v3.25.3
Fair Value - Schedule of Reported and Estimated Fair Values of Financial Assets and Liabilities Not Carried at Fair Value (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Financial Assets:    
Cash and due from banks $ 4,756 $ 3,145
Interest-bearing deposits with banks 122,642 112,957
Securities purchased under resale agreements 7,730 6,679
Investment securities held-to-maturity 36,654 41,906
Financial Liabilities:    
Non-interest-bearing 34,395 33,180
Interest-bearing - U.S. 169,013 166,483
Interest-bearing - non-U.S. 76,591 62,257
Securities sold under repurchase agreements 206 3,681
Other short-term borrowings 9,825 9,840
Pricing Methods with Significant Observable Market Inputs (Level 2)    
Financial Assets:    
Net loans 15 14
Reported Amount     
Financial Assets:    
Cash and due from banks 4,756 3,145
Interest-bearing deposits with banks 122,642 112,957
Securities purchased under resale agreements 7,730 6,679
Investment securities held-to-maturity 40,934 47,727
Net loans 46,470 43,026
Other 10,555 6,752
Financial Liabilities:    
Non-interest-bearing 34,395 33,180
Interest-bearing - U.S. 169,013 166,483
Interest-bearing - non-U.S. 76,591 62,257
Securities sold under repurchase agreements 206 3,681
Other short-term borrowings 9,825 9,840
Long-term debt 24,688 23,272
Other 10,555 6,752
Estimated Fair Value    
Financial Assets:    
Cash and due from banks 4,756 3,145
Interest-bearing deposits with banks 122,642 112,957
Securities purchased under resale agreements 7,730 6,679
Investment securities held-to-maturity 36,654 41,906
Net loans 46,303 42,839
Other 10,555 6,752
Financial Liabilities:    
Non-interest-bearing 34,395 33,180
Interest-bearing - U.S. 169,013 166,483
Interest-bearing - non-U.S. 76,591 62,257
Securities sold under repurchase agreements 206 3,681
Other short-term borrowings 9,825 9,840
Long-term debt 24,719 23,078
Other 10,555 6,752
Estimated Fair Value | Quoted Market Prices in Active Markets (Level 1)    
Financial Assets:    
Cash and due from banks 4,756 3,145
Interest-bearing deposits with banks 0 0
Securities purchased under resale agreements 0 0
Investment securities held-to-maturity 1,996 5,354
Net loans 0 0
Other 0 0
Financial Liabilities:    
Non-interest-bearing 0 0
Interest-bearing - U.S. 0 0
Interest-bearing - non-U.S. 0 0
Securities sold under repurchase agreements 0 0
Other short-term borrowings 0 0
Long-term debt 0 0
Other 0 0
Estimated Fair Value | Pricing Methods with Significant Observable Market Inputs (Level 2)    
Financial Assets:    
Cash and due from banks 0 0
Interest-bearing deposits with banks 122,642 112,957
Securities purchased under resale agreements 7,730 6,679
Investment securities held-to-maturity 34,658 36,552
Net loans 44,675 41,097
Other 10,555 6,752
Financial Liabilities:    
Non-interest-bearing 34,395 33,180
Interest-bearing - U.S. 169,013 166,483
Interest-bearing - non-U.S. 76,591 62,257
Securities sold under repurchase agreements 206 3,681
Other short-term borrowings 9,825 9,840
Long-term debt 24,587 22,882
Other 10,555 6,752
Estimated Fair Value | Pricing Methods with Significant Unobservable Market Inputs (Level 3)    
Financial Assets:    
Cash and due from banks 0 0
Interest-bearing deposits with banks 0 0
Securities purchased under resale agreements 0 0
Investment securities held-to-maturity 0 0
Net loans 1,628 1,742
Other 0 0
Financial Liabilities:    
Non-interest-bearing 0 0
Interest-bearing - U.S. 0 0
Interest-bearing - non-U.S. 0 0
Securities sold under repurchase agreements 0 0
Other short-term borrowings 0 0
Long-term debt 132 196
Other $ 0 $ 0