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Nasdaq Stockholders' Equity (Schedule of Dividends Declared) (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2016 | Oct. 25, 2016 | Sep. 30, 2016 | Jul. 26, 2016 | Jun. 24, 2016 | Mar. 28, 2016 | Jan. 27, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |
Dividend per common share (in dollars per share) |  |  |  |  |  |  |  | $ 1.21 | $ 0.90 | $ 0.58
Total Amount Paid |  |  |  |  |  |  |  | $ 200 | $ 149 | $ 98
January 27, 2016 |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |
Dividend per common share (in dollars per share) |  |  |  |  |  |  | $ 0.25 |  |  |
Total Amount Paid |  |  |  |  |  | $ 41 |  |  |  |
March 28, 2016 |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |
Dividend per common share (in dollars per share) |  |  |  |  |  | $ 0.32 |  |  |  |
Total Amount Paid |  |  |  |  | $ 53 |  |  |  |  |
July 26, 2016 |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |
Dividend per common share (in dollars per share) |  |  |  | $ 0.32 |  |  |  |  |  |
Total Amount Paid |  |  | $ 53 |  |  |  |  |  |  |
October 25, 2016 |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |
Dividend per common share (in dollars per share) |  | $ 0.32 |  |  |  |  |  |  |  |
Total Amount Paid | $ 53 |  |  |  |  |  |  |  |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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