Nasdaq (NDAQ) 10-Q 5 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 28, 2014
Document Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'ndaq	'
Entity Registrant Name	'NASDAQ OMX GROUP, INC.	'
Entity Central Index Key	'0001120193	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	167,665,404

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Current assets:	'		'
Cash and cash equivalents	$286		$398
Restricted cash	27		84
Financial investments, at fair value	169	[1]	189	[1]
Receivables, net	370		393
Deferred tax assets	30		12
Default funds and margin deposits	2,513		1,961
Other current assets	162		126
Total current assets	3,557		3,163
Property and equipment, net	288		268
Non-current deferred tax assets	585		404
Goodwill	5,802		6,186
Intangible assets, net	2,213		2,386
Other non-current assets	247		170
Total assets	12,692		12,577
Current liabilities:	'		'
Accounts payable and accrued expenses	182		228
Section 31 fees payable to SEC	26		82
Accrued personnel costs	110		154
Deferred revenue	191		151
Other current liabilities	135		141
Deferred tax liabilities	37		38
Default funds and margin deposits	2,513		1,961
Current portion of debt obligations	'		45
Total current liabilities	3,194		2,800
Debt obligations	2,345		2,589
Non-current deferred tax liabilities	677		708
Non-current deferred revenue	221		143
Other non-current liabilities	137		153
Total liabilities	6,574		6,393
Commitments and contingencies	'		'
Nasdaq stockholders' equity:	'		'
Common stock, $0.01 par value, 300,000,000 shares authorized, shares issued: 217,212,427 at September 30, 2014 and 214,419,155 at December 31, 2013; shares outstanding: 168,481,184 at September 30, 2014 and 169,357,084 at December 31, 2013	2		2
Preferred stock, 30,000,000 shares authorized, series A convertible preferred stock: shares issued: none at September 30, 2014 and 1,600,000 at December 31, 2013; shares outstanding: none at September 30, 2014 and December 31, 2013	'		'
Additional paid-in capital	4,354		4,278
Common stock in treasury, at cost: 48,731,243 shares at September 30, 2014 and 45,062,071 shares at December 31, 2013	-1,145		-1,005
Accumulated other comprehensive loss	-325		-67
Retained earnings	3,231		2,976
Total NASDAQ OMX stockholders' equity	6,117		6,184
Noncontrolling interests	1		'
Total equity	6,118		6,184
Total liabilities and equity	$12,692		$12,577
[1]	As of September 30, 2014 and December 31, 2013, Level 1 financial investments, at fair value were primarily comprised of trading securities, mainly Swedish government debt securities. Of these securities, $156 million as of September 30, 2014 and $167 million as of December 31, 2013 are assets utilized to meet regulatory capital requirements, primarily for the clearing operations of Nasdaq Nordic Clearing.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]	'	'
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	217,212,427	214,419,155
Common stock, shares outstanding	168,481,184	169,357,084
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred stock, series A convertible preferred stock: shares issued	0	1,600,000
Preferred stock, series A convertible preferred stock: shares outstanding	0	0
Common stock in treasury	48,731,243	45,062,071

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:	'	'	'	'
Market Services	$515	$499	$1,640	$1,559
Listing Services	59	57	177	170
Information Services	114	117	360	329
Technology Solutions	130	132	403	304
Total revenues	818	805	2,580	2,362
Cost of revenues:	'	'	'	'
Transaction rebates	-236	-231	-771	-749
Brokerage, clearance and exchange fees	-85	-68	-260	-238
Total cost of revenues	-321	-299	-1,031	-987
Revenues less transaction rebates, brokerage, clearance and exchange fees	497	506	1,549	1,375
Operating expenses:	'	'	'	'
Compensation and benefits	136	150	439	394
Marketing and advertising	5	7	23	22
Depreciation and amortization	34	33	104	88
Professional and contract services	37	41	118	104
Computer operations and data communications	22	22	67	58
Occupancy	26	26	75	71
Regulatory	7	8	21	23
Merger and strategic initiatives	5	'	46	33
Restructuring and other charges	'	'	'	9
General, administrative and other	18	17	75	61
Voluntary accommodation program	'	'	'	62
Total operating expenses	290	304	968	925
Operating income	207	202	581	450
Interest income	1	2	4	7
Interest expense	-29	-32	-88	-81
Asset impairment charges	'	'	'	-10
Loss from unconsolidated investees, net	'	-1	'	-1
Income before income taxes	179	171	497	365
Income tax provision	56	58	170	122
Net income	123	113	327	243
Net loss attributable to noncontrolling interests	'	'	1	1
Net income attributable to Nasdaq	$123	$113	$328	$244
Per share information:	'	'	'	'
Basic earnings per share	$0.73	$0.68	$1.94	$1.46
Diluted earnings per share	$0.71	$0.66	$1.89	$1.43
Cash dividends declared per common share	$0.15	$0.13	$0.43	$0.39

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Consolidated Statements of Comprehensive Income (Loss) [Abstract]	'	'	'	'
Net income	$123	$113	$327	$243
Net unrealized holding gains (losses) on available-for-sale investment securities:	'	'	'	'
Net unrealized holding gains (losses) on available-for-sale investment securities	'	7	'	21
Foreign currency translation gains (losses):	'	'	'	'
Net foreign currency translaction gains (losses)	-287	147	-424	-5
Income tax benefit (expense)	104	-65	166	118
Total	-183	82	-258	113
Total other comprehensive income, net of tax	-183	89	-258	134
Comprehensive income	-60	202	69	377
Comprehensive loss attributable to noncontrolling interests	'	'	1	1
Comprehensive income attributable to Nasdaq	($60)	$202	$70	$378

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:	'	'
Net income	$327	$243
Adjustments to reconcile net income to cash provided by operating activities:	'	'
Depreciation and amortization	104	88
Share-based compensation	45	32
Excess tax benefits related to share-based compensation	-5	-11
Deferred income taxes	-19	-15
Noncash Merger Related Costs	20	'
Income Loss From Equity Method Investments	'	1
Asset retirements and impairment charges	'	10
Other non-cash items included in net income	18	11
Net change in operating assets and liabilities, net of effects of acquisitions:	'	'
Receivables, net	7	-36
Other assets	-20	3
Accounts payable and accrued expenses	-44	78
Section 31 fees payable to SEC	-56	-78
Accrued personnel costs	-40	'
Deferred revenue	67	13
Other liabilities	3	-1
Net cash provided by operating activities	407	337
Cash flows from investing activities:	'	'
Purchases of trading securities	-239	-300
Proceeds from sales and redemptions of trading securities	246	356
Purchases of available-for-sale investment securities	17	39
Proceeds from sales of available-for-sale investment securities	17	'
Purchase of equity and cost method investments	-17	-39
Acquisitions of businesses, net of cash and cash equivalents acquired	'	-1,121
Purchases of property and equipment	-93	-80
Other investment activities	-10	'
Net cash used in investing activities	-96	-1,184
Cash flows from financing activities:	'	'
Payments of debt obligations	-847	-191
Proceeds from debt obligations, net of debt issuance costs	612	895
Cash paid for repurchase of common stock	-121	-10
Cash dividends	-73	-65
Excess tax benefits related to share-based compensation	5	11
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	30	21
Proceeds From Stock Options Exercised	24	18
Payments related to employee shares withheld for taxes	-23	-4
Other financing activities	2	-1
Net cash provided by (used in) financing activities	-415	656
Effect of exchange rate changes on cash and cash equivalents	-8	-6
Net decrease in cash and cash equivalents	-112	-197
Cash and cash equivalents at beginning of period	398	497
Cash and cash equivalents at end of period	286	300
Cash paid for:	'	'
Interest	103	77
Income taxes, net of refund	147	105
Non-cash investing activities:	'	'
Transfer To Investments	75	'
Acquisition of eSpeed contingent future issuance of Nasdaq common stock	'	$484

Organization_and_Nature_of_Ope

Organization and Nature of Operations	9 Months Ended
	Sep. 30, 2014
Organization and Nature of Operations [Abstract]	'
Organization and Nature of Operations	'
	1. Organization and Nature of Operations
	We are a leading provider of trading, clearing, exchange technology, regulatory, securities listing, information and public company services across six continents. Our global offerings are diverse and include trading and clearing across multiple asset classes, access services, market data products, financial indexes, capital formation solutions, corporate solutions and market technology products and services. Our technology powers markets across the globe, supporting derivatives trading,  clearing and settlement, cash equity trading, fixed income trading and many other functions.
	We manage, operate and provide our products and services in four business segments: Market Services, Listing Services, Information Services and Technology Solutions.
	Market Services
	Our Market Services segment includes our derivative trading and clearing, cash equity trading, fixed income trading, and access and broker services businesses. We operate multiple exchanges and other marketplace facilities across several asset classes, including derivatives, commodities, cash equity, debt, structured products and ETFs. In addition, in some countries where we operate exchanges, we also provide broker services, clearing, settlement and central depository services. Our transaction-based platforms provide market participants with the ability to access, process, display and integrate orders and quotes for cash equity securities, derivatives and ETFs. The platforms allow the routing and execution of buy and sell orders as well as the reporting of transactions for cash equity securities, derivatives and ETFs, providing fee based revenues.
	In the U.S., we operate three cash equities exchanges, as well as three options exchanges. The NASDAQ Stock Market, the largest of our cash equities exchanges, is the largest single cash equities securities market in the U.S. in terms of the number of listed companies and in the world in terms of share value traded. We also operate a leading electronic platform for trading of U.S. Treasuries.
	In Europe, we operate exchanges in Stockholm (Sweden), Copenhagen (Denmark), Helsinki (Finland), and Iceland, as well as the clearing operations of NASDAQ OMX Clearing AB, as Nasdaq Nordic. We also operate exchanges in Tallinn (Estonia), Riga (Latvia) and Vilnius (Lithuania) as Nasdaq Baltic. Collectively, Nasdaq Nordic and Nasdaq Baltic offer trading in cash equities, bonds, structured products and ETFs, as well as trading and clearing of derivatives and clearing of resale and repurchase agreements. Through Nasdaq First North, our Nordic and Baltic operations also offer alternative marketplaces for smaller companies. We also operate Nasdaq Armenia.
	In addition, Nasdaq Commodities operates a power derivatives exchange regulated in Norway and a European carbon exchange. In the U.K., we operate Nasdaq NLX, a London-based market for trading of listed short-term and long-term European (Euro and Sterling denominated) interest rate derivative products.
	Listing Services
	Our Listing Services segment includes our U.S. and European Listing Services businesses. We operate a variety of listing platforms around the world to provide multiple global capital raising solutions for private and public companies. Our main listing markets are The NASDAQ Stock Market and the Nasdaq Nordic and Nasdaq Baltic exchanges. In March 2014, we launched NASDAQ Private Market, or NPM, a marketplace for private growth companies.
	As of September 30, 2014, The NASDAQ Stock Market was home to 2,746 listed companies with a combined market capitalization of approximately $7.6 trillion, and in Europe, the Nasdaq Nordic and Nasdaq Baltic exchanges, together with Nasdaq First North, were home to 778 listed companies with a combined market capitalization of approximately $1.3 trillion.
	Information Services
	Our Information Services segment includes our Market Data Products and our Index Licensing and Services businesses.
	Our Market Data Products business sells and distributes historical and real-time quote and trade information to market participants and data distributors. Our market data products enhance transparency of the market activity within the exchanges that we operate and provide critical information to financial professional and individual investors globally.
	Our Index Licensing and Services business develops and licenses Nasdaq branded indexes, associated derivatives, and financial products and also provides custom calculation services for third-party clients. We currently calculate and distribute over 41,000 indexes. We had $96  billion of assets under management in exchange traded products tracking Nasdaq indexes as of September 30, 2014.
	Technology Solutions
	Our Technology Solutions segment includes our Corporate Solutions and Market Technology businesses.
	Our Corporate Solutions business serves corporate clients, including companies listed on our exchanges. We help organizations manage the two-way flow of information with their key constituents, including their board members and public investors in their stock, and with clients and the public through our suite of advanced technology, analytics, and consultative services. In May 2013, we acquired from Thomson Reuters their Investor Relations, Public Relations and Multimedia Solutions businesses, or the TR Corporate businesses, which were integrated into our Corporate Solutions business. With the acquisition of the TR Corporate businesses, our Corporate Solutions business primarily offers products to serve the following key areas: investor relations, public relations, multimedia solutions, and governance. We currently have approximately 10,000 Corporate Solutions clients.
	Our Market Technology business is a leading global technology solutions provider and partner to exchanges, clearing organizations, central securities depositories, regulators, banks, brokers and corporate businesses. Our Market Technology business is the sales channel for our complete global offering to other marketplaces.
	Market Technology provides technology solutions for trading,  clearing, settlement, surveillance and information dissemination to markets with wide-ranging requirements, from the leading markets in the U.S., Europe and Asia to emerging markets in the Middle East, Latin America, and Africa. Our marketplace solutions can handle a wide array of assets including cash equities, equity derivatives, currencies, various interest-bearing securities, commodities, energy products and derivatives, and are currently powering more than 70 marketplaces in 50 countries. Market Technology also provides market surveillance services to broker-dealer firms worldwide, as well as enterprise governance, risk management and compliance software solutions.

Basis_of_Presentation_and_Prin

Basis of Presentation and Principles of Consolidation	9 Months Ended
	Sep. 30, 2014
Basis of Presentation and Principles of Consolidation [Abstract]	'
Basis of Presentation and Principles of Consolidation	'
	2. Basis of Presentation and Principles of Consolidation
	The condensed consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles, or U.S. GAAP. The condensed consolidated financial statements include the accounts of Nasdaq, its wholly-owned subsidiaries and other entities in which Nasdaq has a controlling financial interest. The accompanying unaudited condensed consolidated financial statements reflect all adjustments which are, in the opinion of management, necessary for a fair statement of the results for the interim periods presented. These adjustments are of a normal recurring nature. All significant intercompany accounts and transactions have been eliminated in consolidation.
	As permitted under U.S. GAAP, certain footnotes or other financial information can be condensed or omitted in the interim condensed consolidated financial statements. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and accompanying notes included in Nasdaq’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
	Certain prior period amounts have been reclassified to conform to the current period presentation.
	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and the disclosure of contingent amounts in the condensed consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
	We have evaluated subsequent events through the issuance date of this Quarterly Report on Form 10-Q.  See Note 17, “Subsequent Event,” for further discussion.
	Tax Matters
	We use the asset and liability method to determine income taxes on all transactions recorded in the condensed consolidated financial statements. Deferred tax assets and liabilities are determined based on differences between the financial statement carrying amounts and the tax basis of existing assets and liabilities (i.e., temporary differences) and are measured at the enacted rates that will be in effect when these differences are realized. If necessary, a valuation allowance is established to reduce deferred tax assets to the amount that is more likely than not to be realized.
	In order to recognize and measure our unrecognized tax benefits, management determines whether a tax position is more likely than not to be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. Once it is determined that a position meets the recognition thresholds, the position is measured to determine the amount of benefit to be recognized in the condensed consolidated financial statements. Interest and/or penalties related to income tax matters are recognized in income tax expense.
	As shown in the Condensed Consolidated Statements of Comprehensive Income, the income tax benefit in the first nine months of 2013 was impacted due to an assertion made by Nasdaq to permanently reinvest the earnings of certain foreign subsidiaries. As a result of this assertion, adjustments were made to our deferred tax balances relating to cumulative translation adjustments pertaining to these subsidiaries.
	Nasdaq’s income tax provision was $56 million in the third quarter of 2014 compared with $58 million in the third quarter of 2013 and $170 million in the first nine months of 2014 compared with $122 million in the first nine months of 2013. The overall effective tax rate was 31% in the third quarter of 2014, 34% in the third quarter of 2013 and first nine months of 2014 and 33% in the first nine months of 2013. The lower effective tax rate in the third quarter of 2014 when compared with the same period in 2013 is primarily due to adjustments related to prior year tax return liabilities which resulted in a decrease to the tax provision. In addition, in the third quarter of 2013 we recorded an increase in net deferred tax liabilities resulting from changes in tax rates in various jurisdictions. The higher effective tax rate for the first nine months of 2014 when compared with the same period in 2013 is primarily due to a gain recorded in 2013 associated with the remeasurement of a contingent purchase price liability related to the BWise acquisition which was exempt from taxation. The effective tax rate may vary from period to period depending on, among other factors, the geographic and business mix of earnings and losses. These same and other factors, including our history of pre-tax earnings and losses, are taken into account in assessing the ability to realize deferred tax assets.
	Nasdaq and its eligible subsidiaries file a consolidated U.S. federal income tax return and applicable state and local income tax returns and non-U.S. income tax returns. Federal income tax returns for the years 2007 through 2012 are currently under audit by the Internal Revenue Service and we are subject to examination for 2013. Several state tax returns are currently under examination by the respective tax authorities for the years 2005 through 2012 and we are subject to examination for 2013. Non-U.S. tax returns are subject to examination by the respective tax authorities for the years 2006 through 2013. We anticipate that the amount of unrecognized tax benefits at September 30, 2014 will significantly decrease in the next twelve months as we expect to settle certain tax audits. The final outcome of such audits cannot yet be determined. We anticipate that such adjustments will not have a material impact on our consolidated financial position or results of operations.
	In the fourth quarter of 2010, we received an appeal from the Finnish Tax Authority challenging certain interest expense deductions claimed by Nasdaq in Finland for the year 2008. The appeal also demanded certain penalties be paid with regard to the company’s tax return filing position. In October 2012, the Finnish Appeals Board disagreed with the company’s tax return filing position for the years 2009 through 2011, even though the tax return position with respect to this deduction was previously reviewed and approved by the Finnish Tax Authority. In June 2014, the Finnish Administrative Court also disagreed with the company’s tax return filing position. We have appealed this ruling to the Finnish Supreme Administrative Court and expect to receive a favorable decision. Through September 30, 2014, we have recorded tax benefits of $22 million associated with this filing position. Of this amount, we have paid $14 million to the Finnish tax authorities. We have also paid $11 million in interest and penalties. In 2014, we will pay $8 million, which represents the unpaid amounts for benefits taken in 2013 and the first nine months of 2014. We expect the Finnish Supreme Administrative Court to agree with our position, which would result in an expected refund to Nasdaq of $33 million.
	From 2009 through 2012, we recorded tax benefits associated with certain interest expense incurred in Sweden. Our position is supported by a 2011 ruling we received from the Swedish Supreme Administrative Court. However, under new legislation effective January 1, 2013, limitations are imposed on certain forms of interest expense. Because this legislation is unclear with regard to our ability to continue to claim such interest deductions, Nasdaq filed an application for an advance tax ruling with the Swedish Tax Council for Advance Tax Rulings. In June 2014, we received an unfavorable ruling from the Swedish Tax Council for Advance Tax Rulings. We have appealed this ruling to the Swedish Supreme Administrative Court and expect to receive a favorable decision. Since January 1, 2013, we have recorded tax benefits of $28 million, or $0.16 per diluted share, related to this matter. We expect to record recurring quarterly tax benefits of $4 million to $5 million with respect to this issue for the foreseeable future.
	In December 2012, the Swedish Tax Agency approved our 2010 amended value added tax, or VAT, tax return and we received a cash refund for the amount claimed. In 2013, we filed VAT tax returns for 2011 and 2012 and utilized the same approach which was approved for the 2010 filing. However, even though the VAT return position was previously reviewed and approved by the Swedish Tax Agency, we were informed by the Swedish Tax Agency that our VAT refund claims for 2011 and 2012 are not valid. However, they will not seek reimbursement of the 2010 refund. We have appealed the finding by the Swedish Tax Agency to the Administrative Court. For the period January 1, 2011 through September 30, 2014, we have recorded benefits of $16 million associated with this position.
	Recently Announced Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2014-09, “Revenue from Contracts with Customers (Topic 606),” which supersedes the revenue recognition guidance in Accounting Standards Codification, or ASC, 605, “Revenue Recognition.” The new revenue recognition standard sets forth a five-step revenue recognition model to determine when and how revenue is recognized. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration it expects to receive in exchange for those goods or services. The standard also requires more detailed disclosures. The standard provides alternative methods of initial adoption and is effective for us on January 1, 2017. Early adoption is not permitted. We are currently assessing the impact that this standard will have on our consolidated financial statements.
	In April 2014, the FASB issued ASU 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity,” which raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation.  Under the new guidance, only disposals representing a strategic shift in operations that have or will have a major effect on an entity’s operations and financial results should be presented as discontinued operations. This guidance is effective for us on January 1, 2015. Early adoption is permitted provided that the disposal was not previously disclosed. We will prospectively apply this new standard to applicable transactions.

Restructuring_Charges

Restructuring Charges	9 Months Ended
	Sep. 30, 2014
Restructuring Charges [Abstract]	'
Restructuring Charges	'
	3. Restructuring Charges
	During the first quarter of 2012, we performed a comprehensive review of our processes, organizations and systems in a company-wide effort to improve performance, cut costs, and reduce spending. This restructuring program was completed in the first quarter of 2013.
	The following table presents a summary of restructuring charges in the Condensed Consolidated Statements of Income for the nine months ended September 30, 2013:
		Nine Months Ended September 30,
		2013
		(in millions)
	Severance	$	6
	Facilities-related		1
	Asset impairments		1
	Other		1
	Total restructuring charges	$	9
	During the first nine months of 2013, we recognized restructuring charges totaling $9 million, including severance costs of $6 million related to workforce reductions of 31 positions across our organization, $1 million for facilities-related charges related to lease rent accruals for facilities we no longer occupy due to facilities consolidation, $1 million for asset impairments, primarily consisting of fixed assets and capitalized software that have been retired, and $1 million of other charges.
	Restructuring Reserve
	Severance
	The accrued severance balance was $3 million at December 31, 2013 and is included in other current liabilities in the Condensed Consolidated Balance Sheets. The accrued severance balance as of December 31, 2013 was paid during the first quarter of 2014.
	Facilities-related
	Facilities-related reserves are calculated using a present value of future minimum lease payments, offset by an estimate for future sublease income. The facilities-related reserve balance was $1 million at December 31, 2013. The majority of the facilities-related reserve balance as of December 31, 2013 was utilized during the first quarter of 2014.

