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v3.19.3.a.u2

Subsequent Events (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 17, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Subsequent events |  |  |  |
Proceeds from issuance of debt |  | $ 1,056 | $ 2,054 | $ 1,144
Aggregate net loss |  | $ (41) | $ (3) | $ (55)
9.00% Senior Notes due July 2023 |  |  |  |
Subsequent events |  |  |  |
Debt instrument interest rate stated percentage |  | 9.00% |  |
Subsequent Event | 8.00% Senior Unsecured Notes due February 2027 |  |  |  |
Subsequent events |  |  |  |
Debt instrument face value | $ 750 |  |  |
Debt instrument interest rate stated percentage | 8.00% |  |  |
Proceeds from issuance of debt | $ 743 |  |  |
Redemption price of debt instrument (as a percent) | 100.00% |  |  |
Subsequent Event | 9.00% Senior Notes due July 2023 |  |  |  |
Subsequent events |  |  |  |
Debt instrument interest rate stated percentage | 9.00% |  |  |
Aggregate cash payment | $ 767 |  |  |
Aggregate net loss | $ (66) |  |  |

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