v3.26.3
Stockholders' Equity (Details)
$ / shares in Units, shares in Millions, $ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 05, 2026
USD ($)
day
$ / shares
shares
Jun. 04, 2026
USD ($)
$ / shares
shares
Jun. 01, 2026
USD ($)
Oct. 28, 2026
$ / shares
Sep. 30, 2026
USD ($)
$ / shares
shares
Sep. 30, 2025
USD ($)
$ / shares
Sep. 30, 2026
USD ($)
$ / shares
shares
Sep. 30, 2025
USD ($)
$ / shares
Dec. 31, 2025
$ / shares
Apr. 30, 2025
USD ($)
Stockholders Equity Note [Line Items]                    
Common stock and capital stock, par value (in dollars per share) | $ / shares   $ 0.001     $ 0.001   $ 0.001   $ 0.001  
Sale of stock, consideration received on transaction   $ 10,000                
Preferred stock dividend rate, percentage             6.25%   6.25%  
Depository share conversion ratio 0.05                  
Preferred stock, par value (in dollars per share) | $ / shares         0.001   $ 0.001   $ 0.001  
Preferred stock, liquidation preference (in dollars per share) | $ / shares         $ 1,000   $ 1,000   $ 1,000  
Depository shares, liquidation preference per share (usd per share) | $ / shares $ 50                  
Proceeds from issuance of mandatory convertible preferred stock, net of costs $ 19,000           $ 19,063 $ 0    
Purchase of capped call options             1,011      
Proceeds from issuance of common stock             42,870 $ 0    
Dividends preferred stock         $ 234   234      
Dividends common stock cash         $ 2,700   $ 7,900      
Dividends and dividend equivalents declared (in dollars per share) | $ / shares         $ 0.22 $ 0.21 $ 0.65 $ 0.62    
Preferred stock dividend declared per share (USD per share) | $ / shares         $ 12.15   $ 12.15      
Repurchases of capital stock           $ 11,553   $ 40,117    
Subsequent Event                    
Stockholders Equity Note [Line Items]                    
Dividends and dividend equivalents declared (in dollars per share) | $ / shares       $ 0.22            
Preferred stock dividend declared per share (USD per share) | $ / shares       15.63            
Series A and Series B Preferred Stock and Additional Paid-In Capital                    
Stockholders Equity Note [Line Items]                    
Purchase of capped call options $ 1,000           $ 1,011      
Share Repurchase Program                    
Stockholders Equity Note [Line Items]                    
Repurchases of capital stock         $ 0   0      
Remaining amount available for repurchase         69,500   69,500      
Equity derivatives                    
Stockholders Equity Note [Line Items]                    
Capped call premium price, percentage 50.00%                  
Public Stock Offering                    
Stockholders Equity Note [Line Items]                    
Sale of stock, consideration received on transaction   $ 20,500                
At-the-Market Program                    
Stockholders Equity Note [Line Items]                    
Equity distribution agreement, maximum aggregate sales proceeds     $ 40,000              
Common stock available for future issuance         27,600   27,600      
Common Stock, Class A And C | Share Repurchase Program                    
Stockholders Equity Note [Line Items]                    
Authorized share repurchase amount                   $ 70,000
Class A Common Stock                    
Stockholders Equity Note [Line Items]                    
Dividends common stock cash         $ 1,300   $ 3,800      
Class A Common Stock | Equity derivatives                    
Stockholders Equity Note [Line Items]                    
Capped call transactions cap price (in dollars per share) | $ / shares $ 532.6704                  
Class A Common Stock | Public Stock Offering                    
Stockholders Equity Note [Line Items]                    
Number of shares issued in transaction (in shares) | shares   29                
Sale of stock, price per share (in dollars per share) | $ / shares   $ 355.1982                
Class A Common Stock | Private Placement                    
Stockholders Equity Note [Line Items]                    
Number of shares issued in transaction (in shares) | shares   14                
Class A Common Stock | At-the-Market Program                    
Stockholders Equity Note [Line Items]                    
Common stock and mandatory convertible preferred stock issued (in shares) | shares         12   12      
Proceeds from issuance of common stock         $ 4,300   $ 4,300      
Class C Common Stock                    
Stockholders Equity Note [Line Items]                    
Dividends common stock cash         $ 1,200   $ 3,600      
Class C Common Stock | Public Stock Offering                    
Stockholders Equity Note [Line Items]                    
Number of shares issued in transaction (in shares) | shares   29                
Sale of stock, price per share (in dollars per share) | $ / shares   $ 351.8018                
Class C Common Stock | Private Placement                    
Stockholders Equity Note [Line Items]                    
Number of shares issued in transaction (in shares) | shares   14                
Class C Common Stock | At-the-Market Program                    
Stockholders Equity Note [Line Items]                    
Common stock and mandatory convertible preferred stock issued (in shares) | shares         24   24      
Proceeds from issuance of common stock         $ 8,100   $ 8,100      
Depositary Shares                    
Stockholders Equity Note [Line Items]                    
Common stock and mandatory convertible preferred stock issued (in shares) | shares 385                  
Depositary Shares | Subsequent Event                    
Stockholders Equity Note [Line Items]                    
Preferred stock dividend declared per share (USD per share) | $ / shares       $ 0.78            
Mandatory Convertible Preferred Stock                    
Stockholders Equity Note [Line Items]                    
Common stock and mandatory convertible preferred stock issued (in shares) | shares 19                  
Preferred stock dividend rate, percentage 6.25%                  
Preferred stock, par value (in dollars per share) | $ / shares $ 0.001                  
Preferred stock, liquidation preference (in dollars per share) | $ / shares $ 1,000                  
Convertible preferred stock, price determination, consecutive trading day final averaging period prior to mandatory conversion date, period | day 20                  
Mandatory Convertible Preferred Stock | Series A and Series B Preferred Stock and Additional Paid-In Capital                    
Stockholders Equity Note [Line Items]                    
Common stock and mandatory convertible preferred stock issued (in shares) | shares             19      
Series A Mandatory Convertible Preferred Stock                    
Stockholders Equity Note [Line Items]                    
Dividends preferred stock         117   $ 117      
Series A Mandatory Convertible Preferred Stock | Minimum                    
Stockholders Equity Note [Line Items]                    
Preferred stock conversion ratio 2.2520                  
Series A Mandatory Convertible Preferred Stock | Maximum                    
Stockholders Equity Note [Line Items]                    
Preferred stock conversion ratio 2.8160                  
Series B Mandatory Convertible Preferred Stock                    
Stockholders Equity Note [Line Items]                    
Dividends preferred stock         117   117      
Series B Mandatory Convertible Preferred Stock | Minimum                    
Stockholders Equity Note [Line Items]                    
Preferred stock conversion ratio 2.2740                  
Series B Mandatory Convertible Preferred Stock | Maximum                    
Stockholders Equity Note [Line Items]                    
Preferred stock conversion ratio 2.8420                  
Class B Common Stock                    
Stockholders Equity Note [Line Items]                    
Dividends common stock cash         $ 182   $ 541      
Class B Common Stock | Equity derivatives                    
Stockholders Equity Note [Line Items]                    
Capped call transactions cap price (in dollars per share) | $ / shares $ 527.7974