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v3.19.3.a.u2

Debt (Settled) (Details) - USD ($) $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 16, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Feb. 05, 2019 | Jul. 11, 2017
Debt |  |  |  |  |  |
Total debt |  | $ 9,261 | $ 9,978 |  |  |
Aggregate net loss |  | $ (41) | (3) | $ (55) |  |
2.50% Senior Notes due October 2017 |  |  |  |  |  |
Debt |  |  |  |  |  |
Debt instrument interest rate stated percentage | 2.50% |  |  |  |  |
Aggregate debt repurchase |  |  |  | 271 |  |
Aggregate principal amount repaid | $ 152 |  |  | 62 |  |
6.00% Senior Notes due March 2018 |  |  |  |  |  |
Debt |  |  |  |  |  |
Aggregate debt repurchase |  |  |  | 400 |  |
Aggregate principal amount repaid |  |  |  | 354 |  |
7.375% Senior Notes due April 2018 |  |  |  |  |  |
Debt |  |  |  |  |  |
Aggregate debt repurchase |  |  |  | 128 |  |
Aggregate principal amount repaid |  |  |  | 83 |  |
6.50% Senior Notes due November 2020 |  |  |  |  |  |
Debt |  |  |  |  |  |
Debt instrument interest rate stated percentage |  | 6.50% |  |  |  |
Total debt |  | $ 206 | 288 |  |  |
Aggregate debt repurchase |  | 57 |  | 207 |  |
Aggregate principal amount repaid |  | $ 23 |  | 15 |  |
6.375% Senior Notes due December 2021 |  |  |  |  |  |
Debt |  |  |  |  |  |
Debt instrument interest rate stated percentage |  | 6.375% |  |  |  |
Total debt |  | $ 221 | 327 |  |  |
Aggregate debt repurchase |  | 63 |  | 213 |  |
Aggregate principal amount repaid |  | $ 43 |  | 10 |  |
3.80% Senior Notes due October 2022 |  |  |  |  |  |
Debt |  |  |  |  |  |
Debt instrument interest rate stated percentage |  | 3.80% |  |  |  |
Total debt |  | $ 189 | 408 |  |  |
Aggregate debt repurchase |  | 190 |  |  |  |
Aggregate principal amount repaid |  | $ 32 | 95 | 33 |  |
9.00% Senior Notes due July 2023 |  |  |  |  |  |
Debt |  |  |  |  |  |
Debt instrument interest rate stated percentage |  | 9.00% |  |  |  |
Total debt |  | $ 701 | 1,221 |  |  |
Aggregate debt repurchase |  | 200 |  |  |  |
Aggregate principal amount repaid |  | 336 |  |  |  |
Debt Repurchases |  |  |  |  |  |
Debt |  |  |  |  |  |
Aggregate principal amount repaid |  | 434 | 95 | 557 |  |
Aggregate cash payment |  | 449 | 95 | 564 |  |
Aggregate net loss |  | (23) |  | (7) |  |
Tendered Notes |  |  |  |  |  |
Debt |  |  |  |  |  |
Tender Offer Principal Amount |  |  |  |  | $ 700 | $ 1,500
Aggregate debt repurchase |  | 510 |  | 1,219 |  |
Aggregate cash payment |  | 522 |  | 1,269 |  |
Aggregate net loss |  | (18) |  | (48) |  |
Aggregate of unspecified debt |  |  |  |  |  |
Debt |  |  |  |  |  |
Aggregate principal amount repaid |  | $ 354 | 257 | $ 299 |  |
Songa |  |  |  |  |  |
Debt |  |  |  |  |  |
Aggregate cash payment |  |  | $ 1,650 |  |  |

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