v3.26.1
Fair Value (Recurring Fair Value Measurements) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Assets    
Investment securities – available-for-sale $ 71,072 $ 68,135
Mortgage servicing rights 3,816 3,659
Financial derivatives 1,140 1,020
Liabilities    
Interest-bearing deposit, fair value 700 3,600
Financial derivatives 1,822 1,725
Other liabilities $ 100 $ 100
Assets At Fair Value | Assets, Total | Assets    
Liabilities    
Concentration risk, percentage 15.00% 15.00%
Level 3 Assets | Assets, Total | Assets    
Liabilities    
Concentration risk, percentage 8.00% 9.00%
Level 3 Assets | Assets | Assets    
Liabilities    
Concentration risk, percentage 1.00% 1.00%
Liabilities At Fair Value | Liabilities, Total | Liability    
Liabilities    
Concentration risk, percentage 1.00% 2.00%
Level Three Liabilities | Liabilities, Total | Liability    
Liabilities    
Concentration risk, percentage 3.00% 3.00%
Level Three Liabilities | Liability | Liability    
Liabilities    
Concentration risk, percentage 1.00% 1.00%
Fair Value, Recurring    
Assets    
Investment securities – available-for-sale $ 71,072 $ 68,135
Loans 1,118 1,112
Equity investments 3,408 3,642
Trading securities 6,666 6,766
Financial derivatives 3,085 2,672
Other assets 653 682
Total Assets 91,020 88,387
Liabilities    
Interest-bearing deposit, fair value 728 3,642
Other borrowed funds 1,297 948
Financial derivatives 4,009 3,626
Other liabilities 158 160
Total liabilities 6,192 8,376
Level 1 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 25,065 27,871
Loans 0 0
Equity investments 718 820
Trading securities 2,401 2,662
Financial derivatives 6 6
Other assets 503 506
Total Assets 28,693 31,865
Liabilities    
Interest-bearing deposit, fair value 0 0
Other borrowed funds 1,042 752
Financial derivatives 7 1
Other liabilities 0 0
Total liabilities 1,049 753
Level 2 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 45,256 39,495
Loans 519 492
Equity investments 0 0
Trading securities 4,265 4,104
Financial derivatives 3,074 2,660
Other assets 135 162
Total Assets 54,377 48,524
Liabilities    
Interest-bearing deposit, fair value 728 3,642
Other borrowed funds 250 189
Financial derivatives 3,967 3,546
Other liabilities 21 23
Total liabilities 4,966 7,400
Level 3    
Assets    
Equity investments 2,341 2,503
Level 3 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 751 769
Loans 599 620
Equity investments 2,341 2,503
Trading securities 0 0
Financial derivatives 5 6
Other assets 15 14
Total Assets 7,601 7,679
Liabilities    
Interest-bearing deposit, fair value 0 0
Other borrowed funds 5 7
Financial derivatives 35 79
Other liabilities 137 137
Total liabilities 177 223
Residential mortgage loans held for sale | Fair Value, Recurring    
Assets    
Mortgage loans held for sale 582 660
Residential mortgage loans held for sale | Level 1 | Fair Value, Recurring    
Assets    
Mortgage loans held for sale 0 0
Residential mortgage loans held for sale | Level 2 | Fair Value, Recurring    
Assets    
Mortgage loans held for sale 508 552
Residential mortgage loans held for sale | Level 3 | Fair Value, Recurring    
Assets    
Mortgage loans held for sale 74 108
Commercial mortgage loans held for sale | Fair Value, Recurring    
Assets    
Mortgage loans held for sale 620 1,059
Commercial mortgage loans held for sale | Level 1 | Fair Value, Recurring    
Assets    
Mortgage loans held for sale 0 0
Commercial mortgage loans held for sale | Level 2 | Fair Value, Recurring    
Assets    
Mortgage loans held for sale 620 1,059
Commercial mortgage loans held for sale | Level 3 | Fair Value, Recurring    
Assets    
Mortgage loans held for sale 0 0
U.S. Treasury and government agencies | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 26,499 28,897
U.S. Treasury and government agencies | Level 1 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 25,065 27,871
U.S. Treasury and government agencies | Level 2 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 1,434 1,026
U.S. Treasury and government agencies | Level 3 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Residential mortgage-backed | Mortgage-backed Securities Agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 35,653 30,663
Residential mortgage-backed | Mortgage-backed Securities Non-agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 533 548
Residential mortgage-backed | Level 1 | Mortgage-backed Securities Agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Residential mortgage-backed | Level 1 | Mortgage-backed Securities Non-agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Residential mortgage-backed | Level 2 | Mortgage-backed Securities Agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 35,653 30,663
Residential mortgage-backed | Level 2 | Mortgage-backed Securities Non-agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Residential mortgage-backed | Level 3 | Mortgage-backed Securities Agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Residential mortgage-backed | Level 3 | Mortgage-backed Securities Non-agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 533 548
Commercial mortgage servicing rights | Mortgage-backed Securities Agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 3,412 3,372
Commercial mortgage servicing rights | Mortgage-backed Securities Non-agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 226 252
Commercial mortgage servicing rights | Level 1 | Mortgage-backed Securities Agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Commercial mortgage servicing rights | Level 1 | Mortgage-backed Securities Non-agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Commercial mortgage servicing rights | Level 2 | Mortgage-backed Securities Agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 3,412 3,372
Commercial mortgage servicing rights | Level 2 | Mortgage-backed Securities Non-agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 147 173
Commercial mortgage servicing rights | Level 3 | Mortgage-backed Securities Agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Commercial mortgage servicing rights | Level 3 | Mortgage-backed Securities Non-agency | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 79 79
Asset-backed | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 2,309 2,297
Asset-backed | Level 1 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Asset-backed | Level 2 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 2,225 2,210
Asset-backed | Level 3 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 84 87
Other | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 2,440 2,106
Other | Level 1 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 0 0
Other | Level 2 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 2,385 2,051
Other | Level 3 | Fair Value, Recurring    
Assets    
Investment securities – available-for-sale 55 55
Residential mortgage servicing rights | Fair Value, Recurring    
Assets    
Mortgage servicing rights 2,786 2,638
Residential mortgage servicing rights | Level 1 | Fair Value, Recurring    
Assets    
Mortgage servicing rights 0 0
Residential mortgage servicing rights | Level 2 | Fair Value, Recurring    
Assets    
Mortgage servicing rights 0 0
Residential mortgage servicing rights | Level 3 | Fair Value, Recurring    
Assets    
Mortgage servicing rights 2,786 2,638
Commercial mortgage servicing rights | Fair Value, Recurring    
Assets    
Mortgage servicing rights 1,030 1,021
Commercial mortgage servicing rights | Level 1 | Fair Value, Recurring    
Assets    
Mortgage servicing rights 0 0
Commercial mortgage servicing rights | Level 2 | Fair Value, Recurring    
Assets    
Mortgage servicing rights 0 0
Commercial mortgage servicing rights | Level 3 | Fair Value, Recurring    
Assets    
Mortgage servicing rights $ 1,030 $ 1,021