v2.4.0.8

Debt (Narrative) (Details)	0 Months Ended	6 Months Ended								0 Months Ended	6 Months Ended	0 Months Ended	6 Months Ended	0 Months Ended												0 Months Ended								6 Months Ended								0 Months Ended
	Apr. 03, 2014 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Dec. 31, 2013 USD ($)	Nov. 30, 2011 Senior Unsecured Credit Facilities [Member] USD ($)	Nov. 30, 2011 Senior Unsecured Term Loan Facility [Member] USD ($)	Nov. 30, 2011 Unsecured Revolving Credit Facility [Member] USD ($)	Apr. 03, 2014 364 Day Unsecured Revolving Credit Facility USD ($)	Jul. 31, 2013 364 Day Unsecured Revolving Credit Facility USD ($)	Apr. 03, 2014 Minimum [Member]	Jun. 30, 2014 Minimum [Member]	Apr. 03, 2014 Maximum [Member]	Jun. 30, 2014 Maximum [Member]	Apr. 03, 2014 Federal Fund Rate [Member]	Apr. 03, 2014 London Interbank Offered Rate (LIBOR) [Member]	Apr. 03, 2014 London Interbank Offered Rate (LIBOR) [Member] Minimum [Member]	Apr. 03, 2014 London Interbank Offered Rate (LIBOR) [Member] Maximum [Member]	Apr. 03, 2014 Base Rate [Member] Minimum [Member]	Apr. 03, 2014 Base Rate [Member] Maximum [Member]	Nov. 13, 2013 NYSE Euronext [Member] USD ($)	Apr. 03, 2014 ICE Clear Europe USD ($)	Apr. 03, 2014 ICE Clear Credit USD ($)	Apr. 03, 2014 Ice Clear U.S. [Member] USD ($)	Apr. 03, 2014 ICE Clear Canada USD ($)	Jun. 30, 2014 NYSE Euronext USD Notes (2.0% senior unsecured notes due October 5, 2017) USD ($)	Apr. 02, 2014 Commercial Paper [Member] USD ($)	Apr. 03, 2014 Commercial Paper [Member]	Jun. 30, 2014 2018 Senior Notes (2.5% senior unsecured notes due October 15, 2018) USD ($)	Dec. 31, 2013 2018 Senior Notes (2.5% senior unsecured notes due October 15, 2018) USD ($)	Oct. 31, 2013 2018 Senior Notes (2.5% senior unsecured notes due October 15, 2018) USD ($)	Jun. 30, 2014 2023 Senior Notes (4.0% senior unsecured notes due October 15, 2023) USD ($)	Dec. 31, 2013 2023 Senior Notes (4.0% senior unsecured notes due October 15, 2023) USD ($)	Oct. 31, 2013 2023 Senior Notes (4.0% senior unsecured notes due October 15, 2023) USD ($)	Jun. 30, 2014 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) USD ($)	Jun. 30, 2014 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) EUR (€)	Dec. 31, 2013 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) USD ($)	Nov. 13, 2013 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) USD ($)	Nov. 13, 2013 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) EUR (€)	Jun. 30, 2014 NYSE Euronext USD Notes (2.0% senior unsecured notes due October 5, 2017) USD ($)	Dec. 31, 2013 NYSE Euronext USD Notes (2.0% senior unsecured notes due October 5, 2017) USD ($)	Nov. 13, 2013 NYSE Euronext USD Notes (2.0% senior unsecured notes due October 5, 2017) USD ($)	Jun. 24, 2014 NYSE Euronext [Member] USD ($)	Jun. 24, 2014 NYSE Euronext [Member] EUR (€)	Jun. 24, 2014 Term Deposits [Member] NYSE Euronext [Member] USD ($)	Jun. 24, 2014 Term Deposits [Member] NYSE Euronext [Member] EUR (€)	Jun. 24, 2014 Cash Distribution [Member] NYSE Euronext [Member] USD ($)
Line of Credit Facility [Line Items]
Debt Instrument, Periodic Payment, Interest																																		$ 67,000,000	€ 49,000,000
Line of Credit Facility, Maximum Borrowing Capacity	3,000,000,000				2,600,000,000	500,000,000	2,100,000,000		600,000,000
Line of Credit Facility, Additional Borrowing Capacity	1,000,000,000
Debt Issuance Cost	11,000,000
Debt Instrument, Basis Spread on Variable Rate														0.50%	1.00%	0.875%	1.50%	0.00%	0.50%
Line of Credit Facility, Amount Outstanding								0
Debt Instrument, Interest Rate, Stated Percentage																											2.0275%			2.50%			4.00%				5.375%	5.375%			2.00%
Line of Credit Facility, Funds Reserved For Commercial Paper Program	368,000,000
Credit Facility Funds Reserved For Clearing Operations	303,000,000																				150,000,000	100,000,000	50,000,000	3,000,000
Line of Credit Facility, Unreserved Amount	2,300,000,000
Line of Credit Facility, Commitment Fee Percentage	0.125%									0.08%		0.20%
Senior Notes																									2,170,000,000
Extinguishment of Debt, Amount																										367,000,000
Cash paid for interest		101,000,000	13,000,000
Debt Instrument, Face Amount																														600,000,000			800,000,000				1,300,000,000	920,000,000			850,000,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate																														2.50%			4.00%								2.00%
Payments to Acquire Businesses, Gross																				11,100,000,000
Senior Notes																												600,000,000	599,000,000		794,000,000	794,000,000		854,000,000		854,000,000			0	1,353,000,000
Fair value of senior notes																									2,190,000,000
Commercial Paper		368,000,000		1,080,000,000
Commercial Paper Maturities											1 day		85 days
Commercial Paper, Weighted Average Interest Rate		0.29%
Commercial Paper Weighted Average Maturity Period		35 days
Proceeds from sales of available-for-sale investments		28,000,000	0																																							1,900,000,000	1,400,000,000	1,300,000,000	969,000,000	220,000,000
Unsecured Debt, Current																																		$ 1,315,000,000	€ 920,000,000	$ 0

X

- Definition

Commercial Paper Maturities

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Commercial Paper, Weighted Average Interest Rate

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Credit Facility Funds Reserved For Clearing Operations

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Line of Credit Facility, Additional Borrowing Capacity

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Line of Credit Facility, Funds Reserved For Commercial Paper Program

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Line of Credit Facility, Unreserved Amount

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- Definition

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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-Section 03

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the required periodic payments applied to interest.

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Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

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Gross amount of debt extinguished.

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The amount of cash paid for interest during the period.

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Amount borrowed under the credit facility as of the balance sheet date.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Carrying value as of the balance sheet date of the portion of long-term, uncollateralized debt obligations due within one year or the normal operating cycle, if longer.

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Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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