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Fair Value Measurements - Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | $ 772 | $ 2,418 | $ 1,156
Liabilities: | (453) | (515) | (202)
Commodity contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 18 | 31 | 10
Liabilities: | (35) | (26) | (7)
Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Non-qualified supplemental postretirement grantor trust investments | 46 | 43 | 52
Recurring | Commodity contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 674 | 2,233 | 1,122
Liabilities: | (449) | (513) | (178)
Recurring | Foreign currency contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 35 | 119 | 29
Liabilities: | (4) | (2) | (7)
Recurring | Interest rate contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 63 | 66 | 5
Liabilities: |  |  | (17)
Recurring | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Non-qualified supplemental postretirement grantor trust investments | 46 | 43 | 52
Recurring | Level 1 | Commodity contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 345 | 938 | 411
Liabilities: | (297) | (377) | (160)
Recurring | Level 1 | Foreign currency contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 0 | 0 | 0
Liabilities: | 0 | 0 | 0
Recurring | Level 1 | Interest rate contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 0 | 0 | 0
Liabilities: |  |  | 0
Recurring | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Non-qualified supplemental postretirement grantor trust investments | 0 | 0 | 0
Recurring | Level 2 | Commodity contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 329 | 1,268 | 711
Liabilities: | (152) | (136) | (18)
Recurring | Level 2 | Foreign currency contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 35 | 119 | 29
Liabilities: | (4) | (2) | (7)
Recurring | Level 2 | Interest rate contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 63 | 66 | 5
Liabilities: |  |  | (17)
Recurring | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Non-qualified supplemental postretirement grantor trust investments | 0 | 0 | 0
Recurring | Level 3 | Commodity contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 0 | 27 | 0
Liabilities: | 0 | 0 | 0
Recurring | Level 3 | Foreign currency contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | 0 | 0 | 0
Liabilities: | 0 | 0 | 0
Recurring | Level 3 | Interest rate contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |
Assets: | $ 0 | $ 0 | 0
Liabilities: |  |  | $ 0

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