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Capital Accounts, Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |
Accumulated Other Comprehensive Income (Loss), Beginning Balance | $ 307 | $ 365
Other comprehensive income (loss) for period, before reclassifications | (160) | (94)
Reclassification of losses (gains) to net income during period | (4) | (30)
Total other comprehensive income (loss) for period | (164) | (124)
Accumulated Other Comprehensive Income (Loss), Ending balance | 143 | 241
Interest expense | 331 | 314
Revenue | (14,760) | (12,444)
Operating costs and expenses | 12,974 | 10,757
Total | (1,483) | (1,422)
Cash Flow Hedges [Member] | Interest Rate Derivatives [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |
Accumulated Other Comprehensive Income (Loss), Beginning Balance | 151 | 192
Other comprehensive income (loss) for period, before reclassifications | 2 | (5)
Reclassification of losses (gains) to net income during period | (2) | 2
Total other comprehensive income (loss) for period | 0 | (3)
Accumulated Other Comprehensive Income (Loss), Ending balance | 151 | 189
Cash Flow Hedges [Member] | Commodity Derivatives [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |
Accumulated Other Comprehensive Income (Loss), Beginning Balance | 154 | 171
Other comprehensive income (loss) for period, before reclassifications | (162) | (89)
Reclassification of losses (gains) to net income during period | (2) | (32)
Total other comprehensive income (loss) for period | (164) | (121)
Accumulated Other Comprehensive Income (Loss), Ending balance | (10) | 50
Other [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |
Accumulated Other Comprehensive Income (Loss), Beginning Balance | 2 | 2
Other comprehensive income (loss) for period, before reclassifications | 0 | 0
Reclassification of losses (gains) to net income during period | 0 | 0
Total other comprehensive income (loss) for period | 0 | 0
Accumulated Other Comprehensive Income (Loss), Ending balance | 2 | 2
Reclassification of Losses (Gains) out of Accumulated Other Comprehensive Income (Loss) [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |
Total | (4) | (30)
Reclassification of Losses (Gains) out of Accumulated Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member] | Interest Rate Derivatives [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |
Interest expense | (2) | 2
Reclassification of Losses (Gains) out of Accumulated Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member] | Commodity Derivatives [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |
Revenue | (19) | (24)
Operating costs and expenses | $ 17 | $ (8)

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