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Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Assets |  |
Investment securities – available for sale | $ 125,058 | $ 87,358
Mortgage servicing rights | 1,793 | 1,242
Financial derivatives | 4,669 | 4,379
Liabilities |  |
Financial derivatives | $ 722 | $ 584
Assets At Fair Value | Assets, Total | Assets |  |
Liabilities |  |
Concentration risk, percentage | 26.00% | 22.00%
Level 3 Assets | Assets, Total | Assets |  |
Liabilities |  |
Concentration risk, percentage | 4.00% | 5.00%
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% | 1.00%
Level Three Liabilities | Liabilities, Total | Liability |  |
Liabilities |  |
Concentration risk, percentage | 7.00% | 9.00%
Level Three Liabilities | Liability | Liability |  |
Liabilities |  |
Concentration risk, percentage | 1.00% | 1.00%
Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | $ 125,058 | $ 87,358
Loans | 1,727 | 1,365
Equity investments | 2,697 | 2,629
Trading securities | 1,829 | 2,238
Financial derivatives | 6,447 | 6,533
Other assets | 554 | 454
Total Assets | 142,065 | 103,035
Liabilities |  |
Other borrowed funds | 810 | 707
Financial derivatives | 3,719 | 2,756
Other liabilities | 124 | 43
Total liabilities | 4,653 | 3,506
Level 1 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 34,627 | 16,675
Equity investments | 922 | 1,070
Trading securities | 621 | 548
Financial derivatives | 3 |
Other assets | 450 | 373
Total Assets | 36,623 | 18,666
Liabilities |  |
Other borrowed funds | 732 | 661
Total liabilities | 732 | 661
Level 2 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 88,935 | 69,036
Loans | 748 | 718
Trading securities | 1,208 | 1,690
Financial derivatives | 6,357 | 6,415
Other assets | 104 | 81
Total Assets | 98,902 | 78,936
Liabilities |  |
Other borrowed funds | 76 | 44
Financial derivatives | 3,519 | 2,483
Total liabilities | 3,595 | 2,527
Level 3 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 1,496 | 1,647
Loans | 979 | 647
Equity investments | 1,540 | 1,263
Financial derivatives | 87 | 118
Total Assets | 6,305 | 5,137
Liabilities |  |
Other borrowed funds | 2 | 2
Financial derivatives | 200 | 273
Other liabilities | 124 | 43
Total liabilities | 326 | 318
Residential mortgage loans held for sale | Fair Value, Recurring |  |
Assets |  |
Loans held for sale | 1,504 | 854
Residential mortgage loans held for sale | Level 2 | Fair Value, Recurring |  |
Assets |  |
Loans held for sale | 1,385 | 691
Residential mortgage loans held for sale | Level 3 | Fair Value, Recurring |  |
Assets |  |
Loans held for sale | 119 | 163
Commercial mortgage loans held for sale | Fair Value, Recurring |  |
Assets |  |
Loans held for sale | 217 | 362
Commercial mortgage loans held for sale | Level 2 | Fair Value, Recurring |  |
Assets |  |
Loans held for sale | 165 | 305
Commercial mortgage loans held for sale | Level 3 | Fair Value, Recurring |  |
Assets |  |
Loans held for sale | 52 | 57
Other consumer loans held for sale | Fair Value, Recurring |  |
Assets |  |
Loans held for sale | 239 |
Other consumer loans held for sale | Level 3 | Fair Value, Recurring |  |
Assets |  |
Loans held for sale | 239 |
U.S. Treasury and government agencies | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 39,011 | 20,711
U.S. Treasury and government agencies | Level 1 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 34,627 | 16,675
U.S. Treasury and government agencies | Level 2 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 4,384 | 4,036
Residential mortgage-backed | Mortgage-backed Securities Agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 67,314 | 48,911
Residential mortgage-backed | Mortgage-backed Securities Non-agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 1,323 | 1,501
Residential mortgage-backed | Level 2 | Mortgage-backed Securities Agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 67,314 | 48,911
Residential mortgage-backed | Level 2 | Mortgage-backed Securities Non-agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 86 | 136
Residential mortgage-backed | Level 3 | Mortgage-backed Securities Non-agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 1,237 | 1,365
Commercial mortgage-backed | Mortgage-backed Securities Agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 2,331 | 2,688
Commercial mortgage-backed | Mortgage-backed Securities Non-agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 4,079 | 3,689
Commercial mortgage-backed | Level 2 | Mortgage-backed Securities Agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 2,331 | 2,688
Commercial mortgage-backed | Level 2 | Mortgage-backed Securities Non-agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 4,068 | 3,678
Commercial mortgage-backed | Level 3 | Mortgage-backed Securities Non-agency | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 11 | 11
Asset-backed | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 5,697 | 5,150
Asset-backed | Level 2 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 5,522 | 4,951
Asset-backed | Level 3 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 175 | 199
Other | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 5,303 | 4,708
Other | Level 2 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 5,230 | 4,636
Other | Level 3 | Fair Value, Recurring |  |
Assets |  |
Investment securities – available for sale | 73 | 72
Residential mortgage servicing rights | Fair Value, Recurring |  |
Assets |  |
Mortgage servicing rights | 1,111 | 673
Residential mortgage servicing rights | Level 3 | Fair Value, Recurring |  |
Assets |  |
Mortgage servicing rights | 1,111 | 673
Commercial mortgage servicing rights | Fair Value, Recurring |  |
Assets |  |
Mortgage servicing rights | 682 | 569
Commercial mortgage servicing rights | Level 3 | Fair Value, Recurring |  |
Assets |  |
Mortgage servicing rights | $ 682 | $ 569

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