.0 million fixed rates notes due September 2043, stated rate of 5.30% (4)	748.7		748.7
Total long-term debt	$	2,241.0	$	2,107.9

(1) In February 2010, 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 4.46%.

(2) 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%.

(3) 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%.

(4) 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 as of June 30, 2015:

(in millions)	Par Value
2016	$	—
2017	—
2018	—
2019	—
2020	—
Thereafter	2,250.0

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Intangible Assets And Goodwill (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of purchased intangibles	$ 25.0	$ 25.2	$ 49.9	$ 50.4

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Earnings Per Share Anti-Dilutive Securities (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	464	1,480	467	1,480
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	456	1,480	456	1,480
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	8	0	11	0

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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 265.0	$ 263.8	$ 595.4	$ 530.4
Other comprehensive income, net of tax
Net unrealized holding gains arising during the period	36.9	31.0	9.2	55.9
Reclassification adjustment for gains included in investment income	(6.0)	0.0	(6.0)	0.0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	1.2	(1.5)	1.2	(1.5)
Investment securities, net	32.1	29.5	4.4	54.4
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0.0	0.0	(0.3)	(3.2)
Amortization of net actuarial (gains) losses included in pension expense	0.7	0.1	1.4	0.2
Defined benefit plans, income tax benefit (expense)	(0.2)	(0.1)	(0.4)	1.1
Defined benefit plans, net	0.5	0.0	0.7	(1.9)
Net unrealized holding losses arising during the period	0.0	0.0	(4.7)	0.0
Loss on Cash Flow Hedge Ineffectiveness	0.0	0.0	1.8	0.0
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	(0.3)	(0.4)	(0.6)	(0.7)
Derivative instruments, income tax benefit (expense)	0.2	0.2	1.4	0.3
Derivative instruments, net	(0.1)	(0.2)	(2.1)	(0.4)
Foreign currency translation adjustment	(2.6)	1.8	(6.6)	4.2
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	1.0	(0.7)	2.5	(1.6)
Foreign currency translation, net	(1.6)	1.1	(4.1)	2.6
Other Comprehensive Income (Loss), Net of Tax	30.9	30.4	(1.1)	54.7
Comprehensive income	295.9	294.2	594.3	585.1
Less: comprehensive income attributable to redeemable non-controlling interest	0.0	0.0	0.0	(0.2)
Comprehensive income attributable to CME Group	$ 295.9	$ 294.2	$ 594.3	$ 585.3

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Performance Bonds and Guaranty Fund Contributions (Notes)

6 Months Ended

Jun. 30, 2015

Performance Bonds and Guaranty Fund Contributions [Abstract]

Performance Bonds and Guaranty Fund Contributions [Text Block]

Performance Bonds and Guaranty Fund Contributions

Performance Bonds and Guaranty Fund Contributions. At June 30, 2015, performance bonds and guaranty fund contribution assets on the consolidated balance sheets include cash and U.S. Treasury securities with maturity dates of 90 days or less. U.S. Treasury 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. At June 30, 2015, the amortized cost and fair value of the U.S. Treasury securities were both $17.6 billion. The U.S. Treasury securities will mature in the third quarter of 2015. 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 $2.5 billion at June 30, 2015.

Clearing House Contract Settlement. CME Clearing and CMECE mark-to-market open positions for all products at least once a day (twice a day for futures and options contracts). Based on values derived from the mark-to-market process, CME Clearing and CMECE require payment 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 over-the-counter 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 six months of 2015, CME Clearing and CMECE transferred an average of approximately $4.2 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 the guarantee exposure through initial and maintenance performance bond requirements and mandatory guaranty fund contributions. The company believes that the guarantee liability is immaterial and therefore has not recorded any liability at June 30, 2015.

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Intangible Assets And Goodwill (Components Of Intangible Assets) (Details) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets		$ 2,587.6	$ 2,637.4
Other Indefinite-lived Intangible Assets	[1]	17,175.3	17,175.3
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets		450.0	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	2,838.8
Accumulated amortization		(706.7)	(658.8)
Net book value		2,132.1	2,180.0
Technology-Related Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		29.4	29.4
Accumulated amortization		(25.4)	(23.5)
Net book value		4.0	5.9
Total Amortizable Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		2,870.6	2,870.6
Accumulated amortization		(733.0)	(683.2)
Net book value		2,137.6	2,187.4
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		2.4	2.4
Accumulated amortization		(0.9)	(0.9)
Net book value		$ 1.5	$ 1.5

[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

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Fair Value Measurements (Reconciliation Using Significant Unobservable Inputs) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Contingent consideration at Fair Value	$ 17.8
Fair Value, Inputs, Level 3 [Member]
Contingent consideration at Fair Value	17.8	$ 17.7
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Included in operating expense	$ 0.1

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Intangible Assets And Goodwill (Tables)

6 Months Ended

Jun. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Components of intangible assets

Intangible assets consisted of the following at June 30, 2015 and December 31, 2014:

	June 30, 2015							December 31, 2014
(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	$	(706.7	)	$	2,132.1	$	2,838.8	$	(658.8	)	$	2,180.0
Technology-related intellectual property	29.4		(25.4		)	4.0		29.4		(23.5		)	5.9
Other	2.4		(0.9		)	1.5		2.4		(0.9		)	1.5
Total amortizable intangible assets	$	2,870.6	$	(733.0	)	2,137.6		$	2,870.6	$	(683.2	)	2,187.4
Indefinite-Lived Intangible Assets:
Trade names						450.0							450.0
Total intangible assets – other, net						$	2,587.6						$	2,637.4
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

Future estimated amortization expense

As of June 30, 2015, the future estimated amortization expense related to amortizable intangible assets is expected to be as follows:

(in millions)	Amortization Expense
Remainder of 2015	$	49.7
2016	96.1
2017	95.5
2018	94.7
2019	94.7
2020	94.7
Thereafter	1,612.2