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Consolidated Condensed Statements of Comprehensive Income - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Statement of Comprehensive Income [Abstract]    
Net income $ 888 $ 1,263
Other comprehensive income (loss) items:    
Gains on derivatives [1] 9 63
Pension and postretirement losses [2] (4) (5)
Other 0 2
Other comprehensive income, net of tax 5 60
Comprehensive income attributable to preferred and common stockholders $ 893 $ 1,323
[1] Net of tax expense of zero for the three months ended March 31, 2024 and 2023.
[2] Net of tax expense of $1 million for the three months ended March 31, 2024 and 2023.