Acquisitions_and_Divestitures

Acquisitions and Divestitures	9 Months Ended
	Sep. 30, 2014
Acquisitions [Abstract]	'
Acquisitions and Divestitures	'
	4. Acquisitions
	We completed the following acquisitions in 2014 and 2013. Financial results of each transaction are included in our Condensed Consolidated Statements of Income from the dates of each acquisition.
	2014 Acquisition
	On March 31, 2014, we completed the acquisition of the remaining 28% ownership interest in BWise Beheer B.V. and its subsidiaries, or BWise, a Netherlands-based service provider that offers enterprise governance, risk management and compliance software and services to help companies track, measure and manage key organizational risks. BWise is part of our Market Technology business within our Technology Solutions segment.
	2013 Acquisitions
		Purchase Consideration		Total Net Assets (Liabilities) Acquired		Purchased Intangible Assets		Goodwill
			(in millions)
	eSpeed	$	1,239	$	5	$	715	$	519
	TR Corporate businesses		366		-37		91		312
	Acquisition of eSpeed for Trading of U.S. Treasuries
	On  June 28, 2013, we acquired from BGC Partners, Inc. and certain of its affiliates, or BGC, certain assets and assumed certain liabilities, including 100% of the equity interests in eSpeed Technology Services, L.P., eSpeed Technology Services Holdings, LLC, Kleos Managed Services, L.P. and Kleos Managed Services Holdings, LLC; the eSpeed brand name; various assets comprising the fully electronic portion of BGC’s benchmark U.S. Treasury brokerage, market data and co-location service businesses, or eSpeed, for $1.2 billion.  We acquired net assets, at fair value, totaling $5 million and purchased intangible assets of $715 million, which consisted of $578 million for the eSpeed trade name, $121 million in customer relationships and $16 million in technology. The eSpeed businesses are part of our Market Services and Information Services segments.
	The purchase price consisted of $755 million in cash and contingent future annual issuances of 992,247 shares of Nasdaq common stock, which approximated certain tax benefits associated with the transaction of $484 million. Such contingent future issuances of Nasdaq common stock will be paid ratably through 2027 if Nasdaq’s total gross revenues equal or exceed $25 million in each such year.  The contingent future issuances of Nasdaq common stock are subject to anti-dilution protections and acceleration upon certain events.
	We finalized the allocation of the purchase price for eSpeed in the second quarter of 2014. There were no adjustments to the provisional values for this acquisition during 2014.
	Acquisition of the Investor Relations, Public Relations and Multimedia Solutions Businesses of Thomson Reuters
	On  May 31, 2013, we acquired the TR Corporate businesses, which provide insight, analytics and communications solutions, for $390 million  ($366 million cash paid plus $24 million in working capital adjustments).  We acquired net liabilities, at fair value, totaling $37 million and purchased intangible assets of $91 million, which consisted of $89 million in customer relationships and $2 million in technology. The TR Corporate businesses are part of our Corporate Solutions business within our Technology Solutions segment.
	We finalized the allocation of the purchase price for the TR Corporate businesses in the second quarter of 2014. There were no adjustments to the provisional values for this acquisition during 2014.
	In the first quarter of 2014, we performed a review of our legacy Corporate Solutions’ technology platforms in an effort to leverage our scale and expertise as well as improve the efficiencies that we deliver to our customers and reduce our costs. This review resulted in the consolidation and retirement of several technology platforms, resulting in a charge of $18 million in the first quarter of 2014. In addition, other merger costs of $28 million relating to our acquisition of the TR Corporate businesses were recorded in the first nine months of 2014. These charges are included in merger and strategic initiatives expense in the Condensed Consolidated Statements of Income.
	Formation of The NASDAQ Private Market Joint Venture
	In March 2013, we formed a joint venture with SharesPost, Inc. creating NPM, a marketplace for private growth companies. We own a majority interest in NPM, combining  Nasdaq’s resources, market and operating expertise with SharesPost’s web-based platform. NPM launched in March 2014 and is part of our U.S. Listing Services business within our Listing Services segment.
	We finalized the allocation of the purchase price for NPM in the first quarter of 2014. There were no adjustments to the provisional values for this acquisition during the first quarter of 2014.
	EMCF and EuroCCP Merger
	In December 2013, European Multilateral Clearing Facility N.V., or EMCF, merged with EuroCCP, creating EuroCCP N.V., a new combined clearinghouse. In connection with the merger, Nasdaq purchased an additional ownership interest in EuroCCP N.V. for an immaterial amount. Nasdaq previously had a 22% equity interest in EMCF and, upon completion of the merger, currently has a 25% equity interest in EuroCCP N.V. We account for our investment in EuroCCP N.V. under the equity method of accounting and this investment is part of our Market Services segment. See “Equity Method Investments,” of Note 6, “Investments,” for further discussion of our equity method investments.
	Acquisition of Dutch Cash Equities and Equity Derivatives Trading Venue
	In April 2013, we acquired a  25%  equity interest in The Order Machine, or TOM, a Dutch cash equities and equity derivatives trading venue, for an immaterial amount. The terms of the transaction also provide us an option to acquire an additional 25.1% of the remaining shares at a future date. This transaction expanded our derivatives presence in Europe and this investment is part of our Market Services segment. We account for our investment in TOM under the equity method of accounting. See “Equity Method Investments,” of Note 6, “Investments,” for further discussion of our equity method investments.
	Pro Forma Results and Acquisition-related Costs
	Pro forma financial results for the acquisitions completed in 2013 have not been presented since these acquisitions, both individually and in the aggregate, were not material to our financial results.
	Acquisition-related costs for the transactions described above were expensed as incurred and are included in merger and strategic initiatives expense in the Condensed Consolidated Statements of Income.

Goodwill_and_Purchased_Intangi

Goodwill and Purchased Intangible Assets	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Purchased Intangible Assets	'
	5. Goodwill and Purchased Intangible Assets
	Goodwill
	The following table presents the changes in goodwill by business segment during the nine months ended September  30, 2014:
		Market Services		Listing Services		Information Services		Technology Solutions		Total
		(in millions)
	Balance at December 31, 2013	$	3,433	$	136	$	2,019	$	598	$	6,186
	Goodwill acquired		-		-		-		-		-
	Foreign currency translation adjustment		-211		-7		-124		-42		-384
	Balance at September 30, 2014	$	3,222	$	129	$	1,895	$	556	$	5,802
	As of September  30, 2014, the amount of goodwill that is expected to be deductible for tax purposes in future periods is $869 million, of which $517 million is related to our acquisition of eSpeed and $284 million is related to our acquisition of the TR Corporate businesses.
	Goodwill represents the excess of the purchase price over the value assigned to the net tangible and identifiable intangible assets of a business acquired. Goodwill is allocated to our reporting units based on the assignment of the fair values of each reporting unit of the acquired company. We perform an annual goodwill impairment test during the fourth quarter of our fiscal year using carrying amounts as of October 1. Should certain events or indicators of impairment occur between annual impairment tests, we will perform the impairment test as those events or indicators occur. We assess goodwill impairment at the reporting unit level. There was no impairment of goodwill for the nine months ended September  30, 2014 and 2013, however, events such as economic weakness or unexpected significant declines in operating results of a reporting unit may result in goodwill impairment charges in the future.
	Purchased Intangible Assets
	The following table presents details of our total purchased intangible assets, both finite- and indefinite-lived:
		30-Sep-14								31-Dec-13
		Gross Amount		Accumulated Amortization		Net Amount		Weighted-Average Useful Life (in Years)		Gross Amount		Accumulated Amortization		Net Amount		Weighted-Average Useful Life (in Years)
		(in millions)								(in millions)
	Finite-Lived Intangible Assets
	Technology	$	37	$	-15	$	22		5	$	39	$	-12	$	27		5
	Customer relationships		1,047		-314		733		20		1,075		-292		783		19
	Other		5		-3		2		9		5		-3		2		8
	Foreign currency translation adjustment		-51		14		-37				3		-		3
	Total finite-lived intangible assets	$	1,038	$	-318	$	720			$	1,122	$	-307	$	815
	Indefinite-Lived Intangible Assets
	Exchange and clearing registrations	$	790	$	-	$	790			$	790	$	-	$	790
	Trade names		756		-		756				756		-		756
	Licenses		51		-		51				51		-		51
	Foreign currency translation adjustment		-104		-		-104				-26		-		-26
	Total indefinite-lived intangible assets	$	1,493	$	-	$	1,493			$	1,571	$	-	$	1,571
	Total intangible assets	$	2,531	$	-318	$	2,213			$	2,693	$	-307	$	2,386
	Amortization expense for purchased finite-lived intangible assets was $17 million for the three months ended September  30, 2014,  $18 million for the three months ended September  30, 2013,  $53 million for the nine months ended September 30, 2014, and $44 million for the nine months ended September 30, 2013.
	The estimated future amortization expense (excluding the impact of foreign currency translation adjustment) of purchased finite-lived intangible assets as of September  30, 2014 is as follows:
		(in millions)
	2014(1)	$	17
	2015		68
	2016		67
	2017		65
	2018		61
	2019 and thereafter		479
	Total	$	757
	(1)   Represents the estimated amortization to be recognized for the remaining three months of 2014.
	Intangible Asset Impairment Charges
	In the first quarter of 2013, we recorded non-cash intangible asset impairment charges totaling $10 million related to certain acquired intangible assets associated with customer relationships ($7 million) and a certain trade name ($3 million). These impairments resulted primarily from changes in the forecasted revenues associated with the acquired customer list of FTEN, Inc., or FTEN. The fair value of customer relationships was determined using the income approach, specifically the multi-period excess earnings method. The fair value of the trade name was determined using the income approach, specifically the relief from royalty method. These charges are recorded in asset impairment charges in the Condensed Consolidated Statements of Income for the nine months ended September  30, 2013. These impairment charges related to our Market Services segment.

Investments

Investments	9 Months Ended
	Sep. 30, 2014
Investments [Abstract]	'
Investments	'
	6. Investments
	Trading Securities
	Trading securities, which are included in financial investments, at fair value in the Condensed Consolidated Balance Sheets, were $169 million as of September  30, 2014 and $189 million as of December 31, 2013. These securities are primarily comprised of Swedish government debt securities, of which $156 million as of September  30, 2014 and $167  million as of December 31, 2013, are assets utilized to meet regulatory capital requirements primarily for our clearing operations at Nasdaq Nordic Clearing.
	Equity Method Investments
	The carrying amounts of our equity method investments totaled  $26 million as of September  30, 2014  and $30 million as of December 31, 2013 and are included in other non-current assets in the Condensed Consolidated Balance Sheets. As of September 30, 2014 and December 31, 2013, our equity method investments consisted primarily of our equity interests in EuroCCP N.V. and TOM. See “EMCF and EuroCCP Merger,” and “Acquisition of Dutch Cash Equities and Equity Derivatives Trading Venue,” of Note 4, “Acquisitions,” for further discussion.
	Income recognized from our equity interest in the earnings and losses of these equity method investments was immaterial for both the three and nine months ended September 30, 2014 and a net loss of $1 million for both the three and nine months ended September 30, 2013.
	Cost Method Investments
	The carrying amounts of our cost method investments totaled $140 million as of September 30, 2014 and are included in other non-current assets in the Condensed Consolidated Balance Sheets. As of September 30, 2014, our cost method investments represent our 5% ownership interest in Borsa Istanbul and our 5% ownership interest in LCH Clearnet Group Limited, or LCH. As of December 31, 2013, our cost method investment totaled $65 million and consisted of our 5% ownership interest in LCH. We account for these investments as cost method investments as we do not control and do not exercise significant influence over Borsa Istanbul or LCH and there is no readily determinable fair value of these shares since they are not publicly traded.
	The Borsa Istanbul shares, which were issued to us in the first quarter of 2014, are part of the consideration to be received under a market technology agreement. This investment has a cost basis of $75 million which is guaranteed to us via a put option negotiated as part of the market technology agreement.

Deferred_Revenue

Deferred Revenue	9 Months Ended
	Sep. 30, 2014
Deferred Revenue [Abstract]	'
Deferred Revenue	'
	7. Deferred Revenue
	Deferred revenue represents consideration received that is yet to be recognized as revenue. At September 30, 2014, we estimate that our deferred revenue, which is primarily Listing Services and Technology Solutions revenues, will be recognized in the following years:
		Initial Listing Revenues		Listing of Additional Shares Revenues		Annual Renewal and Other Revenues		Technology Solutions Revenues(2)		Total
		(in millions)
	Fiscal year ended:
	2014(1)	$	4	$	9	$	54	$	46	$	113
	2015		14		32		2		48		96
	2016		11		23		1		29		64
	2017		9		14		-		35		58
	2018		7		3		-		37		47
	2019 and thereafter		6		-		-		28		34
		$	51	$	81	$	57	$	223	$	412
	(1)   Represents deferred revenue that is anticipated to be recognized over the remaining three months of 2014.
	(2)   The timing of recognition of our deferred Technology Solutions revenues is primarily dependent upon the completion of customization and any significant modifications made pursuant to existing Market Technology contracts and the timing of Corporate Solutions subscription-based contracts. As such, as it relates to Market Technology revenues, the timing represents our best estimate.
	The changes in our deferred revenue during the nine months ended September  30, 2014 and 2013 are reflected in the following table.
		Initial Listing Revenues		Listing of Additional Shares Revenues		Annual Renewal and Other Revenues		Technology Solutions Revenues(2)		Total
		(in millions)
	Balance at January 1, 2014	$	41	$	75	$	20	$	158	$	294
	Additions(1)		20		36		214		463		733
	Amortization(1)		-10		-30		-175		-381		-596
	Translation adjustment		-		-		-2		-17		-19
	Balance at September 30, 2014	$	51	$	81	$	57	$	223	$	412
	Balance at January 1, 2013	$	36	$	78	$	32	$	149	$	295
	Additions(1)		12		28		215		156		411
	Amortization(1)		-10		-30		-177		-155		-372
	Translation adjustment		-		-		-6		11		5
	Balance at September 30, 2013	$	38	$	76	$	64	$	161	$	339
	(1) The additions and amortization for initial listing revenues, listing of additional shares revenues and annual renewal and other revenues primarily reflect revenues from our U.S. Listing Services business. The additions to Technology Solutions revenues during the nine months ended September 30, 2014 include $75 million related to the Borsa Istanbul market technology agreement.  See “Cost Method Investments,” of Note 6, “Investments,” for further discussion.
	(2)       Technology Solutions deferred revenues primarily include revenues from our Market Technology delivered client contracts in the support phase charged during the period and our Corporate Solutions subscription based contracts, which are primarily billed quarterly in advance.  For our Market Technology contracts, where customization and significant modifications to the software are made to meet the needs of our customers, total revenues, as well as costs incurred, are deferred until significant modifications are completed and delivered. Once delivered, deferred revenue and the related deferred costs are recognized over the post contract support period. For these Market Technology contracts, we have included the deferral of costs in other current assets and other non-current assets in the Condensed Consolidated Balance Sheets. The amortization of Technology Solutions deferred revenue primarily includes revenues earned from Market Technology client contracts and Corporate Solutions subscription based contracts recognized during the period.

Debt_Obligations

Debt Obligations	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt Obligations	'
	8. Debt Obligations
	The following table presents the changes in the carrying amount of our debt obligations during the nine months ended September 30, 2014:
		31-Dec-13		Additions		Payments, Accretion and Other		30-Sep-14
		(in millions)
	4.00% senior unsecured notes repaid June 18, 2014(1)	$	400	$	-	$	-400	$	-
	5.55% senior unsecured notes due January 15, 2020 (net of discount)(1)		598		-		1		599
	5.25% senior unsecured notes due January 16, 2018 (net of discount)(1)		368		-		-		368
	3.875% senior unsecured notes due June 7, 2021 (net of discount)(1)		824		-		-67		757
	4.25% senior unsecured notes due June 1, 2024 (net of discount)(1)		-		498		-		498
	$1.2 billion senior unsecured five-year credit facility(2):
	$450 million senior unsecured term loan facility credit agreement due September 19, 2016 (average interest rate of 1.53% for the period January 1, 2014 through September 30, 2014)		349		-		-226		123
	$750 million revolving credit commitment due September 19, 2016 (average interest rate of 1.33% for the period January 1, 2014 through September 30, 2014)		95		118		-213		-
	Total debt obligations		2,634		616		-905		2,345
	Less current portion		-45		-		45		-
	Total long-term debt obligations	$	2,589	$	616	$	-860	$	2,345
	(1) See “Senior Unsecured Notes” below for further discussion.
	(2) See “2011 Credit Facility” below for further discussion.
	Senior Unsecured Notes
	4.00% and 5.55% Senior Unsecured Notes
	In January 2010, Nasdaq issued $1 billion of senior unsecured notes, or the Notes. The Notes were issued at a discount in two separate series consisting of $400 million aggregate principal amount of 4.00% senior notes due 2015, or the 2015 Notes, and $600 million aggregate principal amount of 5.55% senior notes due 2020, or the 2020 Notes. As a result of the discount, the proceeds received from the issuance were less than the aggregate principal amounts. We repaid the outstanding balance on the 2015 Notes in June 2014. See “Early Extinguishment of 2015 Notes” below for further discussion.
	Early Extinguishment of 2015 Notes
	In May 2014, Nasdaq issued $500 million of 4.25% senior unsecured notes due June 1, 2024, or the 2024 Notes. In June 2014, we used the majority of the net proceeds from the 2024 Notes, along with cash on hand, to repay in full and terminate our 2015 Notes and repay a portion of the term loan under our senior credit facility. See “4.25% Senior Unsecured Notes” and “2011 Credit Facility” below for further discussion. In connection with the early extinguishment of the 2015 Notes, we recorded a pre-tax charge of $9 million which is included in general, administrative and other expense in the Condensed Consolidated Statements of Income for the nine months ended September 30, 2014.
	2020 Notes
	As of September 30, 2014, the balance of $599 million for the 2020 Notes reflects the aggregate principal amount, less the unamortized debt discount. The unamortized debt discount will be accreted through interest expense over the life of the 2020 Notes.
	The 2020 Notes pay interest semiannually at a rate of 5.55% per annum until January 15, 2020. The 2020 Notes are general unsecured obligations of ours and rank equally with all of our existing and future unsubordinated obligations. The 2020 Notes are not guaranteed by any of our subsidiaries and were issued under indentures that, among other things, limit our ability to consolidate, merge or sell all or substantially all of our assets, create liens, and enter into sale and leaseback transactions.
	Debt Issuance Costs
	We incurred debt issuance and other costs of $5 million in connection with the issuance of the 2020 Notes. These costs, which are capitalized and included in other non-current assets in the Condensed Consolidated Balance Sheets, are being amortized over the life of this debt obligation. Amortization expense, which is recorded as additional interest expense for these costs, was immaterial for both the three and nine months ended September 30, 2014 and 2013.
	5.25% Senior Unsecured Notes
	In December 2010, Nasdaq issued $370 million of 5.25% senior unsecured notes due January 16, 2018, or the 2018 Notes. The 2018 Notes were issued at a discount. As a result of the discount, the proceeds received from the issuance were less than the aggregate principal amount. As of September 30, 2014, the balance of $368 million reflects the aggregate principal amount, less the unamortized debt discount. The unamortized debt discount will be accreted through interest expense over the life of the 2018 Notes.
	The 2018 Notes pay interest semiannually at a rate of 5.25% per annum until January 16, 2018 and such rate may vary with Nasdaq’s debt rating up to a rate not to exceed 7.25%. The 2018 Notes are general unsecured obligations of ours and rank equally with all of our existing and future unsubordinated obligations. They are not guaranteed by any of our subsidiaries. The 2018 Notes were issued under indentures that among other things, limit our ability to consolidate, merge or sell all or substantially all of our assets, create liens, and enter into sale and leaseback transactions. In addition, upon a change of control triggering event (as defined in the indenture), the terms require us to repurchase all or part of each holder’s notes for cash equal to 101% of the aggregate principal amount purchased plus accrued and unpaid interest, if any.
	Debt Issuance Costs
	We incurred debt issuance and other costs of $3 million in connection with the issuance of the 2018 Notes. These costs, which are capitalized and included in other non-current assets in the Condensed Consolidated Balance Sheets, are being amortized over the life of this debt obligation. Amortization expense, which is recorded as additional interest expense for these costs, was immaterial for both the three and nine months ended September 30, 2014 and 2013.
	3.875% Senior Unsecured Notes
	In June 2013, Nasdaq issued €600 million aggregate principal amount of 3.875% senior unsecured notes due June 2021, or the 2021 Notes, at a discount. As a result of the discount, the proceeds received from the issuance were less than the aggregate principal amount. As of September 30, 2014, the balance of $757 million reflects the aggregate principal amount, less the unamortized debt discount. The unamortized debt discount will be accreted through interest expense over the life of the 2021 Notes.
	The 2021 Notes pay interest annually at a rate of 3.875% per annum until June 7, 2021 and such rate may vary with Nasdaq’s debt rating up to a rate not to exceed 5.875%. The 2021 Notes are general unsecured obligations of ours and rank equally with all of our existing and future unsubordinated obligations. They are not guaranteed by any of our subsidiaries. The 2021 Notes were issued under indentures that among other things, limit our ability to consolidate, merge or sell all or substantially all of our assets, create liens, and enter into sale and leaseback transactions. In addition, upon a change of control triggering event (as defined in the indenture), the terms require us to repurchase all or part of each holder’s notes for cash equal to 101% of the aggregate principal amount purchased plus accrued and unpaid interest, if any.
	The 2021 Notes have been designated as a hedge of our net investment in certain foreign subsidiaries to mitigate the foreign exchange risk associated with certain investments in these subsidiaries. The decrease in the carrying amount of  $67 million for the nine months ended September 30, 2014 reflects the translation of the 2021 Notes into U.S. dollars and is recorded in accumulated other comprehensive loss.
	We used the majority of the net proceeds from the offering of the 2021 Notes to fund the cash consideration payable by us for the acquisition of eSpeed and related expenses. We used the remaining proceeds for general corporate purposes. See “Acquisition of eSpeed for Trading of U.S. Treasuries,” of Note 4, “Acquisitions,” for further discussion of our acquisition of eSpeed.
	Debt Issuance Costs
	We incurred debt issuance and other costs of $7 million in connection with the issuance of the 2021 Notes. These costs, which are capitalized and included in other non-current assets in the Condensed Consolidated Balance Sheets, are being amortized over the life of this debt obligation. Amortization expense, which is recorded as additional interest expense for these costs, was immaterial for both the three and nine months ended September 30, 2014 and 2013.
	4.25% Senior Unsecured Notes
	As discussed above in “Early Extinguishment of 2015 Notes,” in May 2014, Nasdaq issued the 2024 Notes. The 2024 Notes were issued at a discount. As a result of the discount, the proceeds received from the issuance were less than the aggregate principal amount. As of September 30, 2014, the balance of $498 million reflects the aggregate principal amount, less the unamortized debt discount. The unamortized debt discount will be accreted through interest expense over the life of the 2024 Notes.
	The 2024 Notes pay interest semiannually at a rate of 4.25% per annum until June 1, 2024 and such rate may vary with Nasdaq’s debt rating up to a rate not to exceed 6.25%. The 2024 Notes are general unsecured obligations of ours and rank equally with all of our existing and future unsubordinated obligations. They are not guaranteed by any of our subsidiaries. The 2024 Notes were issued under indentures that among other things, limit our ability to consolidate, merge or sell all or substantially all of our assets, create liens, and enter into sale and leaseback transactions. In addition, upon a change of control triggering event (as defined in the indenture), the terms require us to repurchase all or part of each holder’s notes for cash equal to 101% of the aggregate principal amount purchased plus accrued and unpaid interest, if any.
	We used the majority of the net proceeds from the offering of the 2024 Notes, along with cash on hand, to repay in full and terminate our 2015 Notes and repay a portion of the term loan under our senior credit facility. See “Early Extinguishment of 2015 Notes” above and “2011 Credit Facility” below for further discussion.
	Debt Issuance Costs
	We incurred debt issuance and other costs of $4 million in connection with the issuance of the 2024 Notes. These costs, which are capitalized and included in other non-current assets in the Condensed Consolidated Balance Sheets, are being amortized over the life of this debt obligation. Amortization expense, which is recorded as additional interest expense for these costs, was immaterial for both the three and nine months ended September 30, 2014.
	Credit Facilities
	2011 Credit Facility
	In September 2011, Nasdaq entered into a $1.2 billion senior unsecured five-year credit facility which matures on September 19, 2016, or the 2011 Credit Facility. The 2011 Credit Facility consists of a $450 million funded term loan, or the 2016 Term Loan, and a $750 million revolving credit commitment (including a swingline facility and letter of credit facility). Nasdaq applied the $450 million in proceeds from the 2016 Term Loan to repay in full the remaining $450 million principal amount outstanding on our former credit facility. Under the 2011 Credit Facility, we are required to pay quarterly principal payments equal to 2.50% of the original aggregate principal amount borrowed under the 2016 Term Loan. In the first nine months of 2014, we made payments of $226 million consisting of a required quarterly principal payment of $22 million and an optional prepayment of $204 million on our 2016 Term Loan, reflecting all mandatory principal payments required until maturity in September 2016. We utilized cash on hand and borrowings from our 2024 Notes to pay the required payment and optional prepayment. See “4.25% Senior Unsecured Notes” above for further discussion.
	In the first nine months of 2014, we borrowed $118 million under the revolving credit commitment and utilized the proceeds for general corporate purposes. During the first nine months of 2014, we repaid the total amount drawn on the revolving credit commitment of $213  million. As of September 30, 2014, availability under the revolving credit commitment was $750 million.
	The loans under the 2011 Credit Facility have a variable interest rate based on either the London Interbank Offered Rate, or LIBOR, or the Federal Funds Rate, plus an applicable margin that varies with Nasdaq’s debt rating.
	The 2011 Credit Facility contains financial and operating covenants. Financial covenants include an interest expense coverage ratio and a maximum leverage ratio. Operating covenants include limitations on Nasdaq’s ability to incur additional indebtedness, grant liens on assets, enter into affiliate transactions and pay dividends. Our credit facilities allow us to pay cash dividends on our common stock as long as certain leverage ratios are maintained. The 2011 Credit Facility also contains customary affirmative covenants, including access to financial statements, notice of defaults and certain other material events, maintenance of business and insurance, and events of default, including cross-defaults to our material indebtedness.
	Nasdaq is permitted to repay borrowings under the 2011 Credit Facility at any time in whole or in part, without penalty. We are also required to repay loans outstanding under the 2011 Credit Facility with net cash proceeds from sales of property and assets of Nasdaq and its subsidiaries (excluding inventory sales and other sales in the ordinary course of business) and casualty and condemnation proceeds, in each case subject to specified exceptions and thresholds.
	Debt Issuance Costs
	We incurred debt issuance and other costs of $5 million in connection with the entry into the 2011 Credit Facility. These costs, which are capitalized and included in other non-current assets in the Condensed Consolidated Balance Sheets, are being amortized over the life of the 2011 Credit Facility. Amortization expense, which is recorded as additional interest expense for these costs, was immaterial for both the three and nine months ended September 30, 2014 and 2013.
	Other Credit Facilities
	In addition to the revolving credit commitment under our 2011 Credit Facility discussed above, we have credit facilities related to our Nordic clearing operations in order to provide further liquidity and default protection. At September 30, 2014, these credit facilities, which are available in multiple currencies, primarily Swedish Krona, totaled $253 million ($211 million in available liquidity and $42 million for default protection), none of which was utilized. At December 31, 2013, these facilities totaled $312 million ($219 million in available liquidity and $93 million for default protection), of which $11 million was utilized.
	Debt Covenants
	At September 30, 2014, we were in compliance with the covenants of all of our debt obligations.

