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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Statement of Comprehensive Income [Abstract]        
Net income $ 454 $ 432 $ 1,971 $ 1,237
Other comprehensive income (loss), net of tax        
Change in fair value of derivatives, net of tax of $(3), $(31), $(25) and $(17), respectively 12 107 86 57
Derivative amounts reclassified to net income, net of tax of $4, $(16), $14 and $(57), respectively (7) 54 (44) 190
Change in retirement and other postretirement benefit plan obligations, net of tax of $(1), $(1), $(1) and $(3), respectively 2 3 3 9
Other comprehensive income (loss) of unconsolidated affiliates, net of tax of $—, $(1), $1 and $(5), respectively 0 3 (5) 16
Total other comprehensive income, net of tax 7 167 40 272
Comprehensive income $ 461 $ 599 $ 2,011 $ 1,509