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Debt Second Lien Notes due 2028 (Details) - Secured Debt - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2020 | Mar. 31, 2020 | Jun. 30, 2020 | Feb. 01, 2020 | Jan. 28, 2020 | Apr. 01, 2019 | Feb. 01, 2019
Second Lien Notes Due 2028 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  | $ 1,300 |  |
Interest rate |  |  | 6.25% |  | 6.25% |  |
Redemption price, percent |  | 101.00% |  |  |  |  |
Second Lien Notes Due 2028 | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Redemption price, percent of principal | 100.00% |  |  |  |  |  |
Redemption price, percent | 40.00% |  |  |  |  |  |
Redemption price percentage if 50 of principal remains | 106.25% |  |  |  |  |  |
Redemption price percent of principal amount remaining | 50.00% |  |  |  |  |  |
Second Lien Notes Due 2028 | Debt Instrument, Redemption, Period Two |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Redemption price, percent | 103.125% |  |  |  |  |  |
Second Lien Notes Due 2028 | Debt Instrument, Redemption, Period Three |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Redemption price, percent | 101.563% |  |  |  |  |  |
Second Lien Notes Due 2028 | Debt Instrument, Redemption, Period Four |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Redemption price, percent | 100.00% |  |  |  |  |  |
Prime Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate |  |  | 9.25% |  |  |  |
Repurchased face amount |  |  |  | $ 1,200 |  | $ 1,000 | $ 300

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