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Stock-Based Incentive Compensation Plans and Employee Benefit Plans - Stock Based Incentive Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]      
Income tax benefit recognized $ 8 $ 15 $ 12
Actual tax benefit realized for tax deductions $ 19 $ 17 $ 6
Performance Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance period (in years) 3 years 3 years 3 years
Shares      
Nonvested, beginning of period (in shares) 5,225,000,000    
Granted (in shares) 1,727,000,000    
Forfeited or cancelled (in shares) (220,000,000)    
Vested and released to participants (in shares) (1,824,000,000)    
Nonvested, end of period (in shares) 4,908,000,000 5,225,000,000  
Weighted-Average Grant Date Fair Value      
Nonvested, beginning of period (in dollars per share) $ 25.95    
Granted (in dollars per share) 27.92 $ 29.18 $ 28.12
Forfeited or cancelled (in dollars per share) 28.09    
Vested and released to participants (in dollars per share) 21.87    
Nonvested, end of period (in dollars per share) $ 28.14 $ 25.95  
Remaining average contractual life of nonvested shares outstanding (in years) 1 year    
Aggregate intrinsic value $ 105    
Total intrinsic value of awards received by participants 51 $ 47 $ 13
Vested grant date fair value $ 40 $ 37 $ 13
Stock Awards      
Shares      
Nonvested, beginning of period (in shares) 1,861,000,000    
Granted (in shares) 438,000,000    
Forfeited or cancelled (in shares) (43,000,000)    
Vested and released to participants (in shares) (1,139,000,000)    
Nonvested, end of period (in shares) 1,117,000,000 1,861,000,000  
Weighted-Average Grant Date Fair Value      
Nonvested, beginning of period (in dollars per share) $ 26.91    
Granted (in dollars per share) 28.25 $ 30.83 $ 28.44
Forfeited or cancelled (in dollars per share) 27.92    
Vested and released to participants (in dollars per share) 25.92    
Nonvested, end of period (in dollars per share) $ 28.20 $ 26.91  
Remaining average contractual life of nonvested shares outstanding (in years) 6 months    
Aggregate intrinsic value $ 36    
Total intrinsic value of awards received by participants 33 $ 28 $ 14
Vested grant date fair value 30 23 13
Performance and Stock Awards      
Weighted-Average Grant Date Fair Value      
Unrecognized compensation cost related to non-vested performance and stock awards $ 39    
Weighted average period of recognition (in years) 1 year 8 months 12 days    
Operation And Maintenance Expense      
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]      
LTIP compensation expense $ 34 $ 65 $ 51
Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized for issuance under long-term incentive plans (in shares) 30,000,000