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CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)
$ in Millions
Total
Common Stock
Additional Paid In Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2021   544,025,269      
Beginning balance at Dec. 31, 2021 $ 15,612 $ 1,360 $ 7,803 $ 6,572 $ (123)
Increase (Decrease) in Stockholders' Equity          
Net income 380     380  
Other comprehensive income 7       7
Dividends declared on common stock (USD per share)   $ 0.4875      
Dividends declared on common stock (265)     (265)  
Issuances of common stock (in shares)   505,718      
Issuances of common stock 12 $ 1 11    
Share-based compensation (14)   (13) (1)  
Balance (in shares) at Mar. 31, 2022   544,530,987      
Ending balance at Mar. 31, 2022 $ 15,732 $ 1,361 7,801 6,686 (116)
Balance (in shares) at Dec. 31, 2022 549,578,018 549,578,018      
Beginning balance at Dec. 31, 2022 $ 16,675 $ 1,374 8,155 7,239 (93)
Increase (Decrease) in Stockholders' Equity          
Net income 418     418  
Other comprehensive income (4)       (4)
Dividends declared on common stock (USD per share)   $ 0.52      
Dividends declared on common stock (286)     (286)  
Issuances of common stock (in shares)   644,174      
Issuances of common stock 18 $ 2 16    
Share-based compensation $ (3)   (2) (1)  
Balance (in shares) at Mar. 31, 2023 550,222,192 550,222,192      
Ending balance at Mar. 31, 2023 $ 16,818 $ 1,376 $ 8,169 $ 7,370 $ (97)