Employee_Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefits	'
	9. Employee Benefits
	U.S. Defined-Benefit Pension and Supplemental Executive Retirement Plans
	We maintain non-contributory, defined-benefit pension plans, non-qualified supplemental executive retirement plans, or SERPs, for certain senior executives and post-retirement benefit plans for eligible employees in the U.S., collectively referred to as the Nasdaq Benefit Plans.
	Our pension plans and SERPs are frozen. Future service and salary for all participants do not count toward an accrual of benefits under the pension plans and SERPs.
	Components of Net Periodic Benefit Cost
	The following table sets forth the components of net periodic pension, SERP and post-retirement benefits costs for the Nasdaq Benefit Plans recognized in compensation and benefits expense in the Condensed Consolidated Statements of Income:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
		(in millions)
	Components of net periodic benefit cost
	Interest cost	$	1	$	1	$	4	$	4
	Expected return on plan assets		-1		-1		-4		-4
	Recognized net actuarial loss		-		1		1		3
	Curtailment loss		-		-		-		1
	Net periodic benefit cost	$	-	$	1	$	1	$	4
	Non-U.S. Benefit Plans
	Most employees outside the U.S. are covered by local retirement plans or by applicable social laws. Benefits under social laws are generally expensed in the periods in which the costs are incurred. These costs are included in compensation and benefits expense in the Condensed Consolidated Statements of Income and were $5 million for both the three months ended September 30, 2014 and 2013, $15 million for the nine months ended September 30, 2014 and $14 million for the nine months ended September 30, 2013.
	U.S. Defined Contribution Savings Plan
	We sponsor a voluntary defined contribution savings plan, or 401(k) Plan, for U.S. employees. Employees are immediately eligible to make contributions to the plan and are also eligible for an employer contribution match at an amount equal to 100.0% of the first 6.0% of eligible employee contributions in 2014 and the first 4.0% of eligible employee contributions in 2013. Savings plan expense included in compensation and benefits expense in the Condensed Consolidated Statements of Income was $2 million for both the three months ended September 30, 2014 and 2013,  $7 million for the nine months ended September 30, 2014, and $4 million for the nine months ended September 30, 2013.
	We have a profit-sharing contribution feature to our 401(k) Plan which allows eligible U.S. employees to receive employer retirement contributions, or ERCs, when we meet our annual corporate goals. In addition, we have a supplemental ERC for select highly compensated employees whose ERCs are limited by the annual Internal Revenue Service compensation limit. ERC expense recorded in compensation and benefits expense in the Condensed Consolidated Statements of Income was $1 million for the three months ended September 30, 2014, $3 million for the three months ended September 30, 2013, $2 million for the nine months ended September 30, 2014, and $4 million for the nine months ended September 30, 2013.
	In December 2013, we announced changes to the ERC program. In 2014, we reduced the basic ERC contribution for all plan participants and, effective January 1, 2015, the ERC plan will be discontinued and no future contributions will be made.
	Employee Stock Purchase Plan
	We have an employee stock purchase plan, or ESPP, under which approximately 2.9 million shares of our common stock have been reserved for future issuance as of September 30, 2014.
	Our ESPP allows eligible U.S. and non-U.S. employees to purchase a limited number of shares of our common stock at six-month intervals, called offering periods, at 85.0% of the lower of the fair market value on the first or the last day of each offering period. The 15.0% discount given to our employees is included in compensation and benefits expense in the Condensed Consolidated Statements of Income and was $1 million for both the three months ended September 30, 2014 and 2013, $3 million for the nine months ended September 30, 2014 and $2 million for the nine months ended September 30, 2013.

ShareBased_Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2014
Share-Based Compensation [Abstract]	'
Share-Based Compensation	'
	10. Share-Based Compensation
	We have a share-based compensation program that provides our board of directors broad discretion in creating employee equity incentives. Share-based awards, or equity awards, granted under this program include stock options, restricted stock (consisting of restricted stock units), and performance share units, or PSUs. Grants of equity awards are designed to reward employees for their long-term contributions and provide incentives for them to remain with us. For accounting purposes, we consider PSUs to be a form of restricted stock.
	Restricted stock is generally time-based and vests over three- to five-year periods beginning on the date of the grant. Stock options are also generally time-based and expire ten years from the grant date. Stock option and restricted stock awards granted prior to 2014 generally included performance-based accelerated vesting features based on achievement of specific levels of corporate performance. If Nasdaq exceeded the applicable performance parameters, the grants vest on the third anniversary of the grant date, if Nasdaq meets the applicable performance parameters, the grants vest on the fourth anniversary of the grant date, and if Nasdaq does not meet the applicable performance parameters, the grants vest on the fifth anniversary of the grant date. Beginning in 2014, restricted stock awards granted vest 25% on the second anniversary of the grant date, 25% on the third anniversary of the grant date, and 50% on the fourth anniversary of the grant date.
	PSUs are based on performance measures that impact the amount of shares that each recipient will receive upon vesting. PSUs are granted at the fair market value of our stock on the grant date and compensation cost is recognized over the performance period and, in certain cases, an additional vesting period. For each grant of PSUs, an employee may receive from 0% to 150% of the target amount granted, depending on the achievement of performance measures. We report the target number of PSUs granted, unless we have determined that it is more likely than not, based on the actual achievement of performance measures, that an employee will receive a different amount of shares underlying the PSUs, in which case we report the amount of shares the employee is likely to receive.
	We also have a performance-based long-term incentive program for our chief executive officer, presidents, executive vice presidents and senior vice presidents that focuses on total shareholder return, or TSR. This program represents 100% of our chief executive officer’s, presidents’ and executive vice presidents’ long-term stock-based compensation and 50% of our senior vice presidents’ long-term stock-based compensation. Under the program, each individual receives PSUs with a three-year cumulative performance period that vest at the end of the performance period. Performance will be determined by comparing Nasdaq’s TSR to two peer groups, each weighted 50%. The first peer group consists of exchange companies, and the second peer group consists of all companies in the Standard & Poor’s 500 Index, or S&P 500. Nasdaq’s relative performance ranking against each of these groups will determine the final number of shares delivered to each individual under the program. The payout under this program will be between 0% and 200% of the number of PSUs granted and will be determined by Nasdaq’s overall performance against both peer groups. However, if Nasdaq’s TSR is negative for the three-year performance period, regardless of TSR ranking, the payout will not exceed 100% of the number of PSUs granted. We estimate the fair value of PSU’s granted under the TSR program using the Monte Carlo simulation model, as these awards contain a market condition. The following weighted-average assumptions were used to determine the weighted-average fair value of the PSU awards granted under the TSR program for the nine months ended September 30, 2014:
		Nine Months Ended September 30,
		2014
	Weighted-average risk free interest rate		0.78%
	Expected volatility(1)		28.4%
	Weighted-average fair value at grant date	$	42.80
	(1)   We use historic volatility for PSU awards issued under the TSR program, as implied volatility cannot be used when simulating multivariate prices for companies in the S&P 500.
	Summary of 2014 Equity Awards
	In March 2014, we granted restricted stock to most active employees. During the first nine months of 2014, certain officers received grants of 818,307 PSUs. Of these PSUs granted, 553,846 units are subject to the performance measures and vesting schedules of the TSR program as discussed above, and the remaining 264,461 units are subject to a one-year performance period and generally vest ratably on an annual basis from December 31, 2015 through December 31, 2017. See “Summary of Restricted Stock and PSU Activity” below for further discussion.
	During 2013, certain grants of PSUs with a one-year performance period exceeded the applicable performance parameters. As a result, an additional 64,330 units were considered granted in the first quarter of 2014.
	Common Shares Available Under Our Equity Plan
	As of September 30, 2014, we had approximately 7.3 million shares of common stock authorized for future issuance pursuant to Nasdaq’s Equity Incentive Plan.
	Summary of Share-Based Compensation Expense
	The following table shows the total share-based compensation expense resulting from equity awards and the 15.0% discount for the ESPP for the three and nine months ended September 30, 2014 and 2013 in the Condensed Consolidated Statements of Income:
		Three Months Ended September 30,					Nine Months Ended September 30,
		2014			2013		2014			2013
		(in millions)
	Share-based compensation expense before income taxes	$	15		$	14	$	45		$	32
	Income tax benefit		-6			-6		-19			-13
	Share-based compensation expense after income taxes	$	9		$	8	$	26		$	19
	We estimated the fair value of stock option awards using the Black-Scholes valuation model. No stock option awards were granted during the three and nine months ended September 30, 2014 or 2013.
	Summary of Stock Option Activity
	A summary of stock option activity for the nine months ended September  30, 2014 is as follows:
		Number of Stock Options(1)			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term			Aggregate Intrinsic Value
							(in years)			(in millions)
	Outstanding at January 1, 2014		4,926,522		$	25.21		4.97		$	73
	Exercised		-1,222,139			19.92
	Forfeited or expired		-31,464			24.24
	Outstanding at September 30, 2014		3,672,919		$	26.98		4.13		$	57
	Exercisable at September 30, 2014		3,662,897		$	27.00		4.12		$	57
	(1)  No stock option awards were granted during the three and nine months ended September 30, 2014.
	We received net cash proceeds of $11 million from the exercise of 527,225 stock options for the three months ended September 30, 2014 and received net cash proceeds of $24 million from the exercise of 1,222,139 stock options for the nine months ended September 30, 2014. We received net cash proceeds of $2 million from the exercise of 171,458 stock options for the three months ended September 30, 2013 and received net cash proceeds of $18 million from the exercise of 1,730,647 stock options for the nine months ended September 30, 2013. We present excess tax benefits from the exercise of stock options, if any, as financing cash flows.
	The aggregate intrinsic value in the above table represents the total pre-tax intrinsic value (i.e., the difference between our closing stock price on September 30, 2014 of $42.42 and the exercise price, times the number of shares) based on stock options with an exercise price less than Nasdaq’s closing price of $42.42 as of  September 30, 2014, which would have been received by the option holders had the option holders exercised their stock options on that date. This amount can change based on the fair market value of our common stock. The total number of in-the-money stock options exercisable as of September 30, 2014 was 3.6 million.
	As of September 30, 2013,  3.8 million outstanding stock options were exercisable and the weighted-average exercise price was $25.06.
	Total fair value of stock options vested was immaterial for both the three months ended September 30, 2014 and 2013, $11 million for the nine months ended September 30, 2014 and immaterial for the nine months ended September 30, 2013. The total pre-tax intrinsic value of stock options exercised was $11 million for the three months ended September 30, 2014, $3 million for the three months ended September 30, 2013, $24 million for the nine months ended September 30, 2014 and $36 million for the nine months ended September 30, 2013.
	At September 30, 2014,  total unrecognized compensation cost related to stock options was immaterial.
	Summary of Restricted Stock and PSU Activity
	The following table summarizes our restricted stock and PSU activity for the nine months ended September 30, 2014:
		Restricted Stock					PSUs
		Number of Awards			Weighted-Average Grant Date Fair Value		Number of Awards			Weighted-Average Grant Date Fair Value
	Unvested balances at January 1, 2014		3,826,470		$	25.96		1,915,601		$	30.03
	Granted		1,194,225	-1		36.86		882,637	-2		40.34
	Vested		-1,513,633			23.28		-56,659			25.28
	Forfeited		-236,798			29.56		-131,536			28.53
	Unvested balances at September 30, 2014		3,270,264		$	30.94		2,610,043		$	33.70
	(1)   Primarily reflects our company-wide equity grant issued in March 2014, as discussed above.
	(2) PSUs granted in 2014 reflect awards issued to certain officers, as described above.
	At September 30, 2014,  $101 million of total unrecognized compensation cost related to restricted stock and PSUs is expected to be recognized over a weighted-average period of 1.7 years.

NASDAQ_OMX_Stockholders_Equity

NASDAQ OMX Stockholders' Equity	9 Months Ended
	Sep. 30, 2014
Nasdaq Stockholders' Equity [Abstract]	'
NASDAQ OMX Stockholders' Equity	'
	11. Nasdaq Stockholders’ Equity
	Common Stock
	At September 30, 2014,  300,000,000 shares of our common stock were authorized,  217,212,427 shares were issued and 168,481,184 shares were outstanding. The holders of common stock are entitled to one vote per share, except that our certificate of incorporation limits the ability of any person to vote in excess of 5.0% of the then-outstanding shares of Nasdaq common stock. This limitation does not apply to persons exempted from this limitation by our board of directors prior to the time such person owns more than 5.0% of the then-outstanding shares of Nasdaq common stock.
	Common Stock in Treasury, at Cost
	We account for the purchase of treasury stock under the cost method with the shares of stock repurchased reflected as a reduction to Nasdaq stockholders’ equity and included in common stock in treasury, at cost in the Condensed Consolidated Balance Sheets. When treasury shares are reissued, they are recorded at the average cost of the treasury shares acquired. We held 48,731,243 shares of common stock in treasury as of September 30, 2014 and 45,062,071 shares as of December 31, 2013.
	Share Repurchase Program
	In the third quarter of 2012, our board of directors authorized the repurchase of up to $300 million of our outstanding common stock. These purchases may be made from time to time at prevailing market prices in open market purchases, privately-negotiated transactions, block purchase techniques or otherwise, as determined by our management. The purchases are funded from existing cash balances. The share repurchase program may be suspended, modified or discontinued at any time. During the first nine months of 2014, we repurchased 3,220,529 shares of our common stock at an average price of $37.47, for an aggregate purchase price of $121 million. During the first nine months of 2013, we repurchased 321,000 shares of our common stock at an average price of $31.12, for an aggregate purchase price of $10 million. The shares repurchased under the share repurchase program are available for general corporate purposes. As of September 30, 2014, the remaining amount authorized for share repurchases under the program authorized in the third quarter of 2012 was $95 million.
	In October 2014, our board of directors authorized the repurchase of up to an additional $500 million of our outstanding common stock.
	Other Repurchases of Common Stock
	During the nine months ended September  30, 2014, we repurchased 606,956, shares of our common stock in settlement of employee tax withholding obligations due upon the vesting of restricted stock.
	Preferred Stock
	Our certificate of incorporation authorizes the issuance of 30,000,000 shares of preferred stock, par value $0.01 per share, issuable from time to time in one or more series. At September 30, 2014, there were no preferred shares issued or outstanding. At December 31, 2013,  1,600,000 shares of series A convertible preferred stock were issued and none were outstanding.
	Cash Dividends on Common Stock
	During the nine months ended September 30, 2014, our board of directors declared the following cash dividends:
	Declaration Date	Dividend Per		Record Date	Total Amount(1)		Payment Date
		Common Share
					(in millions)
	30-Jan-14	$	0.13	14-Mar-14	$	22	28-Mar-14
	27-Mar-14	$	0.15	13-Jun-14	$	25	27-Jun-14
	24-Jul-14	$	0.15	12-Sep-14	$	26	26-Sep-14
	(1)   These amounts were recorded in retained earnings in the Condensed Consolidated Balance Sheets at September 30, 2014.
	In October 2014, the board of directors declared a regular quarterly cash dividend of $0.15 per share on our outstanding common stock. The dividend is payable on December 26, 2014 to shareholders of record at the close of business on December 12, 2014. Future declarations of quarterly dividends and the establishment of future record and payment dates are subject to approval by the board of directors.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	12. Earnings Per Share
	The following table sets forth the computation of basic and diluted earnings per share:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
		(in millions, except share and per share amounts)
	Numerator:
	Net income attributable to common shareholders	$	123	$	113	$	328	$	244
	Denominator:
	Weighted-average common shares outstanding for basic earnings per share		168,587,861		167,337,700		169,184,773		166,476,927
	Weighted-average effect of dilutive securities:
	Employee equity awards		3,576,954		3,773,791		3,599,709		3,854,863
	Contingent issuance of common stock(1)		992,247		992,247		330,749		330,749
	Weighted-average common shares outstanding for diluted earnings per share		173,157,062		172,103,738		173,115,231		170,662,539
	Basic and diluted earnings per share:
	Basic earnings per share	$	0.73	$	0.68	$	1.94	$	1.46
	Diluted earnings per share	$	0.71	$	0.66	$	1.89	$	1.43
	(1)   See “Acquisition of eSpeed for Trading of U.S. Treasuries,” of Note 4, “Acquisitions,” for further discussion.
	Stock options to purchase 3,672,919 shares of common stock and 5,880,307 shares of restricted stock and PSUs were outstanding at September 30, 2014. For the three months ended September 30, 2014, we included 3,570,750 of the outstanding stock options and 5,879,265 shares of restricted stock and PSUs in the computation of diluted earnings per share, on a weighted-average basis, as their inclusion was dilutive. For the nine months ended September 30, 2014, we included 3,541,567 of the outstanding stock options and 5,061,458 shares of restricted stock and PSUs in the computation of diluted earnings per share, on a weighted average basis, as their inclusion was dilutive. The remaining stock options and shares of restricted stock and PSUs are antidilutive, and as such, they were properly excluded.
	Stock options to purchase 5,653,638 shares of common stock and 6,407,977 shares of restricted stock and PSUs were outstanding at September 30, 2013. For the three months ended September 30, 2013, we included 4,397,210 of the outstanding stock options and 4,826,614 shares of restricted stock and PSUs in the computation of diluted earnings per share, on a weighted-average basis, as their inclusion was dilutive. For the nine months ended September 30, 2013, we included 4,397,210 of the outstanding stock options and 4,567,960 shares of restricted stock and PSUs in the computation of diluted earnings per share, on a weighted-average basis, as their inclusion was dilutive. The remaining stock options and shares of restricted stock and PSUs are antidilutive, and as such, they were properly excluded.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	13. Fair Value of Financial Instruments
	Fair Value Measurement—Definition and Hierarchy
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability, or the exit price, in an orderly transaction between market participants at the measurement date. Fair value measurement establishes a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Nasdaq’s market assumptions. These two types of inputs create the following fair value hierarchy:
	•Level 1—Quoted prices for identical instruments in active markets.
	•Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable.
	•Level 3—Instruments whose significant value drivers are unobservable.
	This hierarchy requires the use of observable market data when available.
	There were no transfers between Level 1 and Level 2 of the fair value hierarchy as of September 30, 2014 and December 31, 2013. The following table presents for each of the above hierarchy levels, our financial assets and liabilities that are measured at fair value on a recurring basis as of September 30, 2014 and December 31, 2013.
		30-Sep-14
		Total		Level 1		Level 2		Level 3
		(in millions)
	Financial Assets Measured at Fair Value on a Recurring Basis
	Financial investments, at fair value(1)	$	169	$	169	$	-	$	-
	Default fund and margin deposit investments(2)		2,387		738		1,649		-
	Total	$	2,556	$	907	$	1,649	$	-
		31-Dec-13
		Total		Level 1		Level 2		Level 3
		(in millions)
	Financial Assets Measured at Fair Value on a Recurring Basis
	Financial investments, at fair value(1)	$	189	$	189	$	-	$	-
	Default fund and margin deposit investments(2)		1,867		774		1,093		-
	Total	$	2,056	$	963	$	1,093	$	-
	(1)As of September 30, 2014 and December 31, 2013, Level 1 financial investments, at fair value were primarily comprised of trading securities, mainly Swedish government debt securities.  Of these securities,  $156 million as of September 30, 2014 and $167 million as of December 31, 2013 are assets utilized to meet regulatory capital requirements, primarily for the clearing operations of  Nasdaq Nordic Clearing.
	(2)Default fund and margin deposit investments include cash contributions invested by Nasdaq Nordic Clearing, in accordance with its investment policy, either in highly rated government debt securities or reverse repurchase agreements with highly rated government debt securities as collateral. Of the total balance of $2,513 million recorded in the Condensed Consolidated Balance Sheets as of September 30, 2014,  $1,649 million of cash contributions have been invested in reverse repurchase agreements and $738 million of cash contributions have been invested in highly rated government debt securities and time deposits. The remainder of this balance is held in cash. Of the total balance of $1,961 million recorded in the Condensed Consolidated Balance Sheets as of December 31, 2013,  $1,093 million of cash contributions were invested in reverse repurchase agreements and $774 million of cash contributions were invested in highly rated government debt securities. The remainder of this balance was held in cash.
	Financial Instruments Not Measured at Fair Value on a Recurring Basis
	Some of our financial instruments are not measured at fair value on a recurring basis but are recorded at amounts that approximate fair value due to their liquid or short-term nature. Such financial assets and financial liabilities include: cash and cash equivalents, restricted cash, receivables, net, certain other current assets, accounts payable and accrued expenses, Section 31 fees payable to SEC, accrued personnel costs, and certain other current liabilities.
	In addition, our investments in LCH and Borsa Istanbul are carried at cost. See “Cost Method Investments,” of Note 6, “Investments,” for further discussion.
	We also consider our debt obligations to be financial instruments. The fair value of our debt, utilizing discounted cash flow analyses for our floating rate debt and prevailing market rates for our fixed rate debt, was $2.6 billion at September 30, 2014 and  $2.8 billion at December 31, 2013. The discounted cash flow analyses are based on borrowing rates currently available to us for debt with similar terms and maturities. Our fixed rate and our floating rate debt are categorized as Level 2 in the fair value hierarchy. For further discussion of our debt obligations, see Note 8, “Debt Obligations.”

