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Supplementary Financial Information - Schedule of Other Noncurrent Liabilities and Deferred Credits (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Asset Retirement Obligations [Line Items]    
Retirement and other employee benefits $ 247 $ 237
Winter Storm Uri impacts 26 35
Finite-lived intangible liabilities, net 131 140
Regulatory liabilities 209 0
Finance lease liabilities 227 237
Uncertain tax positions, including accrued interest 0 13
Liability for third-party remediation 17 37
Accrued severance costs 36 36
Other accrued expenses 58 269
Total other noncurrent liabilities and deferred credits 951 1,004
Nuclear Plant Decommissioning    
Asset Retirement Obligations [Line Items]    
Regulatory liabilities $ 209  
Regulatory asset   $ 40