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Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract] |
Estimated Future Benefit Payments | We expect to make the following benefit payments to participants in the next ten fiscal years under the Nasdaq Benefit Plans:
| Pension |  | SERP |  | Post-retirement |  | Total
Fiscal Year Ended: | (in millions)
2017 | $ | 4 |  |  | $ | 7 |  |  | $ | 1 |  |  | $ | 12 |
2018 | 4 |  |  | 3 |  |  | — |  |  | 7 |
2019 | 5 |  |  | 4 |  |  | — |  |  | 9 |
2020 | 5 |  |  | 5 |  |  | — |  |  | 10 |
2021 | 5 |  |  | 1 |  |  | — |  |  | 6 |
2022 through 2026 | 26 |  |  | 8 |  |  | 1 |  |  | 35 |
| $ | 49 |  |  | $ | 28 |  |  | $ | 2 |  |  | $ | 79 |

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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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