Clearing_Operations

Clearing Operations	9 Months Ended
	Sep. 30, 2014
Clearing Operations [Abstract]	'
Clearing Operations	'
	14. Clearing Operations
	Nordic Clearing
	In April 2014, we completed the integration of NOS Clearing ASA, or NOS Clearing, a leading Norway-based clearinghouse primarily for OTC traded derivatives for the freight market and seafood derivative market into Nasdaq Nordic Clearing. Nasdaq Nordic Clearing is authorized and supervised as a European multi-asset clearinghouse by the Swedish Financial Supervisory Authority, or SFSA, and is authorized to conduct clearing operations in Norway by the Norwegian Ministry of Finance. The clearinghouse acts as the central counterparty, or CCP, for exchange and OTC trades in equity derivatives, fixed income derivatives, physical power, power derivatives, carbon derivatives, resale and repurchase contracts and, with the integration of NOS Clearing, freight derivatives and seafood derivatives. In March 2014, Nasdaq became the first European authorized clearinghouse under the new European Union rules. The region's clearinghouses have to reapply to operate in Europe under new legislation known as the European Market Infrastructure Regulation, or EMIR.
	Through our clearing operations in the financial markets, which include the resale and repurchase market, the commodities markets, and the seafood market, Nasdaq Nordic Clearing is the legal counterparty for, and guarantees the fulfillment of, each contract cleared. These contracts are not used by Nasdaq Nordic Clearing for the purpose of trading on its own behalf. As the legal counterparty of each transaction, Nasdaq Nordic Clearing bears the counterparty risk between the purchaser and seller in the contract. In its guarantor role, Nasdaq Nordic Clearing has precisely equal and offsetting claims to and from clearing members on opposite sides of each contract, standing as an intermediary on every contract cleared. In accordance with the rules and regulations of Nasdaq Nordic Clearing, clearing members’ open positions are aggregated to create a single portfolio for which default fund and margin collateral requirements are calculated. See “Default Fund Contributions” and “Margin Deposits” below for further discussion of Nasdaq Nordic Clearing’s default fund and margin requirements.
	Nasdaq Nordic Clearing maintains four member sponsored default funds: one related to financial markets, one related to commodities markets, one related to the seafood market, and a mutualized fund. Under this structure, Nasdaq Nordic Clearing and its clearing members must contribute to the total regulatory capital related to the clearing operations of Nasdaq Nordic Clearing. This structure applies an initial separation of default fund contributions for the financial, commodities and seafood markets in order to create a buffer for each market’s counterparty risks. Simultaneously, a mutualized default fund provides capital efficiencies to Nasdaq Nordic Clearing with regard to total regulatory capital required. See “Default Fund Contributions” below for further discussion of Nasdaq Nordic Clearing’s default fund. Power of assessment and a liability waterfall have also been implemented. See “Power of Assessment” and “Liability Waterfall” below for further discussion. These requirements ensure the alignment of risk between Nasdaq Nordic Clearing and its clearing members.
	Default Fund Contributions and Margin Deposits
	As of September 30, 2014, clearing member default fund contributions and margin deposits were as follows:
		30-Sep-14
		Cash Contributions(1)(2)		Non-Cash Contributions		Total Contributions
		(in millions)
	Default fund contributions	$	296	$	82	$	378
	Margin deposits		2,217		6,285		8,502
	Total	$	2,513	$	6,367	$	8,880
	(1)As of September 30, 2014, in accordance with its investment policy, Nasdaq Nordic Clearing has invested cash contributions of $1,649 million in reverse repurchase agreements and $738 million in highly rated government debt securities and time deposits. The remainder of this balance is held in cash.
	(2)Pursuant to clearing member agreements, we pay interest on cash contributions to clearing members.
	Default Fund Contributions
	Contributions made to the default funds are proportional to the exposures of each clearing member. When a clearing member is active in more than one market, contributions must be made to all markets’ default funds in which the member is active. Clearing members’ eligible contributions may include cash and non-cash contributions. Cash contributions received are invested by Nasdaq Nordic Clearing, in accordance with its investment policy, either in highly rated government debt securities or reverse repurchase agreements with highly rated government debt securities as collateral. Clearing members’ cash contributions are included in default funds and margin deposits in the Condensed Consolidated Balance Sheets as both a current asset and a current liability. Non-cash contributions include highly rated government debt securities that must meet specific criteria approved by Nasdaq Nordic Clearing. Non-cash contributions are pledged assets that are not recorded in the Condensed Consolidated Balance Sheets as Nasdaq Nordic Clearing does not take legal ownership of these assets and the risks and rewards remain with the clearing members. These balances may fluctuate over time due to changes in the amount of deposits required and whether members choose to provide cash or non-cash contributions. Assets pledged are held at a nominee account in Nasdaq Nordic Clearing’s name for the benefit of the clearing members and are immediately accessible by Nasdaq Nordic Clearing in the event of a default. In addition to clearing members’ required contributions to the default funds, Nasdaq Nordic Clearing is also required to contribute capital to the default funds and overall regulatory capital as specified under its clearinghouse rules. As of September 30, 2014, Nasdaq Nordic Clearing committed capital totaling $110 million to the member sponsored default funds and overall regulatory capital, in the form of government debt securities, which are recorded as financial investments, at fair value in the Condensed Consolidated Balance Sheets. The combined regulatory capital of the clearing members and Nasdaq Nordic Clearing will serve to secure the obligations of a clearing member and may be used to cover losses sustained by a clearing member in the event of a default.
	Other Capital Contributions by Nasdaq Nordic Clearing
	Nasdaq Nordic Clearing maintains a $42 million credit facility which may be utilized in certain default situations, none of which was utilized as of September 30, 2014.
	Margin Deposits
	Nasdaq Nordic Clearing requires all clearing members to provide collateral, which may consist of cash and non-cash contributions, to guarantee performance on the clearing members’ open positions, or initial margin. In addition, clearing members must also provide collateral to cover the daily margin call as needed, which is in addition to the initial margin. See “Default Fund Contributions” above for further discussion of cash and non-cash contributions.
	Nasdaq Nordic Clearing maintains and manages all cash deposits related to margin collateral. All risks and rewards of collateral ownership, including interest, belong to Nasdaq Nordic Clearing. These cash deposits are recorded in default funds and margin deposits in the Condensed Consolidated Balance Sheets as both a current asset and current liability. Pledged margin collateral is not recorded in our Condensed Consolidated Balance Sheets as all risks and rewards of collateral ownership, including interest, belong to the counterparty. Assets pledged are held at a nominee account in Nasdaq Nordic Clearing’s name for the benefit of the clearing members and are immediately accessible by Nasdaq Nordic Clearing in the event of a default.
	Nasdaq Nordic Clearing marks to market all outstanding contracts and requires payment from clearing members whose positions have lost value. The mark-to-market process helps identify any clearing members that may not be able to satisfy their financial obligations in a timely manner allowing Nasdaq Nordic Clearing the ability to mitigate the risk of a clearing member defaulting due to exceptionally large losses. In the event of a default, Nasdaq Nordic Clearing can access the defaulting member’s margin deposits to cover the defaulting member’s losses.
	Regulatory Capital and Risk Management Calculations
	Nasdaq Nordic Clearing manages risk through a comprehensive counterparty risk management framework, which is comprised of policies, procedures, standards and resources. The level of regulatory capital is determined in accordance with Nasdaq Nordic Clearing’s regulatory capital policy, as approved by the SFSA. Regulatory capital calculations are continuously updated through a proprietary capital-at-risk calculation model that establishes the appropriate level of capital.
	As mentioned above, Nasdaq Nordic Clearing is the legal counterparty for each contract traded and thereby guarantees the fulfillment of each contract. Nasdaq Nordic Clearing accounts for this guarantee as a performance guarantee. We determine the fair value of the performance guarantee by considering daily settlement of contracts and other margining and default fund requirements, the risk management program, historical evidence of default payments, and the estimated probability of potential default payouts. The calculation is determined using proprietary risk management software that simulates gains and losses based on historical market prices, extreme but plausible market scenarios, volatility and other factors present at that point in time for those particular unsettled contracts. Based on this analysis, the estimated liability was nominal and no liability was recorded as of September 30, 2014.
	The market value of derivative contracts outstanding prior to netting was as follows:
		30-Sep-14
		(in millions)
	Commodity options, futures and forwards(1)(2)(3)	$	987
	Fixed-income options and futures(2)(3)		611
	Stock options and futures(2)(3)		161
	Index options and futures(2)(3)		219
	Seafood options and futures(2)(3)		-
	Total	$	1,978
	(1)We determined the fair value of our forward contracts using standard valuation models that were based on market-based observable inputs including LIBOR rates and the spot price of the underlying instrument.
	(2)We determined the fair value of our option contracts using standard valuation models that were based on market-based observable inputs including implied volatility, interest rates and the spot price of the underlying instrument.
	(3)We determined the fair value of our futures contracts based upon quoted market prices and average quoted market yields.
	The total number of derivative contracts cleared through Nasdaq Nordic Clearing for the nine months ended September 30, 2014 and 2013 was as follows:
		30-Sep-14		30-Sep-13
	Commodity options, futures and forwards(1)		1,705,947		2,217,572
	Fixed-income options and futures		14,270,232		21,131,906
	Stock options and futures		24,426,440		23,200,139
	Index options and futures		29,705,046		29,892,938
	Seafood options and futures		69,488		1,700
	Total		70,177,153		76,444,255
	(1)The total volume in cleared power related to commodity contracts was 1,150 Terawatt hours (TWh) for the nine months ended September 30, 2014 and 1,247 TWh for the nine months ended September 30, 2013.
	The outstanding contract value of resale and repurchase agreements was $2.6 billion as of September 30, 2014 and $5.6 billion as of September 30, 2013. The total number of contracts cleared was 3,157,685 for the nine months ended September 30, 2014 and was 3,428,514 for the nine months ended September 30, 2013.
	Power of Assessment
	To further strengthen the contingent financial resources of the clearinghouse, Nasdaq Nordic Clearing has power of assessment that provides the ability to collect additional funds from its clearing members to cover a defaulting member’s remaining obligations up to the limits established under the terms of the clearinghouse rules. The power of assessment corresponds to 100% of the clearing member’s aggregate contribution to the financial, commodities, and the seafood market’s default funds.
	Liability Waterfall
	The liability waterfall is the priority order in which the capital resources would be utilized in the event of a default where the defaulting clearing member’s collateral would not be sufficient to cover the cost to settle its portfolio. If a default occurs and the defaulting clearing member’s collateral, including cash deposits and pledged assets, is depleted, then capital is utilized in the following amount and order:
	•junior capital contributed to each specific market by Nasdaq Nordic Clearing, which totaled $20 million at September 30, 2014;
	•a loss sharing pool related only to the financial market that is contributed to by clearing members and only applies if the defaulting member’s portfolio includes interest rate swap products;
	•specific market default fund where the loss occurred, either the financial, commodities, or seafood market, which includes capital contributions of both the clearing members and Nasdaq Nordic Clearing on a pro-rata basis;
	•senior capital contributed to each specific market by Nasdaq Nordic Clearing, calculated in accordance with clearinghouse rules to be $14 million at September 30, 2014; and
	•mutualized default fund, which includes capital contributions of both the clearing members and Nasdaq Nordic Clearing on a pro-rata basis.
	If additional funds are needed after utilization of the mutualized default fund, then Nasdaq Nordic Clearing will utilize its power of assessment and additional capital contributions will be required by non-defaulting members up to the limits established under the terms of the clearinghouse rules.

Commitments_Contingencies_and_

Commitments, Contingencies and Guarantees	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments, Contingencies and Guarantees	'
	15. Commitments, Contingencies and Guarantees
	Guarantees Issued and Credit Facilities Available
	In addition to the default fund contributions and margin collateral pledged by clearing members discussed in Note 14, “Clearing Operations,” we have obtained financial guarantees and credit facilities which are guaranteed by us through counter indemnities, to provide further liquidity and default protection related to our clearing businesses. Financial guarantees issued to us totaled $27 million at September 30, 2014 and $20 million at December 31, 2013. At September 30, 2014, credit facilities, which are available in multiple currencies, primarily Swedish Krona, totaled $253 million ($211 million in available liquidity and $42 million for default protection), none of which was utilized. At December 31, 2013, these facilities totaled $312 million ($219 million in available liquidity and $93 million for default protection), of which $11 million was utilized.
	Execution Access LLC is an introducing broker which operates the eSpeed trading platform for U.S. Treasury securities. Execution Access has a clearing arrangement with Cantor Fitzgerald & Co., or Cantor Fitzgerald. As of September 30, 2014, we have contributed $31 million of clearing deposits to Cantor Fitzgerald in connection with this clearing arrangement. These deposits are recorded in other current assets in our Condensed Consolidated Balance Sheets. Some of the trading activity in Execution Access is cleared by Cantor Fitzgerald through the Fixed Income Clearing Corporation, or FICC, and the balance is cleared non-FICC. Execution Access assumes the counterparty risk of clients that do not clear through FICC. Counterparty risk of clients exists for Execution Access between the trade date and the settlement date of the individual transactions, which is one business day. All of Execution Access’ obligations under the clearing arrangement with Cantor Fitzgerald are guaranteed by Nasdaq. Some of the non-FICC counterparties are required to post collateral, provide principal letters, or provide other forms of credit enhancement to Execution Access for the purpose of mitigating counterparty risk.
	We believe that the potential for us to be required to make payments under these arrangements is mitigated through the pledged collateral and our risk management policies. Accordingly, no contingent liability is recorded in the Condensed Consolidated Balance Sheets for these arrangements.
	Lease Commitments
	We lease some of our office space and equipment under non-cancelable operating leases with third parties and sublease office space to third parties. Some of our lease agreements contain renewal options and escalation clauses based on increases in property taxes and building operating costs.
	Other Guarantees
	We have provided other guarantees of $14 million as of September 30, 2014 and $17 million at December 31, 2013. These guarantees are primarily related to obligations for our rental and leasing contracts as well as performance guarantees on certain Market Technology contracts related to the delivery of software technology and support services. We have received financial guarantees from various financial institutions to support the above guarantees.
	In September 2014, we provided a guarantee related to lease obligations for The Nasdaq Entrepreneurial Center Inc., or the Entrepreneurial Center, which is scheduled to open in 2015. The Entrepreneurial Center will be a not-for-profit organization designed to convene, connect and engage aspiring and current entrepreneurs. This entity is not included in the condensed consolidated financial statements of Nasdaq.
	We believe that the potential for us to be required to make payments under these arrangements is unlikely. Accordingly, no contingent liability is recorded in the Condensed Consolidated Balance Sheets for the above guarantees.
	In connection with the launch of Nasdaq NLX, we entered into agreements with certain members which may require us to make payments if certain financial goals are achieved. Since the amount of these payments is not currently probable and cannot be quantified as of September  30, 2014, no contingent liability is recorded in the Condensed Consolidated Balance Sheets for these payments.
	Contingent Consideration
	In March 2014, we completed the acquisition of the remaining 28% ownership interest in BWise. The purchase included two installment payments, the first of which was made in March 2014.  The second installment payment is expected to be paid in 2015.
	As part of the eSpeed purchase price consideration, we have agreed to future annual issuances of 992,247 shares of Nasdaq common stock which approximated certain tax benefits associated with the transaction. Such contingent future issuances of Nasdaq common stock will be paid ratably through 2027 if Nasdaq’s total gross revenues equal or exceed $25 million in each such year. The contingent future issuances of Nasdaq common stock are subject to anti-dilution protections and acceleration upon certain events.
	Escrow Agreements
	In connection with our acquisitions of FTEN and Glide Technologies, we entered into escrow agreements to secure the payments of post-closing adjustments and to ensure other closing conditions. At September 30, 2014, these escrow agreements provide for future payments of $10 million and are included in other current liabilities and other non-current liabilities in the Condensed Consolidated Balance Sheets.
	Routing Brokerage Activities
	Our broker-dealer subsidiary, Nasdaq Execution Services, LLC provides a  guarantee to securities clearinghouses and exchanges under its standard membership agreements, which require members to guarantee the performance of other members. If a member becomes unable to satisfy its obligations to a clearinghouse or exchange, other members would be required to meet its shortfalls. To mitigate these performance risks, the exchanges and clearinghouses often require members to post collateral, as well as meet certain minimum financial standards. Nasdaq Execution Services’ maximum potential liability under these arrangements cannot be quantified. However, we believe that the potential for Nasdaq Execution Services to be required to make payments under these arrangements is unlikely. Accordingly, no contingent liability is recorded in the Condensed Consolidated Balance Sheets for these arrangements.
	In March 2014, Nasdaq Execution Services began routing options and became the sole routing broker for Nasdaq’s U.S. cash equities and options exchanges. As a consequence, Nasdaq Options Services, LLC, which previously served as the routing broker for our U.S. options exchanges, became non-operational and terminated its exchange and clearinghouse memberships in March 2014.
	Litigation
	As previously disclosed, we became a party to several legal and regulatory proceedings in 2012, 2013, and 2014 relating to the Facebook IPO that occurred on May 18, 2012. We believe that the legal actions filed against Nasdaq are without merit and intend to defend them vigorously.
	As described in our Annual Report on Form 10-K for the year ended December 31, 2012, we are named as a defendant in a consolidated matter captioned In re Facebook, Inc., IPO Securities and Derivative Litigation, MDL No. 2389 (S.D.N.Y.). Our appeal of the district court’s order granting in part and denying in part our motion to dismiss the consolidated amended complaint is currently pending in the United States Court of Appeals for the Second Circuit, at No. 14-1457.
	In our Quarterly Report on Form 10-Q for the period ended March 31, 2013, we identified a demand for arbitration from a member organization seeking indemnification for alleged losses associated with the Facebook IPO. On June 18, 2013, the District Court for the Southern District of New York granted a preliminary injunction enjoining the arbitration, and the member organization appealed the order granting the injunction to the Second Circuit Court of Appeals. On October 31, 2014, the Second Circuit Court of Appeals affirmed the preliminary injunction.
	We also are named as one of many defendants in City of Providence v. BATS Global Markets, Inc., et al., 14 Civ. 2811 (S.D.N.Y.), which was filed on April 18, 2014 in the United States District Court for the Southern District of New York. The district court appointed lead counsel, who filed an amended complaint on September 2, 2014. The amended complaint names as defendants seven national exchanges, as well as Barclays PLC, which operated a private alternative trading system. On behalf of a putative class of securities traders, the plaintiffs allege that the defendants engaged in a scheme to manipulate the markets through high-frequency trading; the amended complaint asserts claims against us under Section 10(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Rule 10b-5, as well as under Section 6(b) of the Exchange Act. We filed a motion to dismiss the amended complaint on November 3, 2014. Given the preliminary nature of the proceedings, we are unable to estimate what, if any, liability may result from this litigation. However, we believe the claims to be without merit and intend to litigate them vigorously.
	In addition, we are named as one of many exchange defendants in Lanier v. BATS Exchange Inc., et al., 14 Civ. 3745 (S.D.N.Y.), Lanier v. BATS Exchange Inc., et al., 14 Civ. 3865 (S.D.N.Y.), and Lanier v. Bats Exchange Inc., 14 Civ. 3866 (S.D.N.Y.), which were filed between May 23, 2014 and May 30, 2014 in the United States District Court for the Southern District of New York. The plaintiff is the same in each of these cases, and the three complaints contain substantially similar allegations. On behalf of a putative class of subscribers for market data provided by national exchanges, the plaintiff alleges that the exchanges provided data more quickly to certain market participants than to others, supposedly in breach of the exchanges’ plans for dissemination of market data and subscriber agreements executed under those plans. The complaint asserts contractual theories under state law based on these alleged breaches. On September 29, 2014, we filed a motion to dismiss the complaints, which remains pending. Given the preliminary nature of the proceedings, we are unable to estimate what, if any, liability may result from this litigation. However, we believe the claims to be without merit and intend to litigate them vigorously.
	Except as disclosed above and in prior reports filed under the Exchange Act, we are not currently a party to any litigation or proceeding that we believe could have a material adverse effect on our business, consolidated financial condition, or operating results. However, from time to time, we have been threatened with, or named as a defendant in, lawsuits or involved in regulatory proceedings.
	Tax Audits
	We are engaged in ongoing discussions and audits with taxing authorities on various tax matters, the resolutions of which are uncertain. Currently, there are matters that may lead to assessments, some of which may not be resolved for several years. Based on currently available information, we believe we have adequately provided for any assessments that could result from those proceedings where it is more likely than not that we will be assessed. We review our positions on these matters as they progress.

