Commercial Paper Maturities

No definition available.

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- Definition

Commercial Paper, Weighted Average Interest Rate

+ References

No definition available.

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- Definition

Commercial Paper Weighted Average Maturity Period

+ References

No definition available.

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- Definition

Credit Facility Funds Reserved For Clearing Operations

+ References

No definition available.

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- Definition

Debt Instrument Fair Value over Face Amount

+ References

No definition available.

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- Definition

Line of Credit Facility, Additional Borrowing Capacity

+ References

No definition available.

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- Definition

Line of Credit Facility, Funds Reserved For Commercial Paper Program

+ References

No definition available.

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- Definition

Line of Credit Facility, Unreserved Amount

+ References

No definition available.

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- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

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-Subparagraph (b)

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-Topic 225

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-Section S99

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-Subparagraph (SX 210.5-03.8)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 5

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

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-Subparagraph (SX 210.5-02.19(a)(3))

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-Topic 942

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Subparagraph 2

-Article 9

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- Definition

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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-Topic 835

-SubTopic 30

-Section 55

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

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- Definition

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

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-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Amount of the required periodic payments applied to interest.

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-Topic 210

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- Definition

The amount of cash paid for interest during the period.

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-Topic 230

-SubTopic 10

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-Subparagraph (e)

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- Definition

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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 210

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-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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-Name Regulation S-X (SX)

-Number 210

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- Definition

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.

+ References

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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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-Topic 230

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-Section 45

-Paragraph 12

-Subparagraph (a),(b)

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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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-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

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-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20

-Article 5

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- Definition

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.

+ References

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Debt (Narrative) (Details)	3 Months Ended				3 Months Ended													3 Months Ended							0 Months Ended
Debt (Narrative) (Details)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2014 USD ($)	Apr. 03, 2014 USD ($)	Mar. 31, 2015 Minimum [Member]	Mar. 31, 2015 Maximum [Member]	Mar. 31, 2015 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) USD ($)	Mar. 31, 2014 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) USD ($)	Nov. 13, 2013 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) USD ($)	Mar. 31, 2015 NYSE Euronext USD Notes (2.0% senior unsecured notes due October 5, 2017) USD ($)	Nov. 13, 2013 NYSE Euronext USD Notes (2.0% senior unsecured notes due October 5, 2017) USD ($)	Mar. 31, 2015 2018 Senior Notes (2.5% senior unsecured notes due October 15, 2018) USD ($)	Dec. 31, 2014 2018 Senior Notes (2.5% senior unsecured notes due October 15, 2018) USD ($)	Oct. 31, 2013 2018 Senior Notes (2.5% senior unsecured notes due October 15, 2018) USD ($)	Mar. 31, 2015 2023 Senior Notes (4.0% senior unsecured notes due October 15, 2023) USD ($)	Dec. 31, 2014 2023 Senior Notes (4.0% senior unsecured notes due October 15, 2023) USD ($)	Oct. 31, 2013 2023 Senior Notes (4.0% senior unsecured notes due October 15, 2023) USD ($)	Mar. 31, 2015 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) USD ($)	Mar. 31, 2015 NYSE Euronext EUR Notes (5.375% senior unsecured notes due June 30, 2015) EUR (€)	Dec. 31, 2014 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 (€)	Mar. 31, 2015 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 (€)
Line of Credit Facility [Line Items]
Debt Instrument, Periodic Payment, Interest																		$ 53,000,000	€ 49,000,000
Line of Credit Facility, Maximum Borrowing Capacity				3,000,000,000
Line of Credit Facility, Additional Borrowing Capacity				1,000,000,000
Debt Instrument, Interest Rate, Stated Percentage														2.50%			4.00%				5.375%	5.375%		2.00%
Line of Credit Facility, Funds Reserved For Commercial Paper Program				940,000,000
Credit Facility Funds Reserved For Clearing Operations				303,000,000
Line of Credit Facility, Unreserved Amount				1,800,000,000
Senior Notes										1,860,000,000
Cash paid for interest	1,000,000us-gaap_InterestPaid	5,000,000us-gaap_InterestPaid
Debt Instrument, Face Amount														600,000,000			800,000,000	995,000,000			1,000,000,000	920,000,000		850,000,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate														2.50%			4.00%							2.00%
Senior Notes												600,000,000	600,000,000		794,000,000	794,000,000							853,000,000
Fair value of senior notes									1,300,000,000	1,870,000,000	854,000,000
Debt Instrument Fair Value over Face Amount									89,000,000		4,000,000
Commercial Paper	940,000,000us-gaap_CommercialPaper		905,000,000us-gaap_CommercialPaper
Commercial Paper Maturities					1 day	90 days
Commercial Paper, Weighted Average Interest Rate	0.23%
Commercial Paper Weighted Average Maturity Period	23 days
Proceeds from sales of available-for-sale investments	0	10,000,000																							1,900,000,000	1,400,000,000	1,000,000,000	969,000,000
Unsecured Debt, Current																		1,006,000,000	920,000,000	1,137,000,000
Amortization of Debt Discount (Premium)							$ 0	$ 0