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Condensed Statements of Consolidated Comprehensive Income (Unaudited) - CERC - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Net income $ 350 $ 325
Adjustment to pension and other postretirement plans (net of tax of, $-0- and $-0-) (1) (1)
Other comprehensive loss 2 (1)
CERC    
Net income 264 212
Adjustment to pension and other postretirement plans (net of tax of, $-0- and $-0-) (1) (1)
Other comprehensive loss (1) (1)
Comprehensive income $ 263 $ 211