Business_Segments

Business Segments	9 Months Ended
	Sep. 30, 2014
Text Block [Abstract]	'
Business Segments	'
	16. Business Segments
	We manage, operate and provide our products and services in four business segments: Market Services, Listing Services, Information Services and Technology Solutions.
	Our reportable segments are as follows.
	Market Services
	Our Market Services segment includes our derivative trading and clearing, cash equity trading, fixed income trading, and access and broker services businesses.  We operate multiple exchanges and other marketplace facilities across several asset classes, including derivatives, commodities, cash equity, debt, structured products and ETFs. In addition, in some countries where we operate exchanges, we also provide broker services, clearing, settlement and central depository services. Our transaction-based platforms provide market participants with the ability to access, process, display and integrate orders and quotes for cash equity securities, derivatives and ETFs. The platforms allow the routing and execution of buy and sell orders as well as the reporting of transactions for cash equity securities, derivatives and ETFs, providing fee-based revenues.
	Listing Services
	Our Listing Services segment includes our U.S. and European Listing Services businesses. We operate a variety of listing platforms around the world to provide multiple global capital raising solutions for private and public companies. Our main listing markets are The NASDAQ Stock Market and the Nasdaq Nordic and Nasdaq Baltic exchanges. In March 2014, we launched NPM, a marketplace for private growth companies.
	Information Services
	Our Information Services segment includes our Market Data Products and Index Licensing and Services businesses.
	Our Market Data Products business sells and distributes historical and real-time quote and trade information to market participants and data distributers. Our market data products enhance transparency of the market activity within the exchanges that we operate and provide critical information to financial professional and individual investors globally.
	Our Index Licensing and Services business develops and licenses Nasdaq branded indexes, associated derivatives, and financial products and also provides custom calculation services for third-party clients.
	Technology Solutions
	Our Technology Solutions segment includes our Corporate Solutions and Market Technology businesses.
	Our Corporate Solutions business serves corporate clients, including companies listed on our exchanges. We help organizations manage the two-way flow of information with their key constituents, including their board members and public investors in their stock, and with clients and the public through our suite of advanced technology, analytics, and consultative services. In May 2013, we acquired the TR Corporate businesses which were integrated into our Corporate Solutions business. With the acquisition of the TR Corporate businesses, our Corporate Solutions business primarily offers products to serve the following key areas: investor relations, public relations, multimedia solutions, and governance.
	Our Market Technology business is a leading global technology solutions provider and partner to exchanges, clearing organizations, central securities depositories, regulators, banks, brokers and corporate businesses. Our Market Technology business is the sales channel for our complete global offering to other marketplaces.
	Market Technology provides technology solutions for trading, clearing, settlement,  surveillance and information dissemination to markets with wide-ranging requirements, from the leading markets in the U.S., Europe and Asia to emerging markets in the Middle East, Latin America, and Africa. Our marketplace solutions can handle a wide array of assets including cash equities, equity derivatives, currencies, various interest-bearing securities, commodities, energy products and derivatives. Market Technology also provides market surveillance services to broker-dealer firms worldwide, as well as enterprise governance, risk management and compliance software solutions.
	Our management allocates resources, assesses performance and manages these businesses as four separate segments. We evaluate the performance of our segments based on several factors, of which the primary financial measure is operating income. Results of individual businesses are presented based on our management accounting practices and our management structure. Certain amounts are allocated to corporate items in our management reports based on the decision that those activities should not be used to evaluate the segment’s operating performance. See below for further discussion.
	The following table presents certain information regarding these operating segments for the three and nine months ended September 30, 2014 and 2013.
		Market Services		Listing Services		Information Services		Technology Solutions		Corporate Items and Eliminations		Consolidated
		(in millions)
	Three Months Ended September 30, 2014
	Total revenues	$	515	$	59	$	114	$	130	$	-	$	818
	Cost of revenues		-321		-		-		-		-		-321
	Revenues less transaction rebates, brokerage, clearance and exchange fees		194		59		114		130		-		497
	Operating income (loss)(1)	$	89	$	25	$	82	$	17	$	-6	$	207
	Three Months Ended September 30, 2013
	Total revenues	$	499	$	57	$	117	$	132	$	-	$	805
	Cost of revenues		-299		-		-		-		-		-299
	Revenues less transaction rebates, brokerage, clearance and exchange fees		200		57		117		132		-		506
	Operating income (loss)(2)	$	85	$	22	$	87	$	8	$	-	$	202
	Nine Months Ended September 30, 2014
	Total revenues	$	1,640	$	177	$	360	$	403	$	-	$	2,580
	Cost of revenues		-1,031		-		-		-		-		-1,031
	Revenues less transaction rebates, brokerage, clearance and exchange fees		609		177		360		403		-		1,549
	Operating income (loss)(3)	$	271	$	70	$	264	$	36	$	-60	$	581
	Nine Months Ended September 30, 2013
	Total revenues	$	1,559	$	170	$	329	$	304	$	-	$	2,362
	Cost of revenues		-987		-		-		-		-		-987
	Revenues less transaction rebates, brokerage, clearance and exchange fees		572		170		329		304		-		1,375
	Operating income (loss)(4)	$	234	$	69	$	246	$	18	$	-117	$	450
	(1)   Corporate items and eliminations for the three months ended September 30, 2014 primarily include merger and strategic initiatives expense of $5 million primarily related to the acquisition of the TR Corporate businesses.
	(2)   Corporate items and eliminations for the three months ended September 30, 2013 primarily include merger and strategic initiatives expense of $8 million primarily related to the acquisitions of eSpeed and the TR Corporate businesses. These amounts were offset by the remeasurement of a contingent purchase price liability related to the BWise acquisition due to changes in the anticipated performance of BWise.
	(3)   Corporate items and eliminations for the nine months ended September 30,  2014 primarily include merger and strategic initiatives expense of $46 million primarily related to the acquisition of the TR Corporate businesses and other strategic initiatives  and a loss on debt extinguishment of $9 million.
	(4)   Corporate items and eliminations for the nine months ended September 30, 2013 primarily include expense related to the one-time program for voluntary accommodations to qualifying members of up to $62 million. This program expanded the pool available to compensate members of The NASDAQ Stock Market for qualified losses arising directly from the system issues experienced with the Facebook IPO that occurred on May 18, 2012. Our liability was reduced to $44 million and payment of valid claims totaling $44 million was made in the fourth quarter of 2013. Corporate items and eliminations also include merger and strategic initiatives expense of $33 million primarily related to our acquisitions of eSpeed and the TR Corporate businesses, expense related to an SEC matter of $10 million,  and restructuring charges of $9 million.
	For further discussion of our acquisitions, see “Acquisition of eSpeed for Trading of U.S. Treasuries,” and “Acquisition of the Investor Relations, Public Relations and Multimedia Solutions Businesses of Thomson Reuters,” of Note 4, “Acquisitions.”
	For further discussion of the debt extinguishment, see “Early Extinguishment of 2015 Notes,” of Note 8, “Debt Obligation.”
	For further discussion of the restructuring charges, see Note 3, “Restructuring Charges.”
	For further discussion of our segments’ results, see “Part I. Item  2. Management’s Discussion and Analysis of Financial    Condition and Results of Operations—Segment Operating Results.”

Subsequent_Event

Subsequent Event	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Event	'
	17. Subsequent Event
	In October 2014, our board of directors authorized the repurchase of up to an additional $500 million of our outstanding common stock under our share repurchase program. These purchases may be made from time to time at prevailing market prices in open market purchases, privately-negotiated transactions, block purchase techniques or otherwise, as determined by our management. The purchases are funded from existing cash balances. The share repurchase program may be suspended, modified or discontinued at any time.

Basis_of_Presentation_and_Prin1

Basis of Presentation and Principles of Consolidation (Policy)	9 Months Ended
	Sep. 30, 2014
Basis of Presentation and Principles of Consolidation [Abstract]	'
Basis of Presentation and Principles of Consolidation	'
	The condensed consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles, or U.S. GAAP. The condensed consolidated financial statements include the accounts of Nasdaq, its wholly-owned subsidiaries and other entities in which Nasdaq has a controlling financial interest. The accompanying unaudited condensed consolidated financial statements reflect all adjustments which are, in the opinion of management, necessary for a fair statement of the results for the interim periods presented. These adjustments are of a normal recurring nature. All significant intercompany accounts and transactions have been eliminated in consolidation.
	As permitted under U.S. GAAP, certain footnotes or other financial information can be condensed or omitted in the interim condensed consolidated financial statements. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and accompanying notes included in Nasdaq’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
	Certain prior period amounts have been reclassified to conform to the current period presentation.
	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and the disclosure of contingent amounts in the condensed consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
	We have evaluated subsequent events through the issuance date of this Quarterly Report on Form 10-Q.  See Note 17, “Subsequent Event,” for further discussion.
Basis of Accounting	'
	Certain prior period amounts have been reclassified to conform to the current period presentation.
	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and the disclosure of contingent amounts in the condensed consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
Income Taxes	'
	Tax Matters
	We use the asset and liability method to determine income taxes on all transactions recorded in the condensed consolidated financial statements. Deferred tax assets and liabilities are determined based on differences between the financial statement carrying amounts and the tax basis of existing assets and liabilities (i.e., temporary differences) and are measured at the enacted rates that will be in effect when these differences are realized. If necessary, a valuation allowance is established to reduce deferred tax assets to the amount that is more likely than not to be realized.
	In order to recognize and measure our unrecognized tax benefits, management determines whether a tax position is more likely than not to be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. Once it is determined that a position meets the recognition thresholds, the position is measured to determine the amount of benefit to be recognized in the condensed consolidated financial statements. Interest and/or penalties related to income tax matters are recognized in income tax expense.
	As shown in the Condensed Consolidated Statements of Comprehensive Income, the income tax benefit in the first nine months of 2013 was impacted due to an assertion made by Nasdaq to permanently reinvest the earnings of certain foreign subsidiaries. As a result of this assertion, adjustments were made to our deferred tax balances relating to cumulative translation adjustments pertaining to these subsidiaries.
	Nasdaq’s income tax provision was $56 million in the third quarter of 2014 compared with $58 million in the third quarter of 2013 and $170 million in the first nine months of 2014 compared with $122 million in the first nine months of 2013. The overall effective tax rate was 31% in the third quarter of 2014, 34% in the third quarter of 2013 and first nine months of 2014 and 33% in the first nine months of 2013. The lower effective tax rate in the third quarter of 2014 when compared with the same period in 2013 is primarily due to adjustments related to prior year tax return liabilities which resulted in a decrease to the tax provision. In addition, in the third quarter of 2013 we recorded an increase in net deferred tax liabilities resulting from changes in tax rates in various jurisdictions. The higher effective tax rate for the first nine months of 2014 when compared with the same period in 2013 is primarily due to a gain recorded in 2013 associated with the remeasurement of a contingent purchase price liability related to the BWise acquisition which was exempt from taxation. The effective tax rate may vary from period to period depending on, among other factors, the geographic and business mix of earnings and losses. These same and other factors, including our history of pre-tax earnings and losses, are taken into account in assessing the ability to realize deferred tax assets.
	Nasdaq and its eligible subsidiaries file a consolidated U.S. federal income tax return and applicable state and local income tax returns and non-U.S. income tax returns. Federal income tax returns for the years 2007 through 2012 are currently under audit by the Internal Revenue Service and we are subject to examination for 2013. Several state tax returns are currently under examination by the respective tax authorities for the years 2005 through 2012 and we are subject to examination for 2013. Non-U.S. tax returns are subject to examination by the respective tax authorities for the years 2006 through 2013. We anticipate that the amount of unrecognized tax benefits at September 30, 2014 will significantly decrease in the next twelve months as we expect to settle certain tax audits. The final outcome of such audits cannot yet be determined. We anticipate that such adjustments will not have a material impact on our consolidated financial position or results of operations.
	In the fourth quarter of 2010, we received an appeal from the Finnish Tax Authority challenging certain interest expense deductions claimed by Nasdaq in Finland for the year 2008. The appeal also demanded certain penalties be paid with regard to the company’s tax return filing position. In October 2012, the Finnish Appeals Board disagreed with the company’s tax return filing position for the years 2009 through 2011, even though the tax return position with respect to this deduction was previously reviewed and approved by the Finnish Tax Authority. In June 2014, the Finnish Administrative Court also disagreed with the company’s tax return filing position. We have appealed this ruling to the Finnish Supreme Administrative Court and expect to receive a favorable decision. Through September 30, 2014, we have recorded tax benefits of $22 million associated with this filing position. Of this amount, we have paid $14 million to the Finnish tax authorities. We have also paid $11 million in interest and penalties. In 2014, we will pay $8 million, which represents the unpaid amounts for benefits taken in 2013 and the first nine months of 2014. We expect the Finnish Supreme Administrative Court to agree with our position, which would result in an expected refund to Nasdaq of $33 million.
	From 2009 through 2012, we recorded tax benefits associated with certain interest expense incurred in Sweden. Our position is supported by a 2011 ruling we received from the Swedish Supreme Administrative Court. However, under new legislation effective January 1, 2013, limitations are imposed on certain forms of interest expense. Because this legislation is unclear with regard to our ability to continue to claim such interest deductions, Nasdaq filed an application for an advance tax ruling with the Swedish Tax Council for Advance Tax Rulings. In June 2014, we received an unfavorable ruling from the Swedish Tax Council for Advance Tax Rulings. We have appealed this ruling to the Swedish Supreme Administrative Court and expect to receive a favorable decision. Since January 1, 2013, we have recorded tax benefits of $28 million, or $0.16 per diluted share, related to this matter. We expect to record recurring quarterly tax benefits of $4 million to $5 million with respect to this issue for the foreseeable future.
	In December 2012, the Swedish Tax Agency approved our 2010 amended value added tax, or VAT, tax return and we received a cash refund for the amount claimed. In 2013, we filed VAT tax returns for 2011 and 2012 and utilized the same approach which was approved for the 2010 filing. However, even though the VAT return position was previously reviewed and approved by the Swedish Tax Agency, we were informed by the Swedish Tax Agency that our VAT refund claims for 2011 and 2012 are not valid. However, they will not seek reimbursement of the 2010 refund. We have appealed the finding by the Swedish Tax Agency to the Administrative Court. For the period January 1, 2011 through September 30, 2014, we have recorded benefits of $16 million associated with this position.
Recently Adopted Accounting Pronouncements	'
	Recently Announced Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2014-09, “Revenue from Contracts with Customers (Topic 606),” which supersedes the revenue recognition guidance in Accounting Standards Codification, or ASC, 605, “Revenue Recognition.” The new revenue recognition standard sets forth a five-step revenue recognition model to determine when and how revenue is recognized. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration it expects to receive in exchange for those goods or services. The standard also requires more detailed disclosures. The standard provides alternative methods of initial adoption and is effective for us on January 1, 2017. Early adoption is not permitted. We are currently assessing the impact that this standard will have on our consolidated financial statements.
	In April 2014, the FASB issued ASU 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity,” which raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation.  Under the new guidance, only disposals representing a strategic shift in operations that have or will have a major effect on an entity’s operations and financial results should be presented as discontinued operations. This guidance is effective for us on January 1, 2015. Early adoption is permitted provided that the disposal was not previously disclosed. We will prospectively apply this new standard to applicable transactions.

Restructuring_Charges_Tables

Restructuring Charges (Tables)	9 Months Ended
	Sep. 30, 2014
Restructuring Charges [Abstract]	'
Summary of Restructuring Charges	'
		Nine Months Ended September 30,
		2013
		(in millions)
	Severance	$	6
	Facilities-related		1
	Asset impairments		1
	Other		1
	Total restructuring charges	$	9

Acquisitions_and_Divestitures_

Acquisitions and Divestitures (Tables)	9 Months Ended
	Sep. 30, 2014
Acquisitions [Abstract]	'
Acquisition of Businesses	'
		Purchase Consideration		Total Net Assets (Liabilities) Acquired		Purchased Intangible Assets		Goodwill
			(in millions)
	eSpeed	$	1,239	$	5	$	715	$	519
	TR Corporate businesses		366		-37		91		312

Goodwill_and_Purchased_Intangi1

Goodwill and Purchased Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Changes in Goodwill	'
		Market Services		Listing Services		Information Services		Technology Solutions		Total
		(in millions)
	Balance at December 31, 2013	$	3,433	$	136	$	2,019	$	598	$	6,186
	Goodwill acquired		-		-		-		-		-
	Foreign currency translation adjustment		-211		-7		-124		-42		-384
	Balance at September 30, 2014	$	3,222	$	129	$	1,895	$	556	$	5,802
Finite-Lived and Indefinite-Lived Intangible Assets	'
		30-Sep-14								31-Dec-13
		Gross Amount		Accumulated Amortization		Net Amount		Weighted-Average Useful Life (in Years)		Gross Amount		Accumulated Amortization		Net Amount		Weighted-Average Useful Life (in Years)
		(in millions)								(in millions)
	Finite-Lived Intangible Assets
	Technology	$	37	$	-15	$	22		5	$	39	$	-12	$	27		5
	Customer relationships		1,047		-314		733		20		1,075		-292		783		19
	Other		5		-3		2		9		5		-3		2		8
	Foreign currency translation adjustment		-51		14		-37				3		-		3
	Total finite-lived intangible assets	$	1,038	$	-318	$	720			$	1,122	$	-307	$	815
	Indefinite-Lived Intangible Assets
	Exchange and clearing registrations	$	790	$	-	$	790			$	790	$	-	$	790
	Trade names		756		-		756				756		-		756
	Licenses		51		-		51				51		-		51
	Foreign currency translation adjustment		-104		-		-104				-26		-		-26
	Total indefinite-lived intangible assets	$	1,493	$	-	$	1,493			$	1,571	$	-	$	1,571
	Total intangible assets	$	2,531	$	-318	$	2,213			$	2,693	$	-307	$	2,386
Estimated Future Amortization Expense	'
		(in millions)
	2014(1)	$	17
	2015		68
	2016		67
	2017		65
	2018		61
	2019 and thereafter		479
	Total	$	757
	(1)   Represents the estimated amortization to be recognized for the remaining three months of 2014.

Deferred_Revenue_Tables

Deferred Revenue (Tables)	9 Months Ended
	Sep. 30, 2014
Deferred Revenue [Abstract]	'
Estimated Deferred Revenue	'
		Initial Listing Revenues		Listing of Additional Shares Revenues		Annual Renewal and Other Revenues		Technology Solutions Revenues(2)		Total
		(in millions)
	Fiscal year ended:
	2014(1)	$	4	$	9	$	54	$	46	$	113
	2015		14		32		2		48		96
	2016		11		23		1		29		64
	2017		9		14		-		35		58
	2018		7		3		-		37		47
	2019 and thereafter		6		-		-		28		34
		$	51	$	81	$	57	$	223	$	412
	(1)   Represents deferred revenue that is anticipated to be recognized over the remaining three months of 2014.
	(2)   The timing of recognition of our deferred Technology Solutions revenues is primarily dependent upon the completion of customization and any significant modifications made pursuant to existing Market Technology contracts and the timing of Corporate Solutions subscription-based contracts. As such, as it relates to Market Technology revenues, the timing represents our best estimate.
	The changes in our deferred revenue during the nine months ended September  30, 2014 and 2013 are reflected in the following table.
Changes in Deferred Revenue	'
		Initial Listing Revenues		Listing of Additional Shares Revenues		Annual Renewal and Other Revenues		Technology Solutions Revenues(2)		Total
		(in millions)
	Balance at January 1, 2014	$	41	$	75	$	20	$	158	$	294
	Additions(1)		20		36		214		463		733
	Amortization(1)		-10		-30		-175		-381		-596
	Translation adjustment		-		-		-2		-17		-19
	Balance at September 30, 2014	$	51	$	81	$	57	$	223	$	412
	Balance at January 1, 2013	$	36	$	78	$	32	$	149	$	295
	Additions(1)		12		28		215		156		411
	Amortization(1)		-10		-30		-177		-155		-372
	Translation adjustment		-		-		-6		11		5
	Balance at September 30, 2013	$	38	$	76	$	64	$	161	$	339
	(1) The additions and amortization for initial listing revenues, listing of additional shares revenues and annual renewal and other revenues primarily reflect revenues from our U.S. Listing Services business. The additions to Technology Solutions revenues during the nine months ended September 30, 2014 include $75 million related to the Borsa Istanbul market technology agreement.  See “Cost Method Investments,” of Note 6, “Investments,” for further discussion.
	(2)       Technology Solutions deferred revenues primarily include revenues from our Market Technology delivered client contracts in the support phase charged during the period and our Corporate Solutions subscription based contracts, which are primarily billed quarterly in advance.  For our Market Technology contracts, where customization and significant modifications to the software are made to meet the needs of our customers, total revenues, as well as costs incurred, are deferred until significant modifications are completed and delivered. Once delivered, deferred revenue and the related deferred costs are recognized over the post contract support period. For these Market Technology contracts, we have included the deferral of costs in other current assets and other non-current assets in the Condensed Consolidated Balance Sheets. The amortization of Technology Solutions deferred revenue primarily includes revenues earned from Market Technology client contracts and Corporate Solutions subscription based contracts recognized during the period.

