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Nasdaq Omx Stockholders' Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | 9 Months Ended | 1 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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Sep. 30, 2013
Series A Preferred Stock [Member]
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Dec. 31, 2012
Series A Preferred Stock [Member]
|
Sep. 30, 2013
Other Repurchases of Common Stock [Member]
|
Oct. 31, 2013
Dividend Declared [Member]
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| Stockholders Equity [Line Items] | |||||||||
| Common stock, shares authorized | 300,000,000 | 300,000,000 | 300,000,000 | ||||||
| Common stock, shares issued | 213,426,908 | 213,426,908 | 213,426,908 | ||||||
| Common stock, shares outstanding | 167,405,199 | 167,405,199 | 165,605,838 | ||||||
| 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 | 46,021,709 | 46,021,709 | 47,821,070 | ||||||
| Share repurchase program, authorized amount | $ 300 | ||||||||
| Treasury shares acquired | 321,000 | 121,425 | |||||||
| Average price of repurchased stock | $ 31.12 | ||||||||
| Aggregate purchase price | 10 | ||||||||
| Remaining authorized share repurchase amounts under repurchase program | 215 | ||||||||
| Cash paid for repurchase of common stock | $ 10 | $ 225 | |||||||
| 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 | 1,600,000 | 1,600,000 | 1,600,000 | 1,600,000 | 1,600,000 | ||||
| Preferred stock, series A convertible preferred stock: shares outstanding | 0 | 0 | 0 | 0 | 0 | ||||
| Cash dividend per share | $ 0.13 | $ 0.13 | $ 0.39 | $ 0.26 | $ 0.13 | ||||
| Dividend declared, date payable | Dec. 27, 2013 | ||||||||
| Dividend declared, record date | Dec. 13, 2013 | ||||||||