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Long-Term Debt Long Term Debt (Schedule of Equity Units) (Details) - USD ($) |  |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 15, 2016 | Jul. 01, 2016 | Apr. 01, 2016 | Jul. 01, 2014 | Jul. 31, 2016 | Apr. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2016
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Purchase Contract Liability | [1] |  |  |  |  |  |  |  | $ 212,000,000 | $ 115,000,000 |
Total payments |  |  |  |  |  |  |  |  | $ 94,000,000 | $ 101,000,000 |
Capital Unit, Class A |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Units Issued |  | 28,000,000 | [2] |  |  | 20,000,000 |  |  |  |  |
Total Net Proceeds |  | $ 1,374,800,000 | [2] |  |  | $ 982,000,000 |  |  |  |  |
Stock Purchase Contract Annual Rate (percentage) |  | 4.75% | [2] |  |  | 4.875% |  |  |  |  |
Stock Purchase Contract Liability | [1] | $ 190,600,000 | [2] |  |  | $ 142,800,000 |  |  |  |  |
Capital Unit, Class A | Remarketable Subordinated Notes |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Units Issued |  |  |  | 8,500,000.0 | 8,500,000.0 |  | 8,500,000.0 | 8,500,000.0 |  |  |
Total Long-term Debt |  | $ 1,400,000,000.0 | [2] |  |  | $ 1,000,000,000 |  |  |  |  | $ 550,000,000
RSN Annual Interest Rate |  | 2.00% | [2],[3] |  |  | 1.50% |  |  |  |  | 1.07%
Capital Unit, Class A | Remarketable Subordinated Notes, 2016 Series A-1, due August 15, 2021 |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Long-term Debt |  | $ 700,000,000 |  |  |  |  |  |  |  |  |
Capital Unit, Class A | Remarketable Subordinated Notes, 2016 Series A-2, due August 15, 2024 |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Long-term Debt |  | $ 700,000,000 |  |  |  |  |  |  |  |  |
[1] | Payments of $94 million and $101 million were made in 2016 and 2015, respectively, including payments for the remarketed 2013 Series A and B notes. The stock purchase contract liability was $212 million and $115 million at December 31, 2016 and 2015, respectively.
[2] | The maturity dates of the $700 million Series A-1 RSNs and $700 million Series A-2 RSNs are August 15, 2021 and August 15, 2024, respectively.
[3] | Annual interest rate applies to each of the Series A-1 RSNs and Series A-2 RSNs.

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