Debt_Obligations_Tables

Debt Obligations (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Changes in Debt Obligations	'
		31-Dec-13		Additions		Payments, Accretion and Other		30-Sep-14
		(in millions)
	4.00% senior unsecured notes repaid June 18, 2014(1)	$	400	$	-	$	-400	$	-
	5.55% senior unsecured notes due January 15, 2020 (net of discount)(1)		598		-		1		599
	5.25% senior unsecured notes due January 16, 2018 (net of discount)(1)		368		-		-		368
	3.875% senior unsecured notes due June 7, 2021 (net of discount)(1)		824		-		-67		757
	4.25% senior unsecured notes due June 1, 2024 (net of discount)(1)		-		498		-		498
	$1.2 billion senior unsecured five-year credit facility(2):
	$450 million senior unsecured term loan facility credit agreement due September 19, 2016 (average interest rate of 1.53% for the period January 1, 2014 through September 30, 2014)		349		-		-226		123
	$750 million revolving credit commitment due September 19, 2016 (average interest rate of 1.33% for the period January 1, 2014 through September 30, 2014)		95		118		-213		-
	Total debt obligations		2,634		616		-905		2,345
	Less current portion		-45		-		45		-
	Total long-term debt obligations	$	2,589	$	616	$	-860	$	2,345
	(1) See “Senior Unsecured Notes” below for further discussion.
	(2) See “2011 Credit Facility” below for further discussion.

Employee_Benefits_Tables

Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Components of Net Periodic Benefit Cost	'
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
		(in millions)
	Components of net periodic benefit cost
	Interest cost	$	1	$	1	$	4	$	4
	Expected return on plan assets		-1		-1		-4		-4
	Recognized net actuarial loss		-		1		1		3
	Curtailment loss		-		-		-		1
	Net periodic benefit cost	$	-	$	1	$	1	$	4

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2014
Share-Based Compensation [Abstract]	'
Schedule of Weighted-Average Assumptions Used to Determine the Weighted-Average Fair Values	'
		Nine Months Ended September 30,
		2014
	Weighted-average risk free interest rate		0.78%
	Expected volatility(1)		28.4%
	Weighted-average fair value at grant date	$	42.80
	(1)   We use historic volatility for PSU awards issued under the TSR program, as implied volatility cannot be used when simulating multivariate prices for companies in the S&P 500.
Summary of Share-Based Compensation Expense	'
		Three Months Ended September 30,					Nine Months Ended September 30,
		2014			2013		2014			2013
		(in millions)
	Share-based compensation expense before income taxes	$	15		$	14	$	45		$	32
	Income tax benefit		-6			-6		-19			-13
	Share-based compensation expense after income taxes	$	9		$	8	$	26		$	19
Summary of Stock Option Activity	'
		Number of Stock Options(1)			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term			Aggregate Intrinsic Value
							(in years)			(in millions)
	Outstanding at January 1, 2014		4,926,522		$	25.21		4.97		$	73
	Exercised		-1,222,139			19.92
	Forfeited or expired		-31,464			24.24
	Outstanding at September 30, 2014		3,672,919		$	26.98		4.13		$	57
	Exercisable at September 30, 2014		3,662,897		$	27.00		4.12		$	57
	(1)  No stock option awards were granted during the three and nine months ended September 30, 2014.
Summary of Restricted Stock And PSU Activity	'
		Restricted Stock					PSUs
		Number of Awards			Weighted-Average Grant Date Fair Value		Number of Awards			Weighted-Average Grant Date Fair Value
	Unvested balances at January 1, 2014		3,826,470		$	25.96		1,915,601		$	30.03
	Granted		1,194,225	-1		36.86		882,637	-2		40.34
	Vested		-1,513,633			23.28		-56,659			25.28
	Forfeited		-236,798			29.56		-131,536			28.53
	Unvested balances at September 30, 2014		3,270,264		$	30.94		2,610,043		$	33.70
	(1)   Primarily reflects our company-wide equity grant issued in March 2014, as discussed above.
	(2) PSUs granted in 2014 reflect awards issued to certain officers, as described above.

NASDAQ_OMX_Stockholders_Equity1

NASDAQ OMX Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2014
Nasdaq Stockholders' Equity [Abstract]	'
Schedule of Dividends Declared	'
	Declaration Date	Dividend Per		Record Date	Total Amount(1)		Payment Date
		Common Share
					(in millions)
	30-Jan-14	$	0.13	14-Mar-14	$	22	28-Mar-14
	27-Mar-14	$	0.15	13-Jun-14	$	25	27-Jun-14
	24-Jul-14	$	0.15	12-Sep-14	$	26	26-Sep-14
	(1)   These amounts were recorded in retained earnings in the Condensed Consolidated Balance Sheets at September 30, 2014.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Summary of Computation of Basic and Diluted Earnings Per Share	'
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
		(in millions, except share and per share amounts)
	Numerator:
	Net income attributable to common shareholders	$	123	$	113	$	328	$	244
	Denominator:
	Weighted-average common shares outstanding for basic earnings per share		168,587,861		167,337,700		169,184,773		166,476,927
	Weighted-average effect of dilutive securities:
	Employee equity awards		3,576,954		3,773,791		3,599,709		3,854,863
	Contingent issuance of common stock(1)		992,247		992,247		330,749		330,749
	Weighted-average common shares outstanding for diluted earnings per share		173,157,062		172,103,738		173,115,231		170,662,539
	Basic and diluted earnings per share:
	Basic earnings per share	$	0.73	$	0.68	$	1.94	$	1.46
	Diluted earnings per share	$	0.71	$	0.66	$	1.89	$	1.43
	(1)   See “Acquisition of eSpeed for Trading of U.S. Treasuries,” of Note 4, “Acquisitions,” for further discussion.

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	'
		30-Sep-14
		Total		Level 1		Level 2		Level 3
		(in millions)
	Financial Assets Measured at Fair Value on a Recurring Basis
	Financial investments, at fair value(1)	$	169	$	169	$	-	$	-
	Default fund and margin deposit investments(2)		2,387		738		1,649		-
	Total	$	2,556	$	907	$	1,649	$	-
		31-Dec-13
		Total		Level 1		Level 2		Level 3
		(in millions)
	Financial Assets Measured at Fair Value on a Recurring Basis
	Financial investments, at fair value(1)	$	189	$	189	$	-	$	-
	Default fund and margin deposit investments(2)		1,867		774		1,093		-
	Total	$	2,056	$	963	$	1,093	$	-
	(1)As of September 30, 2014 and December 31, 2013, Level 1 financial investments, at fair value were primarily comprised of trading securities, mainly Swedish government debt securities.  Of these securities,  $156 million as of September 30, 2014 and $167 million as of December 31, 2013 are assets utilized to meet regulatory capital requirements, primarily for the clearing operations of  Nasdaq Nordic Clearing.
	(2)Default fund and margin deposit investments include cash contributions invested by Nasdaq Nordic Clearing, in accordance with its investment policy, either in highly rated government debt securities or reverse repurchase agreements with highly rated government debt securities as collateral. Of the total balance of $2,513 million recorded in the Condensed Consolidated Balance Sheets as of September 30, 2014,  $1,649 million of cash contributions have been invested in reverse repurchase agreements and $738 million of cash contributions have been invested in highly rated government debt securities and time deposits. The remainder of this balance is held in cash. Of the total balance of $1,961 million recorded in the Condensed Consolidated Balance Sheets as of December 31, 2013,  $1,093 million of cash contributions were invested in reverse repurchase agreements and $774 million of cash contributions were invested in highly rated government debt securities. The remainder of this balance was held in cash.

Clearing_Operations_Tables

Clearing Operations (Tables)	9 Months Ended
	Sep. 30, 2014
Clearing Operations [Abstract]	'
Schedule of Clearing Member Default Fund Contributions	'
		30-Sep-14
		Cash Contributions(1)(2)		Non-Cash Contributions		Total Contributions
		(in millions)
	Default fund contributions	$	296	$	82	$	378
	Margin deposits		2,217		6,285		8,502
	Total	$	2,513	$	6,367	$	8,880
	(1)As of September 30, 2014, in accordance with its investment policy, Nasdaq Nordic Clearing has invested cash contributions of $1,649 million in reverse repurchase agreements and $738 million in highly rated government debt securities and time deposits. The remainder of this balance is held in cash.
	(2)Pursuant to clearing member agreements, we pay interest on cash contributions to clearing members.
Schedule of Derivative Contracts Outstanding	'
	The market value of derivative contracts outstanding prior to netting was as follows:
		30-Sep-14
		(in millions)
	Commodity options, futures and forwards(1)(2)(3)	$	987
	Fixed-income options and futures(2)(3)		611
	Stock options and futures(2)(3)		161
	Index options and futures(2)(3)		219
	Seafood options and futures(2)(3)		-
	Total	$	1,978
	(1)We determined the fair value of our forward contracts using standard valuation models that were based on market-based observable inputs including LIBOR rates and the spot price of the underlying instrument.
	(2)We determined the fair value of our option contracts using standard valuation models that were based on market-based observable inputs including implied volatility, interest rates and the spot price of the underlying instrument.
	(3)We determined the fair value of our futures contracts based upon quoted market prices and average quoted market yields.
Schedule of Derivative Contracts Cleared	'
	The total number of derivative contracts cleared through Nasdaq Nordic Clearing for the nine months ended September 30, 2014 and 2013 was as follows:
		30-Sep-14		30-Sep-13
	Commodity options, futures and forwards(1)		1,705,947		2,217,572
	Fixed-income options and futures		14,270,232		21,131,906
	Stock options and futures		24,426,440		23,200,139
	Index options and futures		29,705,046		29,892,938
	Seafood options and futures		69,488		1,700
	Total		70,177,153		76,444,255
	(1)The total volume in cleared power related to commodity contracts was 1,150 Terawatt hours (TWh) for the nine months ended September 30, 2014 and 1,247 TWh for the nine months ended September 30, 2013.

Business_Segments_Tables

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2014
Text Block [Abstract]	'
Schedule of Operating Segments	'
	The following table presents certain information regarding these operating segments for the three and nine months ended September 30, 2014 and 2013.
		Market Services		Listing Services		Information Services		Technology Solutions		Corporate Items and Eliminations		Consolidated
		(in millions)
	Three Months Ended September 30, 2014
	Total revenues	$	515	$	59	$	114	$	130	$	-	$	818
	Cost of revenues		-321		-		-		-		-		-321
	Revenues less transaction rebates, brokerage, clearance and exchange fees		194		59		114		130		-		497
	Operating income (loss)(1)	$	89	$	25	$	82	$	17	$	-6	$	207
	Three Months Ended September 30, 2013
	Total revenues	$	499	$	57	$	117	$	132	$	-	$	805
	Cost of revenues		-299		-		-		-		-		-299
	Revenues less transaction rebates, brokerage, clearance and exchange fees		200		57		117		132		-		506
	Operating income (loss)(2)	$	85	$	22	$	87	$	8	$	-	$	202
	Nine Months Ended September 30, 2014
	Total revenues	$	1,640	$	177	$	360	$	403	$	-	$	2,580
	Cost of revenues		-1,031		-		-		-		-		-1,031
	Revenues less transaction rebates, brokerage, clearance and exchange fees		609		177		360		403		-		1,549
	Operating income (loss)(3)	$	271	$	70	$	264	$	36	$	-60	$	581
	Nine Months Ended September 30, 2013
	Total revenues	$	1,559	$	170	$	329	$	304	$	-	$	2,362
	Cost of revenues		-987		-		-		-		-		-987
	Revenues less transaction rebates, brokerage, clearance and exchange fees		572		170		329		304		-		1,375
	Operating income (loss)(4)	$	234	$	69	$	246	$	18	$	-117	$	450
	(1)   Corporate items and eliminations for the three months ended September 30, 2014 primarily include merger and strategic initiatives expense of $5 million primarily related to the acquisition of the TR Corporate businesses.
	(2)   Corporate items and eliminations for the three months ended September 30, 2013 primarily include merger and strategic initiatives expense of $8 million primarily related to the acquisitions of eSpeed and the TR Corporate businesses. These amounts were offset by the remeasurement of a contingent purchase price liability related to the BWise acquisition due to changes in the anticipated performance of BWise.
	(3)   Corporate items and eliminations for the nine months ended September 30,  2014 primarily include merger and strategic initiatives expense of $46 million primarily related to the acquisition of the TR Corporate businesses and other strategic initiatives  and a loss on debt extinguishment of $9 million.
	(4)   Corporate items and eliminations for the nine months ended September 30, 2013 primarily include expense related to the one-time program for voluntary accommodations to qualifying members of up to $62 million. This program expanded the pool available to compensate members of The NASDAQ Stock Market for qualified losses arising directly from the system issues experienced with the Facebook IPO that occurred on May 18, 2012. Our liability was reduced to $44 million and payment of valid claims totaling $44 million was made in the fourth quarter of 2013. Corporate items and eliminations also include merger and strategic initiatives expense of $33 million primarily related to our acquisitions of eSpeed and the TR Corporate businesses, expense related to an SEC matter of $10 million,  and restructuring charges of $9 million.

Organization_and_Nature_of_Ope1

Organization and Nature of Operations (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
	item	item
	country
Organization and Nature of Operations [Abstract]	'	'
Total number of U.S. listed companies	'	2,746
Approximate combined market capitalization, U.S.	$7,600,000,000,000	$7,600,000,000,000
Total number of listed companies within Nordic and Baltic exchanges	778	778
Approximate combined market capitalization, Nordic and Baltic	1,300,000,000,000	1,300,000,000,000
Number of Indexes that Nasdaq calculate and distribute	41,000	41,000
AssetsUnderManagement	$96,000,000,000	$96,000,000,000
Market Technology segment delivers services, exchanges	70	'
Market Technology segment delivers services, countries	50	'

Basis_of_Presentation_and_Prin2

Basis of Presentation and Principles of Consolidation (Details) (USD $)

3 Months Ended

9 Months Ended

15 Months Ended

21 Months Ended

48 Months Ended

69 Months Ended

21 Months Ended

9 Months Ended

In Millions, except Per Share data, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2012

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Finnish Tax Authority [Member]

Finnish Tax Authority [Member]

Finnish Tax Authority [Member]

Swedish Supreme Administrative Court [Member]

Swedish Tax Agency [Member]

Minimum [Member]

Maximum [Member]

FI

FI

FI

SE

SE

Swedish Supreme Administrative Court [Member]

Swedish Supreme Administrative Court [Member]

SE

SE

Income Tax Examination [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Income tax benefit (expense)

$104

($65)

$166

$118

'

'

'

'

'

'

'

'

Tax benefit

-56

-58

-170

-122

'

'

'

'

'

'

'

'

Current Income Tax Expense Benefit

56

58

170

122

'

'

'

'

'

'

'

'

Effective Income Tax Rate Continuing Operations

31.00%

'

'

33.00%

34.00%

'

'

'

'

'

'

'

Tax Benefits recorded

'

'

'

'

'

33

'

33

28

16

'

'

Recurring quarterly tax benefits

'

'

'

'

'

'

'

'

'

'

4

5

Income Tax Examination, Penalties and Interest Expense

'

'

'

'

'

'

11

'

'

'

'

'

Foreign Income Tax Expense (Benefit), Continuing Operations

'

'

'

'

'

8

'

22

'

'

'

'

Foreign income tax expense benefit, per diluted share

'

'

'

'

'

'

'

'

$0.16

'

'

'

Income Taxes Paid

'

'

'

'

'

'

$14

'

'

'

'

'

Restructuring_Charges_Narrativ

Restructuring Charges (Narrative) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]	'	'
Restructuring and other charges	$9	'
Number of positions eliminated	31	'
Severance [Member]	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Restructuring and other charges	6	'
Reserve, current	'	3
Facilities-related [Member]	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Restructuring and other charges	1	'
Reserve, current	'	1
Asset impairments [Member]	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Restructuring and other charges	1	'
Other Restructuring [Member]	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Restructuring and other charges	$1	'

Restructuring_Charges_Summary_

Restructuring Charges (Summary of Restructuring Charges) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]	'
Total restructuring charges	$9
Severance [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Total restructuring charges	6
Facilities-related [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Total restructuring charges	1
Asset impairments [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Total restructuring charges	1
Other Restructuring [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Total restructuring charges	$1

Acquisitions_and_Divestitures_1

Acquisitions and Divestitures (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

15 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Apr. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Mar. 31, 2014

31-May-13

31-May-13

31-May-13

Apr. 30, 2013

Jun. 28, 2013

Jun. 28, 2013

Jun. 28, 2013

Jun. 28, 2013

3.875% senior unsecured notes due June 7, 2021 [Member]

2011 Credit Facility [Member]

Customer relationships [Member]

Customer relationships [Member]

Technology [Member]

Technology [Member]

BWise [Member]

TR Businesses [Member]

TR Businesses [Member]

TR Businesses [Member]

TOM [Member]

eSpeed [Member]

eSpeed [Member]

eSpeed [Member]

eSpeed [Member]

Customer relationships [Member]

Technology [Member]

Customer relationships [Member]

Technology [Member]

Trade Names [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase consideration

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$366

'

'

'

$1,239

'

'

'

Net assets acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-37

'

'

'

5

'

'

'

Purchased Intangible Assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

91

'

'

'

715

121

16

578

Percentage of acquired ownership interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

28.00%

'

'

'

25.00%

100.00%

'

'

'

Purchase consideration includes working capital adjustments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

390

'

'

'

'

'

'

'

Business acquisition, cash paid

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

366

'

'

'

755

'

'

'

Business acquisition, working capital adjustments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

24

'

'

'

'

'

'

'

Finite-lived Intangible Assets Acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

91

89

2

'

'

'

'

'

Contingent future issuance of common stock, amount

'

'

484

'

484

'

'

'

'

'

'

'

'

'

'

'

'

'

'

484

'

'

'

Contingent future issuance of common stock, shares

992,247

[1]

'

992,247

[1]

330,749

[1]

330,749

[1]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

992,247

'

'

'

Consolidated Amount of Revenue required to triger annual issuance of NASDAQ OMX common stock

'

'

'

25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, interest rate

'

'

'

'

'

'

'

'

3.88%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument Maturity Date

'

'

'

'

'

'

'

'

7-Jun-21

19-Sep-16

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquired Finite Lived Intangible Assets Weighted Average Useful Life

'

'

'

'

'

'

'

'

'

'

'20 years

'19 years

'5 years

'5 years

'

'

'

'

'

'

'

'

'

Effective income tax rate

31.00%

'

'

'

33.00%

34.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchased goodwill

5,802

'

'

5,802

'

5,802

6,186

'

'

'

'

'

'

'

'

312

'

'

'

519

'

'

'

Option to acquire additional ownership percentage

'

'

'

'

'

'

'

25.10%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncash Merger Related Costs

'

18

'

20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Cost and Expense Disclosure, Operating

'

'

'

'$28

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, additional borrowings

'

'

'

'

'

'

'

'

'

$118

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

See bAcquisition of eSpeed for Trading of U.S. Treasuries,b of Note 4, bAcquisitions,b for further discussion.

Acquisitions_and_Divestitures_2

Acquisitions and Divestitures (Schedule Of Acquisition) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Jun. 28, 2013	31-May-13
In Millions, unless otherwise specified			eSpeed [Member]	TR Businesses [Member]
Business Acquisition [Line Items]	'	'	'	'
Purchase consideration	'	'	$1,239	$366
Net assets acquired	'	'	5	-37
Purchased Intangible Assets	'	'	715	91
Goodwill	$5,802	$6,186	$519	$312

Goodwill_and_Purchased_Intangi2

Goodwill and Purchased Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Goodwill [Line Items]	'	'	'	'
Goodwill expected to be deductible in future periods	$869	'	$869	'
Amortization expense for purchased finite-lived intangible assets	17	18	53	44
Non-cash intangible asset impairment charges	'	'	'	10
Customer relationships [Member]	'	'	'	'
Goodwill [Line Items]	'	'	'	'
Non-cash intangible asset impairment charges	'	'	'	7
Trade Names [Member]	'	'	'	'
Goodwill [Line Items]	'	'	'	'
Non-cash intangible asset impairment charges	'	'	'	3
eSpeed [Member]	'	'	'	'
Goodwill [Line Items]	'	'	'	'
Goodwill expected to be deductible in future periods	517	'	517	'
TR Businesses [Member]	'	'	'	'
Goodwill [Line Items]	'	'	'	'
Goodwill expected to be deductible in future periods	$284	'	$284	'

Goodwill_and_Purchased_Intangi3

Goodwill and Purchased Intangible Assets (Schedule of Changes in Goodwill) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Goodwill [Line Items]	'
Balance	$6,186
Foreign currency translation adjustment	-384
Balance	5,802
Market Services [Member]	'
Goodwill [Line Items]	'
Balance	3,433
Foreign currency translation adjustment	-211
Balance	3,222
Listing Services [Member]	'
Goodwill [Line Items]	'
Balance	136
Foreign currency translation adjustment	-7
Balance	129
Information Services [Member]	'
Goodwill [Line Items]	'
Balance	2,019
Foreign currency translation adjustment	-124
Balance	1,895
Technology Solutions [Member]	'
Goodwill [Line Items]	'
Balance	598
Foreign currency translation adjustment	-42
Balance	$556

Goodwill_and_Purchased_Intangi4

Goodwill and Purchased Intangible Assets (Finite-Lived and Indefinite-Lived Intangible Assets) (Details) (USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total finite-lived intangible assets, Gross Amount	$1,038	$1,122
Accumulated Amortization	-318	-307
Total	720	815
Total indefinite-lived intangible assets, Net Amount	1,493	1,571
Total Intangible Assets, Gross Amount	2,531	2,693
Total Intangible Assets, Net Amount	2,213	2,386
Exchange and clearing registrations [Member]	'	'
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total indefinite-lived intangible assets, Net Amount	790	790
Trade Names [Member]	'	'
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total indefinite-lived intangible assets, Net Amount	756	756
Licenses [Member]	'	'
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total indefinite-lived intangible assets, Net Amount	51	51
Foreign currency translation adjustment [Member]	'	'
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total indefinite-lived intangible assets, Net Amount	-104	-26
Technology [Member]	'	'
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total finite-lived intangible assets, Gross Amount	37	39
Accumulated Amortization	-15	-12
Total	22	27
Total finite-lived intangible assets, Weighted-Average Useful Life (in Years)	'5 years	'5 years
Customer relationships [Member]	'	'
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total finite-lived intangible assets, Gross Amount	1,047	1,075
Accumulated Amortization	-314	-292
Total	733	783
Total finite-lived intangible assets, Weighted-Average Useful Life (in Years)	'20 years	'19 years
Other [Member]	'	'
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total finite-lived intangible assets, Gross Amount	5	5
Accumulated Amortization	-3	-3
Total	2	2
Total finite-lived intangible assets, Weighted-Average Useful Life (in Years)	'9 years	'8 years
Foreign currency translation adjustment [Member]	'	'
Finite Lived And Indefinite Lived Intangible Assets [Line Items]	'	'
Total finite-lived intangible assets, Gross Amount	-51	3
Accumulated Amortization	14	'
Total	($37)	$3

Goodwill_and_Purchased_Intangi5

Goodwill and Purchased Intangible Assets (Estimated Future Amortization Expense) (Details) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'
2014	$17	[1]
2015	68
2016	67
2017	65
2018	61
2019 and thereafter	479
Total	$757
[1]	Represents the estimated amortization to be recognized for the remaining three months of 2014.

