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Condensed Statements of Consolidated Changes in Equity (Unaudited) - USD ($)
$ in Millions
Total
Cumulative Preferred Stock
Cumulative Preferred Stock
Series A Preferred Stock
Common Stock
Additional Paid-in-Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Balance, beginning of period (in shares) at Dec. 31, 2022   1,000,000          
Balance, beginning of period at Dec. 31, 2022   $ 790   $ 6 $ 8,568 $ 709 $ (31)
Balance, beginning of period (in shares) at Dec. 31, 2022       630,000,000      
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Redemption of Series A Preferred Stock (in shares)     (1,000,000)        
Redemption of Series A Preferred Stock     $ (790)        
Issuances of common stock (in shares)       0      
Issuances of Common Stock, net of issuance costs       $ 0 0    
Issuances related to benefit and investment plans (in shares)       1,000,000      
Issuances related to benefit and investment plans       $ 0 13    
Net income $ 725         725  
Common Stock dividends declared (see Note 18)           (366)  
Preferred Stock dividends declared (see Note 18)           (41)  
Other comprehensive loss 2           2
Balance, end of period (in shares) at Sep. 30, 2023   0          
Balance, end of period at Sep. 30, 2023 9,585 $ 0   $ 6 8,581 1,027 (29)
Balance, end of period (in shares) at Sep. 30, 2023       631,000,000      
Balance, beginning of period (in shares) at Jun. 30, 2023   1,000,000          
Balance, beginning of period at Jun. 30, 2023   $ 790   $ 6 8,570 1,032 (32)
Balance, beginning of period (in shares) at Jun. 30, 2023       631,000,000      
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Redemption of Series A Preferred Stock (in shares)     (1,000,000)        
Redemption of Series A Preferred Stock     $ (790)        
Issuances of common stock (in shares)       0      
Issuances of Common Stock, net of issuance costs       $ 0 0    
Issuances related to benefit and investment plans (in shares)       0      
Issuances related to benefit and investment plans       $ 0 11    
Net income 282         282  
Common Stock dividends declared (see Note 18)           (246)  
Preferred Stock dividends declared (see Note 18)           (41)  
Other comprehensive loss 3           3
Balance, end of period (in shares) at Sep. 30, 2023   0          
Balance, end of period at Sep. 30, 2023 9,585 $ 0   $ 6 8,581 1,027 (29)
Balance, end of period (in shares) at Sep. 30, 2023       631,000,000      
Balance, beginning of period (in shares) at Dec. 31, 2023   0          
Balance, beginning of period at Dec. 31, 2023 $ 9,667 $ 0   $ 6 8,604 1,092 (35)
Balance, beginning of period (in shares) at Dec. 31, 2023 631,225,829     631,000,000      
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Redemption of Series A Preferred Stock (in shares)     0        
Redemption of Series A Preferred Stock     $ 0        
Issuances of common stock (in shares)       19,000,000      
Issuances of Common Stock, net of issuance costs       $ 0 494    
Issuances related to benefit and investment plans (in shares)       2,000,000      
Issuances related to benefit and investment plans       $ 0 (7)    
Net income $ 771         771  
Common Stock dividends declared (see Note 18)           (395)  
Preferred Stock dividends declared (see Note 18)           0  
Other comprehensive loss 5           5
Balance, end of period (in shares) at Sep. 30, 2024   0          
Balance, end of period at Sep. 30, 2024 $ 10,535 $ 0   $ 6 9,091 1,468 (30)
Balance, end of period (in shares) at Sep. 30, 2024 651,721,174     652,000,000      
Balance, beginning of period (in shares) at Jun. 30, 2024   0          
Balance, beginning of period at Jun. 30, 2024   $ 0   $ 6 8,836 1,542 (30)
Balance, beginning of period (in shares) at Jun. 30, 2024       642,000,000      
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Redemption of Series A Preferred Stock (in shares)     0        
Redemption of Series A Preferred Stock     $ 0        
Issuances of common stock (in shares)       10,000,000      
Issuances of Common Stock, net of issuance costs       $ 0 247    
Issuances related to benefit and investment plans (in shares)       0      
Issuances related to benefit and investment plans       $ 0 8    
Net income $ 193         193  
Common Stock dividends declared (see Note 18)           (267)  
Preferred Stock dividends declared (see Note 18)           0  
Other comprehensive loss 0           0
Balance, end of period (in shares) at Sep. 30, 2024   0          
Balance, end of period at Sep. 30, 2024 $ 10,535 $ 0   $ 6 $ 9,091 $ 1,468 $ (30)
Balance, end of period (in shares) at Sep. 30, 2024 651,721,174     652,000,000