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Fair Value of Financial Instruments - Recurring Fair Value (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Assets | $ 44 |  |  |  | $ 44 |  | $ 6
Derivative Liabilities | 355 |  |  |  | 355 |  | 242
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |  |  |  |
Change in unrealized losses included in earnings for derivatives and other financial instruments held as of June 30, 2022 | 6 | $ 14 | $ 0 | $ 11 |  |  |
Interest rate contracts |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Assets | 44 |  |  |  | 44 |  | 6
Derivative Liabilities | 2 |  |  |  | 2 |  | 63
Commodity contracts |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Liabilities | 353 |  |  |  | 353 |  | 179
Fair Value, Recurring |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (280) | (154) | (39) | (15) | (154) | $ (15) |
Total losses for the period included in earnings | (74) |  | (33) |  | (184) | (57) |
Additions due to loss of NPNS exception | 0 |  | 0 |  | (22) | 0 |
Purchases | 0 |  | (9) |  | 0 | (9) |
Settlements | 22 |  | 2 |  | 28 | 2 |
Ending balance | (332) | $ (280) | (79) | $ (39) | (332) | (79) |
Change in unrealized losses included in earnings for derivatives and other financial instruments held as of June 30, 2022 | (74) |  |  |  | (184) |  |
Fair Value, Recurring | Level 2 |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Assets | 44 |  |  |  | 44 |  | 6
Derivative Liabilities | 2 |  |  |  | 2 |  | 63
Fair Value, Recurring | Level 2 | Interest rate contracts |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Assets | 44 |  |  |  | 44 |  | 6
Derivative Liabilities | 2 |  |  |  | 2 |  | 63
Fair Value, Recurring | Level 2 | Other Financial Instruments |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Assets | 0 |  |  |  | 0 |  | 0
Fair Value, Recurring | Level 2 | Commodity contracts |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Liabilities | 0 |  |  |  | 0 |  | 0
Fair Value, Recurring | Level 3 |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Assets | 21 |  |  |  | 21 |  | 25
Derivative Liabilities | 353 |  |  |  | 353 |  | 179
Fair Value, Recurring | Level 3 | Interest rate contracts |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Assets | 0 |  |  |  | 0 |  | 0
Derivative Liabilities | 0 |  |  |  | 0 |  | 0
Fair Value, Recurring | Level 3 | Other Financial Instruments |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Assets | 21 |  |  |  | 21 |  | 25
Fair Value, Recurring | Level 3 | Commodity contracts |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative Liabilities | $ 353 |  |  |  | $ 353 |  | $ 179

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