Investments_Details

Investments (Details) (USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2014	Dec. 31, 2013
Investments, Debt and Securities [Line Items]	'	'	'	'
Trading securities	'	'	$169	$189
Equity method investments	'	'	26	30
Carrying cost of Investment	'	'	140	'
Income Loss From Equity Method Investments	1	1	'	'
LCH Invetment [Member]	'	'	'	'
Investments, Debt and Securities [Line Items]	'	'	'	'
Carrying cost of Investment	'	'	'	65
Cost Method Investment Ownership Percentage	'	'	5.00%	5.00%
Borsa Istanbul Cost Method Investment[Member]	'	'	'	'
Investments, Debt and Securities [Line Items]	'	'	'	'
Carrying cost of Investment	'	'	75	'
Cost Method Investment Ownership Percentage	'	'	5.00%	'
Foreign Government Debt Securities [Member]	'	'	'	'
Investments, Debt and Securities [Line Items]	'	'	'	'
Trading securities	'	'	$156	$167
EMCF [Member]	'	'	'	'
Investments, Debt and Securities [Line Items]	'	'	'	'
Equity Method Investment Ownership Percentage	22.00%	22.00%	'	'
EuroCCP [Member]	'	'	'	'
Investments, Debt and Securities [Line Items]	'	'	'	'
Equity Method Investment Ownership Percentage	'	'	25.00%	'

Deferred_Revenue_Estimated_Def

Deferred Revenue (Estimated Deferred Revenue) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013		Dec. 31, 2012
In Millions, unless otherwise specified
Deferred Revenue Arrangement [Line Items]	'		'		'		'
2014	$113	[1]	'		'		'
2015	96		'		'		'
2016	64		'		'		'
2017	58		'		'		'
2018	47		'		'		'
2019 and thereafter	34		'		'		'
Deferred revenue estimated revenue to be recognized	412		294		339		295
Initial Listing Revenues [Member]	'		'		'		'
Deferred Revenue Arrangement [Line Items]	'		'		'		'
2014	4	[1]	'		'		'
2015	14		'		'		'
2016	11		'		'		'
2017	9		'		'		'
2018	7		'		'		'
2019 and thereafter	6		'		'		'
Deferred revenue estimated revenue to be recognized	51		41		38		36
Listing of Additional Shares Revenues [Member]	'		'		'		'
Deferred Revenue Arrangement [Line Items]	'		'		'		'
2014	9	[1]	'		'		'
2015	32		'		'		'
2016	23		'		'		'
2017	14		'		'		'
2018	3		'		'		'
Deferred revenue estimated revenue to be recognized	81		75		76		78
Annual Renewal and Other Revenues [Member]	'		'		'		'
Deferred Revenue Arrangement [Line Items]	'		'		'		'
2014	54	[1]	'		'		'
2015	2		'		'		'
2016	1		'		'		'
Deferred revenue estimated revenue to be recognized	57		20		64		32
Technology Solutions [Member]	'		'		'		'
Deferred Revenue Arrangement [Line Items]	'		'		'		'
2014	46	[1],[2]	'		'		'
2015	48	[2]	'		'		'
2016	29	[2]	'		'		'
2017	35	[2]	'		'		'
2018	37	[2]	'		'		'
2019 and thereafter	28	[2]	'		'		'
Deferred revenue estimated revenue to be recognized	$223	[2],[3]	$158	[3]	$161	[3]	$149	[3]
[1]	Represents deferred revenue that is anticipated to be recognized over the remaining three months of 2014.
[2]	The timing of recognition of our deferred Technology Solutions revenues is primarily dependent upon the completion of customization and any significant modifications made pursuant to existing Market Technology contracts and the timing of Corporate Solutions subscription-based contracts. As such, as it relates to Market Technology revenues, the timing represents our best estimate.
[3]	Technology Solutions deferred revenues primarily include revenues from our Market Technology delivered client contracts in the support phase charged during the period and our Corporate Solutions subscription based contracts, which are primarily billed quarterly in advance. For our Market Technology contracts, where customization and significant modifications to the software are made to meet the needs of our customers, total revenues, as well as costs incurred, are deferred until significant modifications are completed and delivered. Once delivered, deferred revenue and the related deferred costs are recognized over the post contract support period. For these Market Technology contracts, we have included the deferral of costs in other current assets and other non-current assets in the Condensed Consolidated Balance Sheets. The amortization of Technology Solutions deferred revenue primarily includes revenues earned from Market Technology client contracts and Corporate Solutions subscription based contracts recognized during the period.

Deferred_Revenue_Changes_in_De

Deferred Revenue (Changes in Deferred Revenue) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Deferred Revenue Arrangement [Line Items]	'		'
Balance	$294		$295
Additions	733	[1]	411	[1]
Amortization	-596	[1]	-372	[1]
Translation adjustment	-19		5
Balance	412		339
Initial Listing Revenues [Member]	'		'
Deferred Revenue Arrangement [Line Items]	'		'
Balance	41		36
Additions	20	[1]	12	[1]
Amortization	-10	[1]	-10	[1]
Balance	51		38
Listing of Additional Shares Revenues [Member]	'		'
Deferred Revenue Arrangement [Line Items]	'		'
Balance	75		78
Additions	36	[1]	28	[1]
Amortization	-30	[1]	-30	[1]
Balance	81		76
Annual Renewal and Other Revenues [Member]	'		'
Deferred Revenue Arrangement [Line Items]	'		'
Balance	20		32
Additions	214	[1]	215	[1]
Amortization	-175	[1]	-177	[1]
Translation adjustment	-2		-6
Balance	57		64
Technology Solutions [Member]	'		'
Deferred Revenue Arrangement [Line Items]	'		'
Balance	158	[2]	149	[2]
Additions	463	[1],[2]	156	[1],[2]
Amortization	-381	[1],[2]	-155	[1],[2]
Translation adjustment	-17	[2]	11	[2]
Balance	223	[2],[3]	161	[2]
Borsa Istanbul Cost Method Investment[Member]	'		'
Deferred Revenue Arrangement [Line Items]	'		'
Additions	$75		'
[1]	The additions and amortization for initial listing revenues, listing of additional shares revenues and annual renewal and other revenues primarily reflect revenues from our U.S. Listing Services business. The additions to Technology Solutions revenues during the nine months ended September 30, 2014 include $75 million related to the Borsa Istanbul market technology agreement. See bCost Method Investments,b of Note 6, bInvestments,b for further discussion.
[2]	Technology Solutions deferred revenues primarily include revenues from our Market Technology delivered client contracts in the support phase charged during the period and our Corporate Solutions subscription based contracts, which are primarily billed quarterly in advance. For our Market Technology contracts, where customization and significant modifications to the software are made to meet the needs of our customers, total revenues, as well as costs incurred, are deferred until significant modifications are completed and delivered. Once delivered, deferred revenue and the related deferred costs are recognized over the post contract support period. For these Market Technology contracts, we have included the deferral of costs in other current assets and other non-current assets in the Condensed Consolidated Balance Sheets. The amortization of Technology Solutions deferred revenue primarily includes revenues earned from Market Technology client contracts and Corporate Solutions subscription based contracts recognized during the period.
[3]	The timing of recognition of our deferred Technology Solutions revenues is primarily dependent upon the completion of customization and any significant modifications made pursuant to existing Market Technology contracts and the timing of Corporate Solutions subscription-based contracts. As such, as it relates to Market Technology revenues, the timing represents our best estimate.

Debt_Obligations_Narrative_Det

Debt Obligations (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

6 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Jan. 31, 2010

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2010

Sep. 30, 2014

Sep. 30, 2014

31-May-14

Sep. 30, 2014

Sep. 30, 2011

Sep. 30, 2011

Sep. 30, 2011

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Senior Unsecured Notes [Member]

Senior Unsecured Notes [Member]

Quarterly payments [Member]

Optional payments [Member]

4.00% Senior Notes Due 2015 [Member]

5.55% Senior Notes Due 2020 [Member]

5.25% Senior Unsecured Notes Due January 16, 2018 [Member]

5.25% Senior Unsecured Notes Due January 16, 2018 [Member]

4.25% Senior Unsecured Notes Due June, 1 2024 [Member]

4.25% Senior Unsecured Notes Due June, 1 2024 [Member]

4.25% Senior Unsecured Notes Due June, 1 2024 [Member]

2011 Credit Facility [Member]

2011 Credit Facility [Member]

2011 Credit Facility [Member]

2011 Credit Facility [Member]

Clearinghouse Credit Facilities [Member]

Clearinghouse Credit Facilities [Member]

3.875% senior unsecured notes due June 7, 2021 [Member]

3.875% senior unsecured notes due June 7, 2021 [Member]

2016 Term Loan [Member]

Revolving Credit Facility [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, principal outstanding

'

'

'

'

'

'

'

'

'

$400,000,000

$600,000,000

'

'

'

'

$500,000,000

'

'

'

'

'

'

'

'

Debt instrument, interest rate

'

'

'

'

'

'

'

'

'

'

5.55%

5.25%

'

4.25%

4.25%

'

'

'

'

'

'

'

3.88%

'

Debt instrument, maturity date

'

'

'

'

'

'

'

'

'

'

15-Jan-20

16-Jan-18

'

'

1-Jun-24

'

19-Sep-16

'

'

'

'

'

7-Jun-21

'

Debt instrument, face amount

'

'

'

'

'

'

1,000,000,000

'

'

'

'

'

370,000,000

'

'

'

'

'

'

'

'

'

'

'

Debt issuance costs

'

'

'

'

'

5,000,000

'

'

'

'

'

3,000,000

'

4,000,000

4,000,000

'

5,000,000

'

'

'

'

'

7,000,000

'

Total debt obligations

2,345,000,000

'

2,345,000,000

'

2,634,000,000

'

'

'

'

'

599,000,000

368,000,000

'

498,000,000

[1]

498,000,000

[1]

'

'

'

'

'

'

'

757,000,000

[1]

824,000,000

[1]

Debt instrument, interest rate, maximum

'

'

'

'

'

'

'

'

'

'

'

7.25%

'

6.25%

'

'

'

'

'

'

'

'

5.88%

'

Percentage of aggregate principal owed upon triggering event

'

'

'

'

'

'

'

'

'

'

'

101.00%

'

101.00%

'

'

'

'

'

'

'

'

101.00%

'

Credit facility, borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,200,000,000

1,200,000,000

450,000,000

750,000,000

253,000,000

312,000,000

'

'

Line of credit, outstanding amount

'

'

'

'

11,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

11,000,000

'

'

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax

-287,000,000

147,000,000

-424,000,000

-5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

67,000,000

'

Proceed from term loan

'

'

616,000,000

'

'

'

'

'

'

'

'

'

'

'

498,000,000

[1]

'

'

'

'

'

'

'

'

'

Credit facility, additional borrowings

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

118,000,000

'

'

'

'

'

'

'

Credit facility, available capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

750,000,000

'

'

'

'

'

'

'

Repayment of loan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

450,000,000

'

'

'

'

'

'

Debt Instrument Decrease Repayments

'

'

905,000,000

'

'

'

'

-22,000,000

-204,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

67,000,000

[1]

'

Line of credit facility, available liquidity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

211,000,000

219,000,000

'

'

Credit facility satisfy regulatory requirements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$42,000,000

$93,000,000

'

'

[1]

See bSenior Unsecured Notesb below for further discussion.

Debt_Obligations_Changes_in_De

Debt Obligations (Changes in Debt Obligations) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Debt Instrument [Line Items]	'		'
Total debt obligations	$2,345		$2,634
Less current portion	'		-45
Total long-term debt obligations	2,345		2,589
Proceed from term loan	616		'
Payments Of Debt Extinguishment Costs	9		'
Payments, Conversions, Accretion and Other	-905		'
4.00% senior unsecured notes due January 15, 2015 [Member]	'		'
Debt Instrument [Line Items]	'		'
Total debt obligations	'		400
Payments, Conversions, Accretion and Other	-400		'
5.55% senior unsecured notes due January 15, 2020 [Member]	'		'
Debt Instrument [Line Items]	'		'
Total debt obligations	599	[1]	598	[1]
Payments, Conversions, Accretion and Other	1	[1]	'
5.25% senior unsecured notes due January 16, 2018 [Member]	'		'
Debt Instrument [Line Items]	'		'
Total debt obligations	368	[1]	368	[1]
3.875% senior unsecured notes due June 7, 2021 [Member]	'		'
Debt Instrument [Line Items]	'		'
Total debt obligations	757	[1]	824	[1]
Payments, Conversions, Accretion and Other	-67	[1]	'
4.25% Senior Unsecured Notes Due June, 1 2024 [Member]	'		'
Debt Instrument [Line Items]	'		'
Total debt obligations	498	[1]	'
Proceed from term loan	498	[1]	'
Payments Of Debt Extinguishment Costs	9		'
$450 million senior unsecured term loan facility credit agreement due September 19, 2016 [Member]	'		'
Debt Instrument [Line Items]	'		'
Total debt obligations	123	[2]	349	[2]
Payments, Conversions, Accretion and Other	-226	[2]	'
$750 million revolving credit commitment due September 19, 2016 [Member]	'		'
Debt Instrument [Line Items]	'		'
Total debt obligations	'		95	[2]
Proceed from term loan	118	[2]	'
Payments, Conversions, Accretion and Other	-213	[2]	'
Debt Current [Member]	'		'
Debt Instrument [Line Items]	'		'
Less current portion	'		-45
Payments, Conversions, Accretion and Other	45		'
Debt Non Current [Member]	'		'
Debt Instrument [Line Items]	'		'
Total long-term debt obligations	2,345		2,589
Proceed from term loan	616		'
Payments, Conversions, Accretion and Other	($860)		'
[1]	See bSenior Unsecured Notesb below for further discussion.
[2]	See b2011 Credit Facilityb below for further discussion.

Debt_Obligations_Changes_in_De1

Debt Obligations (Changes in Debt Obligations Additional Information) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2011
4.00% senior unsecured notes due January 15, 2015 [Member]	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, interest rate	4.00%	'
Debt instrument, maturity date	18-Jun-14	'
5.55% senior unsecured notes due January 15, 2020 [Member]	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, interest rate	5.55%	'
Debt instrument, maturity date	15-Jan-20	'
5.25% senior unsecured notes due January 16, 2018 [Member]	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, interest rate	5.25%	'
Debt instrument, maturity date	16-Jan-18	'
$450 million senior unsecured term loan facility credit agreement due September 19, 2016 [Member]	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, maturity date	19-Sep-16	'
Debt instrument, principal outstanding	$450	'
Debt Instrument, interest rate during period	1.53%	'
$750 million revolving credit commitment due September 19, 2016 [Member]	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, maturity date	19-Sep-16	'
Debt Instrument, interest rate during period	1.33%	'
Credit facility, borrowing capacity	750	'
2011 Credit Facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, maturity date	19-Sep-16	'
Credit facility, borrowing capacity	$1,200	$1,200
3.875% senior unsecured notes due June 7, 2021 [Member]	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, interest rate	3.88%	'
Debt instrument, maturity date	7-Jun-21	'

Employee_Benefits_Narrative_De

Employee Benefits (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Benefit cost	'	$1	$1	$4
Common stock shares reserved for future issuance	7.3	'	7.3	'
Compensation expenses	1	1	2	2
Savings Plan [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Defined contributions plan expense	2	'	7	4
Employer retirement contributions [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Defined contributions plan expense	1	3	2	4
Non-U.S. Benefit Plans [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Cost or expenses included in compensation and benefit expense	$5	$5	$15	$15
Pension [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Percentage of employer contributions	'	'	100.00%	'
Percentage of eligible employee contributions receiving employer contributions	'	'	6.00%	4.00%
Share-based compensation [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Common stock shares reserved for future issuance	2.9	'	2.9	'
Offering periods for ESPP shares, months	'	'	'6 months	'
Percentage of fair market value of common stock	'	'	85.00%	'
Percentage of discount to employees on purchase of common stock under ESPP	'	'	15.00%	'

Employee_Benefits_Components_o

Employee Benefits (Components of Net Periodic Benefit Cost) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Components of net periodic benefit cost	'	'	'	'
Interest cost	$1	$1	$4	$4
Expected return on plan assets	-1	-1	-4	-4
Recognized net actuarial loss	'	1	1	3
Curtailment loss	'	'	'	1
Net periodic benefit cost	'	$1	$1	$4

ShareBased_Compensation_Narrat

Share-Based Compensation (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Mar. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

PSUs [Member]

PSUs [Member]

PSUs [Member]

PSUs [Member]

Restricted stock [Member]

Restricted stock and PSU's [Member]

Minimum [Member]

Maximum [Member]

item

Chief executive officer's and executive vice presidents' [Member]

Senior vice presidents' [Member]

Restricted stock [Member]

Restricted stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Restricted stock vesting range

'

'

'

'

'

'

'

'

'

'

'3 years

'5 years

General expiration period of stock options

'

'

'

'

'

'

'

'

'10 years

'

'

'

Grant vesting period, expectation exceeds, years

'

'

'

'

'

'

'

'

'third

'

'

'

Grant vesting period, expectation met, years

'

'

'

'

'

'

'

'

'fourth

'

'

'

Grant vesting period, expectation not met, years

'

'

'

'

'

'

'

'

'fifth

'

'

'

Percentage of target amount granted, minimum

'

'

'

'

'

0.00%

'

'

'

'

'

'

Percentage of target amount granted, maximum

'

'

'

'

'

150.00%

'

'

'

'

'

'

Chief executive officer's and executive vice presidents' long-term stock-based compensation

'

'

'

'

'

'

100.00%

50.00%

'

'

'

'

Performance period (year)

'

'

'

'

'

'3 years

'

'

'

'

'

'

Number of peer groups

'

'

'

'

'

2

'

'

'

'

'

'

Performance-based long-term incentive program weighted percentage

'

'

'

'

'

50.00%

'

'

'

'

'

'

Minimum payout

'

'

'

'

'

0.00%

'

'

'

'

'

'

Maximum payout

'

'

'

'

'

200.00%

'

'

'

'

'

'

Grants received by certain executive officers and a select group of non officer employees

'

'

818,307

'

553,846

264,461

'

'

'

'

'

'

Additional PSU's Granted

'

'

'

'

64,330

'

'

'

'

'

'

'

Common stock shares reserved for future issuance

7,300,000

'

7,300,000

'

'

'

'

'

'

'

'

'

ESPP discount from market price

'

'

15.00%

'

'

'

'

'

'

'

'

'

Net cash proceeds from the exercise of stock options

$11

$2

$24

$18

'

'

'

'

'

'

'

'

Stock options exercised in period

527,225

171,458

1,222,139

[1]

1,730,647

'

'

'

'

'

'

'

'

Stock options, exercisable

3,662,897

[1]

3,800,000

3,662,897

[1]

3,800,000

'

'

'

'

'

'

'

'

Weighted-average exercise price

$27

$25.06

$27

$25.06

'

'

'

'

'

'

'

'

Total fair value of stock option vested

'

'

11

'

'

'

'

'

'

'

'

'

Total pre-tax intrinsic value of stock options exercised

11

3

24

36

'

'

'

'

'

'

'

'

Stock options, granted

'

'

0

'

'

'

'

'

'

'

'

'

Closing stock price

$42.42

'

$42.42

'

'

'

'

'

'

'

'

'

Total number of in-the-money stock options exercisable

3,600,000

'

3,600,000

'

'

'

'

'

'

'

'

'

Total unrecognized compensation cost

'

'

'

'

'

'

'

'

'

$101

'

'

Weighted-average period unrecognized compensation cost is expected to be recognized, in years

'

'

'

'

'

'

'

'

'

'1 year 8 months 12 days

'

'

[1]

No stock option awards were granted during the three and nine months ended September 30, 2014.

