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Fresh Start Accounting - Reorganization Items, Net (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 09, 2021 | Dec. 15, 2020 | Feb. 09, 2021 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2020
Reorganization, Chapter 11 [Line Items] |  |  |  |  |  |
Loss on divested assets |  | $ (128) |  |  |  |
Total reorganization items, net |  |  | $ 5,569 | $ 0 | $ 0 | $ (796)
Reorganization Adjustments |  |  |  |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |  |  |  |
Gain on settlement of liabilities subject to compromise | $ 6,443 |  | 6,443 |  |  | 12
Accrual for allowed claims |  |  | (1,002) |  |  | (879)
Write off of unamortized debt premiums (discounts) |  |  | 0 |  |  | 518
Write off of unamortized debt issuance costs |  |  | 0 |  |  | (61)
Gain on fresh start adjustments |  |  | 201 |  |  | 0
Gain from release of commitment liabilities |  |  | 55 |  |  | 0
Debt and equity financing fees |  |  | 0 |  |  | (145)
Loss on divested assets |  |  | 0 |  |  | (128)
Legal and professional fees |  |  | (60) |  |  | (113)
Success fees for professional service providers |  |  | (38) |  |  | 0
Surrender of other receivable | 18 |  | (18) |  |  | 0
FLLO alternative transaction fee |  |  | (12) |  |  | 0
Total reorganization items, net | $ (6,370) |  | $ 5,569 |  |  | $ (796)

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