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Consolidated Statement of Capitalization - USD ($)
shares in Millions, $ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Regulated Operations [Abstract]        
TOTAL EQUITY BEFORE ACCUMULATED OTHER COMPREHENSIVE LOSS (in shares) 355 354    
TOTAL EQUITY BEFORE ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) $ 20,665 $ 20,032    
Pension plan liability adjustments, net of taxes 23 7    
Unrealized gains/(losses) on derivatives qualified as cash flow hedges, less reclassification adjustment for gains/(losses) included in net income and reclassification adjustment for unrealized losses included in regulatory assets, net of taxes (1) (2)    
TOTAL ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES 22 5    
Equity 20,687 20,037    
Noncontrolling interest 202 299    
TOTAL EQUITY (See Statement of Equity) $ 20,889 $ 20,336 $ 19,065 $ 18,213