ShareBased_Compensation_Summar

Share-Based Compensation (Summary of Share-Based Compensation Expense) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-Based Compensation [Abstract]	'	'	'	'
Share-based compensation expense before income taxes	$15	$14	$45	$32
Income tax benefit	-6	-6	-19	-13
Share-based compensation expense after income taxes	$9	$8	$26	$19

ShareBased_Compensation_Summar1

Share-Based Compensation (Summary of Stock Option Activity) (Details) (USD $)	3 Months Ended			9 Months Ended			12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Share-Based Compensation [Abstract]	'		'	'		'	'
Number of Stock Options Outstanding, Beginning of period	'		'	4,926,522	[1]	'	'
Number of Stock Options, Exercised	-527,225		-171,458	-1,222,139	[1]	-1,730,647	'
Number of Stock Options, Forfeited or expired	'		'	-31,464	[1]	'	'
Number of Stock Options Outstanding, End of period	3,672,919	[1]	'	3,672,919	[1]	'	4,926,522	[1]
Stock options, exercisable	3,662,897	[1]	3,800,000	3,662,897	[1]	3,800,000	'
Weighted-Average Exercise Price, Outstanding Beginning of period	'		'	$25.21		'	'
Weighted-Average Exercise Price, Exercised	'		'	$19.92		'	'
Weighted-Average Exercise Price, Forfeited or expired	'		'	$24.24		'	'
Weighted-Average Exercise Price, Outstanding End of period	$26.98		'	$26.98		'	$25.21
Weighted-average exercise price	$27		$25.06	$27		$25.06	'
Options Outstanding, Weighted-Average Remaining Contractual Term, outstanding (in years)	'		'	'4 years 1 month 17 days		'	'4 years 11 months 19 days
Aggregate Intrinsic Value, Options Outstanding	$57		'	$57		'	$73
Options Outstanding, Weighted-Average Remaining Contractual Term, exercisable (in years)	'		'	'4 years 1 month 13 days		'	'
Aggregate Intrinsic Value, Exercisable	$57		'	$57		'	'
Stock options, granted	'		'	0		'	'
[1]	No stock option awards were granted during the three and nine months ended September 30, 2014.

ShareBased_Compensation_Summar2

Share-Based Compensation (Summary of Restricted Stock and PSU Activity) (Details) (USD $)	9 Months Ended
	Sep. 30, 2014
Restricted stock [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of Awards, Unvested balances	3,826,470
Number of Awards, Granted	1,194,225	[1]
Number of Awards, Vested	-1,513,633
Number of Awards, Forfeited	-236,798
Number of Awards, Unvested balances	3,270,264
Weighted-Average Grant Date Fair Value, Unvested balances	$25.96
Weighted-Average Grant Date Fair Value, Granted	$36.86
Weighted-Average Grant Date Fair Value, Vested	$23.28
Weighted-Average Grant Date Fair Value, Forfeited	$29.56
Weighted-Average Grant Date Fair Value, Unvested balances	$30.94
PSUs [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of Awards, Unvested balances	1,915,601
Number of Awards, Granted	882,637	[2]
Number of Awards, Vested	-56,659
Number of Awards, Forfeited	-131,536
Number of Awards, Unvested balances	2,610,043
Weighted-Average Grant Date Fair Value, Unvested balances	$30.03
Weighted-Average Grant Date Fair Value, Granted	$40.34
Weighted-Average Grant Date Fair Value, Vested	$25.28
Weighted-Average Grant Date Fair Value, Forfeited	$28.53
Weighted-Average Grant Date Fair Value, Unvested balances	$33.70
[1]	Primarily reflects our company-wide equity grant issued in March 2014, as discussed above.
[2]	PSUs granted in 2014 reflect awards issued to certain officers, as described above.

Sharedbased_Compensation_Sched

Shared-based Compensation (Schedule of Weighted- Average Assumptions Used to Determine Weighted-Average Fair Values (Details) (USD $)	9 Months Ended
	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate	0.78%
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate	28.40%	[1]
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value	$42.80
[1]	We use historic volatility for PSU awards issued under the TSR program, as implied volatility cannot be used when simulating multivariate prices for companies in the S&P 500.

Recovered_Sheet1

Nasdaq Omx Stockholders' Equity (Details) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended	1 Months Ended	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2012	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Oct. 31, 2014	Sep. 30, 2014
							Series A Preferred Stock [Member]	Series A Preferred Stock [Member]	Other Repurchases of Common Stock [Member]	Subsequent Event [Member]	Subsequent Event [Member]
Stockholders Equity [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Common stock, shares authorized	300,000,000	'	300,000,000	'	300,000,000	'	'	'	'	'	'
Common stock, shares issued	217,212,427	'	217,212,427	'	214,419,155	'	'	'	'	'	'
Common stock, shares outstanding	168,481,184	'	168,481,184	'	169,357,084	'	'	'	'	'	'
Common stock holder voting rights, maximum percentage of the then-outstanding shares of NASDAQ OMX common stock	5.00%	'	5.00%	'	'	'	'	'	'	'	'
Common stock in treasury, shares	48,731,243	'	48,731,243	'	45,062,071	'	'	'	'	'	'
Share repurchase program, authorized amount	'	'	'	'	'	$300	'	'	'	$500	'
Treasury shares acquired	'	'	3,220,529	321,000	'	'	'	'	606,956	'	'
Average price of repurchased stock	'	'	$37.47	$31.12	'	'	'	'	'	'	'
Aggregate purchase price	'	'	121	10	'	'	'	'	'	'	'
Remaining authorized share repurchase amounts under repurchase program	95	'	95	'	'	'	'	'	'	'	'
Cash paid for repurchase of common stock	'	'	$121	$10	'	'	'	'	'	'	'
Preferred stock, shares authorized	30,000,000	'	30,000,000	'	30,000,000	'	'	'	'	'	'
Preferred stock par value	$0.01	'	$0.01	'	'	'	'	'	'	'	'
Preferred stock, series A convertible preferred stock: shares issued	0	'	0	'	1,600,000	'	0	1,600,000	'	'	'
Preferred stock, series A convertible preferred stock: shares outstanding	0	'	0	'	0	'	'	0	'	'	'
Cash dividend per share	$0.15	$0.13	$0.43	$0.39	'	'	'	'	'	$0.15	'
Dividend declared, date payable	'	'	'	'	'	'	'	'	'	'	26-Dec-14
Dividend declared, record date	'	'	'	'	'	'	'	'	'	'	12-Dec-14

Nasdaq_Stockholders_Equity_Sch

Nasdaq Stockholders' Equity (Schedule of Dividends Declared) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Dividends Payable [Line Items]	'	'	'		'
Dividend Per Common Share	$0.15	$0.13	$0.43		$0.39
January 30, 2014 [Member]	'	'	'		'
Dividends Payable [Line Items]	'	'	'		'
Declaration Date	'	'	30-Jan-14		'
Dividend Per Common Share	'	'	$0.13		'
Record Date	'	'	14-Mar-14		'
Total Amount	'	'	$22	[1]	'
Payment Date	'	'	28-Mar-14		'
March 26, 2014 [Member]	'	'	'		'
Dividends Payable [Line Items]	'	'	'		'
Declaration Date	'	'	27-Mar-14		'
Dividend Per Common Share	'	'	$0.15		'
Record Date	'	'	13-Jun-14		'
Total Amount	'	'	25	[1]	'
Payment Date	'	'	27-Jun-14		'
July 24, 2014 [Member]	'	'	'		'
Dividends Payable [Line Items]	'	'	'		'
Declaration Date	'	'	24-Jul-14		'
Dividend Per Common Share	'	'	$0.15		'
Record Date	'	'	12-Sep-14		'
Total Amount	'	'	$26	[1]	'
Payment Date	'	'	26-Sep-14		'
[1]	These amounts were recorded in retained earnings in the Condensed Consolidated Balance Sheets at September 30, 2014.

Earnings_Per_Share_Narrative_D

Earnings Per Share (Narrative) (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]	'		'	'		'	'
Stock options to purchase shares	3,672,919	[1]	'	3,672,919	[1]	'	4,926,522	[1]
Weighted average number diluted shares outstanding	3,576,954		3,773,791	3,599,709		3,854,863	'
Restricted stock and PSU's [Member]	'		'	'		'	'
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]	'		'	'		'	'
Stock options to purchase shares	5,880,307		6,407,977	5,880,307		6,407,977	'
Weighted average number diluted shares outstanding	5,879,265		4,826,614	5,061,458		4,567,960	'
Stock Options [Member]	'		'	'		'	'
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]	'		'	'		'	'
Weighted average number diluted shares outstanding	3,570,750		4,397,210	3,541,567		4,397,210	'
Common stock [Member]	'		'	'		'	'
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]	'		'	'		'	'
Stock options to purchase shares	3,672,919		5,653,638	3,672,919		5,653,638	'
[1]	No stock option awards were granted during the three and nine months ended September 30, 2014.

Earnings_Per_Share_Summary_of_

Earnings Per Share (Summary of Computation of Basic and Diluted Earnings Per Share) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Earnings Per Share [Abstract]	'		'		'		'
Net income attributable to common shareholders	$123		$113		$328		$244
Weighted-average common shares outstanding for basic earnings per share	168,587,861		167,337,700		169,184,773		166,476,927
Employee equity awards	3,576,954		3,773,791		3,599,709		3,854,863
Contingent issuance of common stock, shares	992,247	[1]	992,247	[1]	330,749	[1]	330,749	[1]
Weighted-average common shares outstanding for diluted earnings per share	173,157,062		172,103,738		173,115,231		170,662,539
Basic earnings per share	$0.73		$0.68		$1.94		$1.46
Diluted earnings per share	$0.71		$0.66		$1.89		$1.43
[1]	See bAcquisition of eSpeed for Trading of U.S. Treasuries,b of Note 4, bAcquisitions,b for further discussion.

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Narrative) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Billions, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Fair value of debt utilizing discounted cash flow analyses	$2.60	$2.80

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Financial investments, at fair value	$169	[1]	$189	[1]
Default fund investments	2,387	[2]	1,867	[2]
Total	2,556		2,056
Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Financial investments, at fair value	169	[1]	189	[1]
Default fund investments	738	[2]	774	[2]
Total	907		963
Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Default fund investments	1,649	[2]	1,093	[2]
Total	$1,649		$1,093
[1]	As of September 30, 2014 and December 31, 2013, Level 1 financial investments, at fair value were primarily comprised of trading securities, mainly Swedish government debt securities. Of these securities, $156 million as of September 30, 2014 and $167 million as of December 31, 2013 are assets utilized to meet regulatory capital requirements, primarily for the clearing operations of Nasdaq Nordic Clearing.
[2]	Default fund and margin deposit investments include cash contributions invested by Nasdaq Nordic Clearing, in accordance with its investment policy, either in highly rated government debt securities or reverse repurchase agreements with highly rated government debt securities as collateral. Of the total balance of $2,513 million recorded in the Condensed Consolidated Balance Sheets as of September 30, 2014, $1,649 million of cash contributions have been invested in reverse repurchase agreements and $738 million of cash contributions have been invested in highly rated government debt securities and time deposits. The remainder of this balance is held in cash. Of the total balance of $1,961 million recorded in the Condensed Consolidated Balance Sheets as of December 31, 2013, $1,093 million of cash contributions were invested in reverse repurchase agreements and $774 million of cash contributions were invested in highly rated government debt securities. The remainder of this balance was held in cash.

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Additional Information) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Financial investments, at fair value	$169	[1]	$189	[1]
Default funds and margin deposits	2,513		1,961
Restricted assets [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Financial investments, at fair value	156		167
Reverse Repurchase Agreements [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Default funds and margin deposits	1,649		1,093
US Government Debt Securities [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Default funds and margin deposits	$738		$774
[1]	As of September 30, 2014 and December 31, 2013, Level 1 financial investments, at fair value were primarily comprised of trading securities, mainly Swedish government debt securities. Of these securities, $156 million as of September 30, 2014 and $167 million as of December 31, 2013 are assets utilized to meet regulatory capital requirements, primarily for the clearing operations of Nasdaq Nordic Clearing.

Clearing_Operations_Narrative_

Clearing Operations (Narrative) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014
	contract				contract	NASDAQ OMX Nordic [Member]	NASDAQ OMX Nordic [Member]	Liability Waterfall [Member]
						contract	contract
Clearing Operations [Line Items]	'		'		'	'	'	'
Financial investments, at fair value	$169,000,000	[1]	$189,000,000	[1]	'	$110,000,000	'	'
Credit facility, borrowing capacity	'		'		'	42,000,000	'	'
Contract value of resale and repurchase agreements	'		'		'	2,600,000,000	5,600,000,000	'
Total number of derivative contracts cleared	'		'		'	3,157,685	3,428,514	'
Power of assessment of the clearing member's contribution to the financial markets and commodities markets default funds	'		'		'	100.00%	'	'
Junior capital, cash deposits and pledged assets	'		'		'	'	'	20,000,000
Senior capital, cash deposits and pledged assets	'		'		'	'	'	14,000,000
Market value of derivative contracts outstanding, prior to netting	1,978,000,000		'		'	'	'	'
Total number of derivative contracts cleared through NASDAQ OMX Nordic Clearing	70,177,153		'		76,444,255	'	'	'
Restricted cash	27,000,000		84,000,000		'	'	'	'
Default Fund Contributions	$378,000,000		'		'	'	'	'
[1]	As of September 30, 2014 and December 31, 2013, Level 1 financial investments, at fair value were primarily comprised of trading securities, mainly Swedish government debt securities. Of these securities, $156 million as of September 30, 2014 and $167 million as of December 31, 2013 are assets utilized to meet regulatory capital requirements, primarily for the clearing operations of Nasdaq Nordic Clearing.

Clearing_Operations_Schedule_o

Clearing Operations (Schedule of Clearing Member Default Fund Contributions And Margin Deposits) (Details) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Clearing Operations [Line Items]	'
Default fund contributions	$378
Margin deposits	8,502
Default fund contributions and margin deposits	8,880
Cash Contributions [Member]	'
Clearing Operations [Line Items]	'
Default fund contributions	296	[1],[2]
Margin deposits	2,217	[1],[2]
Default fund contributions and margin deposits	2,513	[1],[2]
Non-Cash Contributions [Member]	'
Clearing Operations [Line Items]	'
Default fund contributions	82
Margin deposits	6,285
Default fund contributions and margin deposits	$6,367
[1]	As of September 30, 2014, in accordance with its investment policy, Nasdaq Nordic Clearing has invested cash contributions of $1,649 million in reverse repurchase agreements and $738 million in highly rated government debt securities
[2]	Pursuant to clearing member agreements, we pay interest on cash contributions to clearing members.

Clearing_Operations_Schedule_o1

Clearing Operations (Schedule of Clearing Member Default Fund Contributions And Margin Deposits Additional Information) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Clearing Operations [Line Items]	'		'
Investment of cash contributions in highly rated debt securities	$2,387	[1]	$1,867	[1]
NASDAQ OMX Nordic [Member]	'		'
Clearing Operations [Line Items]	'		'
Default fund cash contributions invested in repurchase agreements	1,649		'
Default fund cash contributions invested in highly rated governmant debt securities	$738		'
[1]	Default fund and margin deposit investments include cash contributions invested by Nasdaq Nordic Clearing, in accordance with its investment policy, either in highly rated government debt securities or reverse repurchase agreements with highly rated government debt securities as collateral. Of the total balance of $2,513 million recorded in the Condensed Consolidated Balance Sheets as of September 30, 2014, $1,649 million of cash contributions have been invested in reverse repurchase agreements and $738 million of cash contributions have been invested in highly rated government debt securities and time deposits. The remainder of this balance is held in cash. Of the total balance of $1,961 million recorded in the Condensed Consolidated Balance Sheets as of December 31, 2013, $1,093 million of cash contributions were invested in reverse repurchase agreements and $774 million of cash contributions were invested in highly rated government debt securities. The remainder of this balance was held in cash.

Clearing_Operations_Schedule_o2

Clearing Operations (Schedule of Derivative Contracts Outstanding) (Details) (USD $)	Sep. 30, 2014		Sep. 30, 2013
In Millions, unless otherwise specified	contract		contract
Clearing Operations [Line Items]	'		'
Market value of derivative contracts	$1,978		'
Total Number of Cleared Contracts	70,177,153		76,444,255
Commodity forwards and options [Member]	'		'
Clearing Operations [Line Items]	'		'
Market value of derivative contracts	987	[1],[2],[3]	'
Total Number of Cleared Contracts	1,705,947	[4]	2,217,572	[4]
Fixed-income options and futures [Member]	'		'
Clearing Operations [Line Items]	'		'
Market value of derivative contracts	611	[2],[3]	'
Total Number of Cleared Contracts	14,270,232		21,131,906
Stock options and futures [Member]	'		'
Clearing Operations [Line Items]	'		'
Market value of derivative contracts	161	[2],[3]	'
Total Number of Cleared Contracts	24,426,440		23,200,139
Index options and futures [Member]	'		'
Clearing Operations [Line Items]	'		'
Market value of derivative contracts	$219	[2],[3]	'
Total Number of Cleared Contracts	29,705,046		29,892,938
Frieght and seafood derivatives [Member]	'		'
Clearing Operations [Line Items]	'		'
Total Number of Cleared Contracts	69,488		1,700
[1]	We determined the fair value of our forward contracts using standard valuation models that were based on market-based observable inputs including LIBOR rates and the spot price of the underlying instrument.
[2]	We determined the fair value of our option contracts using standard valuation models that were based on market-based observable inputs including implied volatility, interest rates and the spot price of the underlying instrument.
[3]	We determined the fair value of our futures contracts based upon quoted market prices and average quoted market yields.
[4]	The total volume in cleared power related to commodity contracts was 1,150 Terawatt hours (TWh) for the nine months ended September 30, 2014 and 1,247 TWh for the nine months ended September 30, 2013.

Clearing_Operations_Schedule_o3

Clearing Operations (Schedule of Derivative Contracts Outstanding Additional Information) (Details)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
	TW	TW
Clearing Operations [Abstract]	'	'
Total volume in cleared power, in Terawatt hours (TWh)	1,150	1,247

Commitments_Contingencies_and_1

Commitments, Contingencies and Guarantees (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

eSpeed [Member]

BWise [Member]

Clearinghouse Credit Facilities [Member]

Clearinghouse Credit Facilities [Member]

Escrow Agreement [Member]

Property Lease Guarantee [Member]

Property Lease Guarantee [Member]

Commitments and Contingencies Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Financial guarantees obtained

$27

'

$27

'

$20

'

'

'

'

'

'

'

Credit facilities, total

'

'

'

'

'

'

'

253

312

'

'

'

Line of credit facility, available liquidity

'

'

'

'

'

'

'

211

219

'

'

'

Credit facility, regulatory requirements amount

'

'

'

'

'

'

'

42

93

'

'

'

Margin deposits contributed to Cantor Fitzgerald

31

'

31

'

'

'

'

'

'

'

'

'

Line of credit, outstanding amount

'

'

'

'

11

'

'

0

11

'

'

'

Other guarantees

'

'

'

'

'

'

'

'

'

'

14

17

Contingency, accrual

'

'

'

'

'

'

'

'

'

10

'

'

Percentage of acquired ownership interest

'

'

'

'

'

'

28.00%

'

'

'

'

'

Contingent future issuance of common stock, shares

992,247

[1]

992,247

[1]

330,749

[1]

330,749

[1]

'

992,247

'

'

'

'

'

'

Consolidated Amount of Revenue required to triger annual issuance of NASDAQ OMX common stock

'

'

$25

'

'

$25

'

'

'

'

'

'

[1]

See bAcquisition of eSpeed for Trading of U.S. Treasuries,b of Note 4, bAcquisitions,b for further discussion.

Business_Segments_Narrative_De

Business Segments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
			segment
Segment Reporting Information [Line Items]	'	'	'	'
SEC matter expense	'	'	'	$10
Number of Operating Segments	'	'	4	'
Merger and strategic initiatives	5	'	46	33
Payments Of Debt Extinguishment Costs	'	'	9	'
Restructuring and other charges	'	'	'	9
Voluntary accommodation program	'	'	'	62
Payment Made Under Voluntary Accomodation Program	'	'	'	44
eSpeed And TR Corporate [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Merger and strategic initiatives	'	$8	'	'

Business_Segments_Schedule_of_

Business Segments (Schedule of Operating Segments) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	$818		$805		$2,580		$2,362		'
Cost of revenues	-321		-299		-1,031		-987		'
Revenues less transaction rebates, brokerage, clearance and exchange fees	497		506		1,549		1,375		'
Operating income (loss)	207		202		581		450		'
Assets	12,692		'		12,692		'		12,577
Market Services [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	515		499		1,640		1,559		'
Cost of revenues	-321		-299		-1,031		-987		'
Revenues less transaction rebates, brokerage, clearance and exchange fees	194		200		609		572		'
Operating income (loss)	89		85		271		234		'
Listing Services [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	59		57		177		170		'
Cost of revenues	'		'		'		'		'
Revenues less transaction rebates, brokerage, clearance and exchange fees	59		57		177		170		'
Operating income (loss)	25		22		70		69		'
Information Services [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	114		117		360		329		'
Cost of revenues	'		'		'		'		'
Revenues less transaction rebates, brokerage, clearance and exchange fees	114		117		360		329		'
Operating income (loss)	82		87		264		246		'
Technology Solutions [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	130		132		403		304		'
Cost of revenues	'		'		'		'		'
Revenues less transaction rebates, brokerage, clearance and exchange fees	130		132		403		304		'
Operating income (loss)	17		8		36		18		'
Corporate Items and Eliminations [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Cost of revenues	'		'		'		'		'
Operating income (loss)	($6)	[1]	'	[2]	($60)	[3]	($117)	[4]	'
[1]	Corporate items and eliminations for the three months ended September 30, 2014 primarily include merger and strategic initiatives expense of $5 million primarily related to the acquisition of the TR Corporate businesses.
[2]	Corporate items and eliminations for the three months ended September 30, 2013 primarily include merger and strategic initiatives expense of $8 million primarily related to the acquisitions of eSpeed and the TR Corporate businesses. These amounts were offset by the remeasurement of a contingent purchase price liability related to the BWise acquisition due to changes in the anticipated performance of BWise.
[3]	Corporate items and eliminations for the nine months ended September 30, 2014 primarily include merger and strategic initiatives expense of $46 million primarily related to the acquisition of the TR Corporate businesses and other strategic initiatives and a loss on debt extinguishment of $9 million.
[4]	Corporate items and eliminations for the nine months ended September 30, 2013 primarily include expense related to the one-time program for voluntary accommodations to qualifying members of up to $62 million. This program expanded the pool available to compensate members of The NASDAQ Stock Market for qualified losses arising directly from the system issues experienced with the Facebook IPO that occurred on May 18, 2012. Our liability was reduced to $44 million and payment of valid claims totaling $44 million was made in the fourth quarter of 2013. Corporate items and eliminations also include merger and strategic initiatives expense of $33 million primarily related to our acquisitions of eSpeed and the TR Corporate businesses, expense related to an SEC matter of $10 million, and restructuring charges of $9 million.

Subsequent_Event_Details

Subsequent Event (Details) (USD $)	Sep. 30, 2012	Oct. 31, 2014
In Millions, unless otherwise specified		Subsequent Event [Member]
Subsequent Event [Line Items]	'	'
Stock Repurchase Program Authorized Amount	$300	$500