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Stockholders' Equity - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 02, 2025
Feb. 12, 2025
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2024
Jul. 24, 2025
Jun. 01, 2025
Dec. 31, 2024
Jul. 27, 2022
Class of Stock [Line Items]                  
Preferred stock, aggregate liquidation preference     $ 6,871         $ 9,329  
Secondary Public Stock Offering                  
Class of Stock [Line Items]                  
Sales price per share (in USD per share)   $ 79.25              
Proceeds from offering   $ 13,100              
Common Stock                  
Class of Stock [Line Items]                  
Shares repurchased (in shares)     3,900,000 0 0        
Value of shares repurchased     $ 351            
Share repurchase, authorized amount                 $ 15,000
Remaining amount authorized for share repurchase     $ 6,900            
Common Stock | Subsequent Event [Member]                  
Class of Stock [Line Items]                  
Share repurchase, authorized amount           $ 20,000      
Common Stock | Secondary Public Stock Offering                  
Class of Stock [Line Items]                  
Number of shares sold (in shares)   133,800,000              
Nonvoting Common Stock                  
Class of Stock [Line Items]                  
Shares repurchased (in shares)   19,200,000              
Per share value of shares repurchased (in USD per share)   $ 77.982              
Value of shares repurchased   $ 1,500              
Common stock outstanding (in shares)   0              
Nonvoting Common Stock | Secondary Public Stock Offering                  
Class of Stock [Line Items]                  
Number of shares sold (in shares)   31,700,000              
Series G                  
Class of Stock [Line Items]                  
Number of shares redeemed (in shares) 24,580                
Deemed dividend $ 30                
Depository Shares                  
Class of Stock [Line Items]                  
Number of shares redeemed (in shares) 2,457,964                
Ownership interest in shares redeemed             1.00%    
Redemption price per share (in USD per share) $ 1,000                
Preferred stock, aggregate liquidation preference $ 2,500                
CSC Preferred Stock                  
Class of Stock [Line Items]                  
Number of shares redeemed (in shares)       0 0