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Shareholders' Equity - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
May 15, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Class of Stock [Line Items]            
Repurchase of common stock   $ 1,212 $ 757 $ 2,355 $ 1,260  
Net proceeds from preferred stock issued       495 $ 0  
Common Stock            
Class of Stock [Line Items]            
Amount authorized for repurchase           $ 10,000
Repurchase of common stock       $ 2,400    
Repurchase of common stock (in shares)       46,600,000    
Common stock, remaining dollar amount authorized for repurchase   $ 7,700   $ 7,700    
Series S Preferred Stock            
Class of Stock [Line Items]            
Preferred stock, value, issued $ 500          
Dividend rate 6.25%          
Net proceeds from preferred stock issued $ 495          
Treasury rate 2.13%          
Depositary shares (in shares) 20,000