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Debt (Narrative) (Details)
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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 | ||||||||||||||||||||||||||||||||||||
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Apr. 03, 2014
USD ($)
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Jun. 30, 2014
USD ($)
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Jun. 30, 2013
USD ($)
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Dec. 31, 2013
USD ($)
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Nov. 30, 2011
Senior Unsecured Credit Facilities [Member]
USD ($)
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Nov. 30, 2011
Senior Unsecured Term Loan Facility [Member]
USD ($)
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Nov. 30, 2011
Unsecured Revolving Credit Facility [Member]
USD ($)
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Apr. 03, 2014
364 Day Unsecured Revolving Credit Facility
USD ($)
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Jul. 31, 2013
364 Day Unsecured Revolving Credit Facility
USD ($)
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Apr. 03, 2014
Minimum [Member]
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Jun. 30, 2014
Minimum [Member]
|
Apr. 03, 2014
Maximum [Member]
|
Jun. 30, 2014
Maximum [Member]
|
Apr. 03, 2014
Federal Fund Rate [Member]
|
Apr. 03, 2014
London Interbank Offered Rate (LIBOR) [Member]
|
Apr. 03, 2014
London Interbank Offered Rate (LIBOR) [Member]
Minimum [Member]
|
Apr. 03, 2014
London Interbank Offered Rate (LIBOR) [Member]
Maximum [Member]
|
Apr. 03, 2014
Base Rate [Member]
Minimum [Member]
|
Apr. 03, 2014
Base Rate [Member]
Maximum [Member]
|
Nov. 13, 2013
NYSE Euronext [Member]
USD ($)
|
Apr. 03, 2014
ICE Clear Europe
USD ($)
|
Apr. 03, 2014
ICE Clear Credit
USD ($)
|
Apr. 03, 2014
Ice Clear U.S. [Member]
USD ($)
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Apr. 03, 2014
ICE Clear Canada
USD ($)
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Jun. 30, 2014
NYSE Euronext USD Notes (2.0% senior unsecured notes due October 5, 2017)
USD ($)
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Apr. 02, 2014
Commercial Paper [Member]
USD ($)
|
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 ($)
|
Oct. 31, 2013
2023 Senior Notes (4.0% senior unsecured notes due October 15, 2023)
USD ($)
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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 | |||||||||||||||||||||||||||||||||||||||||||