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Fair Value (Level 3 Reconciliation) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs $ (230) $ (131) $ (230) $ (131) $ (236) $ (245) $ (130) $ (115)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings 4   (2) (16)        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)     14 (2)        
Foreign currency translation adjustments, net of $0 income tax for all periods 11 42 13 72        
Fair Value Measurements With Unobservable Inputs Reconciliation Recurring Basis Regulatory Assets Liabilities (25)   (25)          
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements [Abstract]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements 11 9 12 8        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3       1        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3   2            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3       (1)        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) 4 14 (2) (30)        
Other derivative Contract [Member]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs (3)   (3)          
Interest Rate Contract [Member]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs 0 0 0 0   0 (2) (1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings 0   0 0        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)     0 0        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements [Abstract]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3       0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3   (2)            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3       (1)        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) 0 0 0 0        
Foreign currency derivatives [Member]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs 0 35 0 35   0 43 52
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings 0   0 2        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)     0 1        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements [Abstract]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements 0 (10) 0 (20)        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3       0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3   0            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3       0        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) 0 (6) 0 (12)        
Commodity Contract [Member]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs (25) (22) (25) (22) $ (27) $ (40) $ 2 $ (21)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings 0   0 0        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)     14 (3)        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements [Abstract]                
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements (5) (1) (6) (2)        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3       1        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3   0            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3       0        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease) $ 0 $ 0 $ 0 $ 0