v3.26.1
Investment Securities - Schedule of Gross Pre-Tax Unrealized Losses on Investment Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months $ 19,253 $ 8,133
Available for sale, gross unrealized losses less than 12 months 99 35
Available for sale, fair value 12 months or longer 5,140 8,265
Available for sale, gross unrealized losses 12 months or longer 58 62
Available for sale, fair value total 24,393 16,398
Available for sale, gross unrealized losses total 157 97
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 7,800 2,023
Available for sale, gross unrealized losses less than 12 months 44 5
Available for sale, fair value 12 months or longer 4,159 6,081
Available for sale, gross unrealized losses 12 months or longer 51 54
Available for sale, fair value total 11,959 8,104
Available for sale, gross unrealized losses total 95 59
Direct obligations    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 3,629 756
Available for sale, gross unrealized losses less than 12 months 11 2
Available for sale, fair value 12 months or longer 966 2,063
Available for sale, gross unrealized losses 12 months or longer 1 3
Available for sale, fair value total 4,595 2,819
Available for sale, gross unrealized losses total 12 5
Mortgage-backed securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 4,171 1,267
Available for sale, gross unrealized losses less than 12 months 33 3
Available for sale, fair value 12 months or longer 3,193 4,018
Available for sale, gross unrealized losses 12 months or longer 50 51
Available for sale, fair value total 7,364 5,285
Available for sale, gross unrealized losses total 83 54
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 10,946 5,042
Available for sale, gross unrealized losses less than 12 months 55 29
Available for sale, fair value 12 months or longer 931 2,184
Available for sale, gross unrealized losses 12 months or longer 7 8
Available for sale, fair value total 11,877 7,226
Available for sale, gross unrealized losses total 62 37
Mortgage-backed securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 1,027 617
Available for sale, gross unrealized losses less than 12 months 2 1
Available for sale, fair value 12 months or longer 47 73
Available for sale, gross unrealized losses 12 months or longer 0 0
Available for sale, fair value total 1,074 690
Available for sale, gross unrealized losses total 2 1
Asset-backed securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 928 425
Available for sale, gross unrealized losses less than 12 months 1 0
Available for sale, fair value 12 months or longer 103 168
Available for sale, gross unrealized losses 12 months or longer 0 1
Available for sale, fair value total 1,031 593
Available for sale, gross unrealized losses total 1 1
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 8,590 3,871
Available for sale, gross unrealized losses less than 12 months 49 28
Available for sale, fair value 12 months or longer 781 1,943
Available for sale, gross unrealized losses 12 months or longer 7 7
Available for sale, fair value total 9,371 5,814
Available for sale, gross unrealized losses total 56 35
Other    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 401 129
Available for sale, gross unrealized losses less than 12 months 3 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 401 129
Available for sale, gross unrealized losses total 3 0
Total asset-backed securities    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 507 1,068
Available for sale, gross unrealized losses less than 12 months 0 1
Available for sale, fair value 12 months or longer 50 0
Available for sale, gross unrealized losses 12 months or longer 0 0
Available for sale, fair value total 557 1,068
Available for sale, gross unrealized losses total 0 1
Collateralized loan obligations    
Gross Pre-Tax Unrealized Losses On Investment Securities [Line Items]    
Available for sale, fair value less than 12 months 507 1,068
Available for sale, gross unrealized losses less than 12 months 0 1
Available for sale, fair value 12 months or longer 50 0
Available for sale, gross unrealized losses 12 months or longer 0 0
Available for sale, fair value total 557 1,068
Available for sale, gross unrealized losses total $ 0 $ 1