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Accounting for Derivative Instruments and Hedging Activities - Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid |  |
Gross Amounts of Recognized Assets / Liabilities | $ 648 | $ 3,553
Derivative Instruments | 0 | 0
Cash Collateral (Held) / Posted | 71 | (1,639)
Net Amount | 719 | 1,914
Interest rate contracts |  |
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid |  |
Derivative Assets | 12 |
Derivative Instruments | (8) |
Cash Collateral (Held)/Posted | 0 |
Net Amount | 4 |
Derivative liabilities | (8) |
Derivative Instruments | 8 |
Cash Collateral (Held)/Posted | 0 |
Net Amount | 0 |
Gross Amounts of Recognized Assets / Liabilities | 4 |
Derivative Instruments | 0 |
Cash Collateral (Held) / Posted | 0 |
Net Amount | 4 |
Foreign exchange contract |  |
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid |  |
Derivative Assets | 5 | 18
Derivative Instruments | (5) | (2)
Cash Collateral (Held)/Posted | 0 | 0
Net Amount | 0 | 16
Derivative liabilities | (9) | (2)
Derivative Instruments | 5 | 2
Cash Collateral (Held)/Posted | 0 | 0
Net Amount | (4) | 0
Gross Amounts of Recognized Assets / Liabilities | (4) | 16
Derivative Instruments | 0 | 0
Cash Collateral (Held) / Posted | 0 | 0
Net Amount | (4) | 16
Commodity contracts |  |
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid |  |
Derivative Assets | 6,138 | 11,976
Derivative Instruments | (4,926) | (7,897)
Cash Collateral (Held)/Posted | (74) | (1,659)
Net Amount | 1,138 | 2,420
Derivative liabilities | (5,356) | (8,439)
Derivative Instruments | 4,926 | 7,897
Cash Collateral (Held)/Posted | 145 | 20
Net Amount | (285) | (522)
Gross Amounts of Recognized Assets / Liabilities | 782 | 3,537
Derivative Instruments | 0 | 0
Cash Collateral (Held) / Posted | 71 | (1,639)
Net Amount | 853 | $ 1,898
Consumer Financing Program |  |
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid |  |
Derivative liabilities | (134) |
Derivative Instruments | 0 |
Cash Collateral (Held)/Posted | 0 |
Net Amount | $ (134) |

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