XML 79 R66.htm IDEA: XBRL DOCUMENT v3.25.0.1
Fair Value of FInancial Instruments Fair Value Unobservable Input Reconciliation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Net realized and unrealized losses $ 25 $ 26  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 (36)    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3   (13)  
Net liabilities from price risk management activities as of end of year 34 45 $ 32
Level 3 net unrealized losses that have been fully offset by the effect of regulatory accounting 30 $ 17  
Net realized losses $ 5