v3.25.3
Investment Securities - Schedule of Gross Pre-Tax Unrealized Losses on Investment Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months $ 11,468 $ 18,678
Available for sale, gross unrealized losses less than 12 months 33 136
Available for sale, fair value 12 months or longer 13,944 10,412
Available for sale, gross unrealized losses 12 months or longer 108 147
Available for sale, fair value total 25,412 29,090
Available for sale, gross unrealized losses total 141 283
Total U.S. Treasury and federal agencies    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 5,729 11,855
Available for sale, gross unrealized losses less than 12 months 21 84
Available for sale, fair value 12 months or longer 11,372 6,795
Available for sale, gross unrealized losses 12 months or longer 97 122
Available for sale, fair value total 17,101 18,650
Available for sale, gross unrealized losses total 118 206
Direct obligations    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 2,901 8,113
Available for sale, gross unrealized losses less than 12 months 1 25
Available for sale, fair value 12 months or longer 7,589 2,435
Available for sale, gross unrealized losses 12 months or longer 24 27
Available for sale, fair value total 10,490 10,548
Available for sale, gross unrealized losses total 25 52
Mortgage-backed securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 2,828 3,742
Available for sale, gross unrealized losses less than 12 months 20 59
Available for sale, fair value 12 months or longer 3,783 4,360
Available for sale, gross unrealized losses 12 months or longer 73 95
Available for sale, fair value total 6,611 8,102
Available for sale, gross unrealized losses total 93 154
Total non-U.S. debt securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 5,308 6,124
Available for sale, gross unrealized losses less than 12 months 12 52
Available for sale, fair value 12 months or longer 2,570 3,542
Available for sale, gross unrealized losses 12 months or longer 11 24
Available for sale, fair value total 7,878 9,666
Available for sale, gross unrealized losses total 23 76
Mortgage-backed securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 70 730
Available for sale, gross unrealized losses less than 12 months 1 1
Available for sale, fair value 12 months or longer 91 225
Available for sale, gross unrealized losses 12 months or longer 0 0
Available for sale, fair value total 161 955
Available for sale, gross unrealized losses total 1 1
Asset-backed securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 208 387
Available for sale, gross unrealized losses less than 12 months 0 0
Available for sale, fair value 12 months or longer 243 506
Available for sale, gross unrealized losses 12 months or longer 1 2
Available for sale, fair value total 451 893
Available for sale, gross unrealized losses total 1 2
Non-U.S. sovereign, supranational and non-U.S. agency    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 5,005 4,695
Available for sale, gross unrealized losses less than 12 months 11 49
Available for sale, fair value 12 months or longer 2,225 2,695
Available for sale, gross unrealized losses 12 months or longer 10 20
Available for sale, fair value total 7,230 7,390
Available for sale, gross unrealized losses total 21 69
Other    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 25 312
Available for sale, gross unrealized losses less than 12 months 0 2
Available for sale, fair value 12 months or longer 11 116
Available for sale, gross unrealized losses 12 months or longer 0 2
Available for sale, fair value total 36 428
Available for sale, gross unrealized losses total 0 4
Total asset-backed securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 431 696
Available for sale, gross unrealized losses less than 12 months 0 0
Available for sale, fair value 12 months or longer 2 0
Available for sale, gross unrealized losses 12 months or longer 0 0
Available for sale, fair value total 433 696
Available for sale, gross unrealized losses total 0 0
Student loans    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 7 12
Available for sale, gross unrealized losses less than 12 months 0 0
Available for sale, fair value 12 months or longer 0 0
Available for sale, gross unrealized losses 12 months or longer 0 0
Available for sale, fair value total 7 12
Available for sale, gross unrealized losses total 0 0
Collateralized loan obligations    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 424 684
Available for sale, gross unrealized losses less than 12 months 0 0
Available for sale, fair value 12 months or longer 2 0
Available for sale, gross unrealized losses 12 months or longer 0 0
Available for sale, fair value total 426 684
Available for sale, gross unrealized losses total $ 0 0
State and political subdivisions    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months   0
Available for sale, gross unrealized losses less than 12 months   0
Available for sale, fair value 12 months or longer   26
Available for sale, gross unrealized losses 12 months or longer   0
Available for sale, fair value total   26
Available for sale, gross unrealized losses total   0
Other    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months   3
Available for sale, gross unrealized losses less than 12 months   0
Available for sale, fair value 12 months or longer   49
Available for sale, gross unrealized losses 12 months or longer   1
Available for sale, fair value total   52
Available for sale, gross unrealized losses total   $ 1