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v3.21.2

Related party transactions - Related Party Payable Balances (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020 | Jun. 30, 2020
--- | --- | --- | ---
Related Party Transaction [Line Items] |  |  |
Total related party liabilities | $ 635 | $ 433 |
Amounts due to related parties - current | 0 | 7 |
Long-term debt due to related parties | 0 | 426 |
Liabilities subject to compromise | 6,406 |  | $ 0
Related party loans payable |  |  |
Related Party Transaction [Line Items] |  |  |
Total related party liabilities | 635 | 426 |
Long-term debt due to related parties | 0 | 426 |
Liabilities subject to compromise | 635 | 0 |
Trading balances |  |  |
Related Party Transaction [Line Items] |  |  |
Amounts due to related parties - current | $ 0 | $ 7 |

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