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Equity - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Beginning Balance $ (17) $ (35)
Net deferred gain from cash flow hedges 0 3
Actuarial losses (gain) 0 1
Other comprehensive income (loss) 0 2
Ending Balance (17) (33)
CERC    
Beginning Balance 17 16
Net deferred gain from cash flow hedges 0 0
Actuarial losses (gain) 0 (1)
Other comprehensive income (loss) 0 (1)
Ending Balance 17 15
Other Pension, Postretirement and Supplemental Plans    
Remeasurement of pension and other postretirement plans 0 (2)
Other Pension, Postretirement and Supplemental Plans | CERC    
Remeasurement of pension and other postretirement plans $ 0 $ 0