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Fair Value (Quantitative Information) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Fair Value Inputs Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | $ (184) | $ (297) | $ (184) | $ (297) | $ (175) | $ (220) | $ (290) | $ (31)
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | (3) | (10) | 20 | (12) |  |  |  |
Fair Value Measurements With Unobservable Inputs Reconciliation Recurring Basis Regulatory Assets Liabilities | (21) |  | (21) |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | (4) | (6) | (12) | (18) |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 |  | 4 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) | (3) | (17) | 3 | (27) |  |  |  |
Other comprehensive income - Derivative activity [Member] |  |  |  |  |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | (2) | 10 | 37 | (18) |  |  |  |
Interest Rate Contract [Member] |  |  |  |  |  |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | (4) | 0 | (4) | 0 | (2) | (4) | (1) | 0
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | 0 | 0 | 0 | 0 |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | 0 | 0 | 0 | 0 |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 |  | 4 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) | 0 | 0 | 0 | 0 |  |  |  |
Interest Rate Contract [Member] | Other comprehensive income - Derivative activity [Member] |  |  |  |  |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | (2) | 5 | 0 | 2 |  |  |  |
Foreign Exchange Contract [Member] |  |  |  |  |  |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 56 | 46 | 56 | 46 | 60 | 59 | 63 | 64
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | 5 | (6) | 19 | 0 |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | (10) | (9) | (28) | (18) |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 |  | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) | (3) | (13) | (3) | (14) |  |  |  |
Foreign Exchange Contract [Member] | Other comprehensive income - Derivative activity [Member] |  |  |  |  |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | 1 | (2) | 6 | 0 |  |  |  |
Commodity Contract [Member] |  |  |  |  |  |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | (73) | (76) | (73) | (76) | $ (71) | $ (110) | $ (78) | $ (47)
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | 0 | (3) | 4 | (3) |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | (1) | (2) | (3) | (5) |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 |  | 0 |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) | 0 | (3) | 6 | (4) |  |  |  |
Commodity Contract [Member] | Other comprehensive income - Derivative activity [Member] |  |  |  |  |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | $ (1) | $ 7 | $ 31 | $ (20) |  |  |  |
Measurement Input, Entity Credit Risk [Member] | Interest Rate Contract [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  | 0.80% |  |  |  |  |
Measurement Input, Entity Credit Risk [Member] | Interest Rate Contract [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  | 3.20% |  |  |  |  |
Measurement Input, Entity Credit Risk [Member] | Interest Rate Contract [Member] | Weighted Average [Member] |  |  |  |  |  |  |  |
Fair Value Inputs Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  | 2.30% |  |  |  |  |

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