v3.25.4
Preferred Stock (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
vote
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 4,662,300 4,742,300  
Preferred stock, shares issued and outstanding 4,600,746 4,680,752  
Preferred stock, liquidation preference, value | $ $ 17,376 $ 19,376  
Preferred stock, carrying value | $ $ 16,608 $ 18,608  
Detail of Preferred Stock [Abstract]      
Voting rights If issued, preference shares would be limited to one vote per share    
Number of additional common stock shares per preferred share 16.5916 16.5916  
Preferred stock, convertible, settlement method [Extensible Enumeration] Net Combination Settlement [Member] Net Combination Settlement [Member]  
Preferred stock, convertible, control of rights [Fixed List] Holder Holder  
Preferred stock, no voting rights [Member]      
Detail of Preferred Stock [Abstract]      
Preferred shares authorized 20,000,000    
Preferred stock, par or stated value | $ $ 0    
Preferred stock, voting rights [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares issued and outstanding 0    
Detail of Preferred Stock [Abstract]      
Preferred shares authorized 4,000,000    
Preferred stock, par or stated value | $ $ 0    
Number of votes per share | vote 1    
Dividend Equalization Preferred Shares (DEP) [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 97,000 97,000  
Preferred stock, shares issued and outstanding 96,546 96,546  
Preferred stock, liquidation preference, value | $ $ 0 $ 0  
Preferred stock, carrying value | $ $ 0 $ 0  
Series L - 7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 4,025,000 4,025,000  
Preferred stock, shares issued and outstanding 3,967,900 3,967,906  
Preferred stock, liquidation preference, value | $ $ 3,968 $ 3,968  
Preferred stock, carrying value | $ $ 3,200 $ 3,200  
Preferred stock, dividend rate (percent) 7.50% 7.50%  
Detail of Preferred Stock [Abstract]      
Number of common stock shares per preferred share 6.3814 6.3814  
Dividends, preferred stock | $ $ 298 $ 298 $ 298
Series U - 5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 0 80,000  
Preferred stock, shares issued and outstanding 0 80,000  
Preferred stock, liquidation preference, value | $ $ 0 $ 2,000  
Preferred stock, carrying value | $ $ 0 $ 2,000  
Preferred stock, dividend rate (percent) 5.875% 5.875%  
Series Y - 5.625% Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 27,600 27,600  
Preferred stock, shares issued and outstanding 27,600 27,600  
Preferred stock, liquidation preference, value | $ $ 690 $ 690  
Preferred stock, carrying value | $ $ 690 $ 690  
Preferred stock, dividend rate (percent) 5.625% 5.625%  
Series Z - 4.75% Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 80,500 80,500  
Preferred stock, shares issued and outstanding 80,500 80,500  
Preferred stock, liquidation preference, value | $ $ 2,013 $ 2,013  
Preferred stock, carrying value | $ $ 2,013 $ 2,013  
Preferred stock, dividend rate (percent) 4.75% 4.75%  
Series AA - 4.70% Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 46,800 46,800  
Preferred stock, shares issued and outstanding 46,800 46,800  
Preferred stock, liquidation preference, value | $ $ 1,170 $ 1,170  
Preferred stock, carrying value | $ $ 1,170 $ 1,170  
Preferred stock, dividend rate (percent) 4.70% 4.70%  
Series BB - 3.90% Fixed-Reset Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 140,400 140,400  
Preferred stock, shares issued and outstanding 140,400 140,400  
Preferred stock, liquidation preference, value | $ $ 3,510 $ 3,510  
Preferred stock, carrying value | $ $ 3,510 $ 3,510  
Preferred stock, dividend rate (percent) 3.90% 3.90%  
Series CC - 4.375% Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 46,000 46,000  
Preferred stock, shares issued and outstanding 42,000 42,000  
Preferred stock, liquidation preference, value | $ $ 1,050 $ 1,050  
Preferred stock, carrying value | $ $ 1,050 $ 1,050  
Preferred stock, dividend rate (percent) 4.375% 4.375%  
Series DD - 4.25% Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 50,000 50,000  
Preferred stock, shares issued and outstanding 50,000 50,000  
Preferred stock, liquidation preference, value | $ $ 1,250 $ 1,250  
Preferred stock, carrying value | $ $ 1,250 $ 1,250  
Preferred stock, dividend rate (percent) 4.25% 4.25%  
Series EE - 7.625% Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 69,000 69,000  
Preferred stock, shares issued and outstanding 69,000 69,000  
Preferred stock, liquidation preference, value | $ $ 1,725 $ 1,725  
Preferred stock, carrying value | $ $ 1,725 $ 1,725  
Preferred stock, dividend rate (percent) 7.625% 7.625%  
Series FF - 6.85% Fixed Non-Cumulative Perpetual Class A Preferred Stock [Member]      
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]      
Preferred stock, shares authorized and designated 80,000 80,000  
Preferred stock, shares issued and outstanding 80,000 80,000  
Preferred stock, liquidation preference, value | $ $ 2,000 $ 2,000  
Preferred stock, carrying value | $ $ 2,000 $ 2,000  
Preferred stock, dividend rate (percent) 6.85% 6.85%