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Stockholders' Equity - Common Equity (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended 86 Months Ended
Jan. 22, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Feb. 12, 2025
Jul. 19, 2017
Dec. 19, 2014
Class of Stock [Line Items]              
Common share buy-back program, amount           $ 3,000  
Total value of shares repurchased   $ 7 $ 522 $ 368      
Average repurchase price per share   $ 16.50 $ 16.56 $ 16.94      
Per share cash dividend declared for the period   1.15 1.13 1.11      
Per share cash dividend paid in the period   $ 1.1450 $ 1.1250 $ 1.1025      
Subsequent Event              
Class of Stock [Line Items]              
Total value of shares repurchased         $ 1,472    
Average repurchase price per share         $ 17.09    
Remaining repurchase authorization amount         $ 1,500    
Per share cash dividend declared for the period $ 0.2875            
Equity distribution agreement | Class P              
Class of Stock [Line Items]              
Value of Stock Available for Sale Under Equity Distribution Agreement             $ 5,000
Shares, Issued   0 0 0      
Common stock              
Class of Stock [Line Items]              
Total value of shares repurchased       $ 1      
Total number of shares repurchased   1 32 21      
Common stock | Subsequent Event              
Class of Stock [Line Items]              
Total number of shares repurchased         86