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Fair Value (Recurring Basis Summary) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Assets |  |
Securities available for sale | $ 44,159 | $ 131,536
Mortgage servicing rights | 3,423 | 1,818
Financial derivatives | $ 1,531 | $ 3,620
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other | Other
Liabilities |  |
Financial derivatives | $ 4,524 | $ 985
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Accrued expenses and other liabilities | Accrued expenses and other liabilities
Level 3 assets | Assets, Total | Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Concentration risk, percentage | 12.00% | 4.00%
Level 3 assets | Assets | Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Concentration risk, percentage | 1.00% |
Liabilities at fair value | Liabilities, Total | Liabilities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Concentration risk, percentage | 2.00% | 1.00%
Level 3 liabilities | Liabilities, Total | Liabilities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Concentration risk, percentage | 4.00% | 10.00%
Level 3 liabilities | Liabilities | Liabilities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Concentration risk, percentage | 1.00% | 1.00%
Assets at fair value | Assets, Total | Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Concentration risk, percentage | 11.00% | 26.00%
Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | $ 44,159 | $ 131,536
Loans | 1,310 | 1,501
Equity investments | 3,147 | 3,231
Trading securities | 1,966 | 1,851
Financial derivatives | 3,768 | 5,152
Other assets | 432 | 518
Total Assets | 59,135 | 147,484
Liabilities |  |
Other borrowed funds | 1,466 | 773
Financial derivatives | 7,618 | 3,570
Other liabilities | 294 | 175
Total liabilities | 9,378 | 4,518
Residential Mortgages | Fair Value, Measurements, Recurring |  |
Assets |  |
Loans held for sale | 654 | 1,302
Mortgage servicing rights | 2,310 | 1,078
Commercial Mortgages | Fair Value, Measurements, Recurring |  |
Assets |  |
Loans held for sale | 276 | 575
Mortgage servicing rights | 1,113 | 740
U.S. Treasury and government agencies | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 8,370 | 46,164
Residential mortgage-backed Securities | Mortgage-backed Securities Agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 28,823 | 67,632
Residential mortgage-backed Securities | Mortgage-backed Securities Non-agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 819 | 1,158
Commercial Mortgage Backed Securities | Mortgage-backed Securities Agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 1,675 | 1,773
Commercial Mortgage Backed Securities | Mortgage-backed Securities Non-agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 1,256 | 3,436
Asset-backed | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 129 | 6,409
Other | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 3,087 | 4,964
Level 1 | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 8,108 | 41,873
Equity investments | 1,173 | 1,373
Trading securities | 798 | 250
Financial derivatives | 16 | 5
Other assets | 352 | 404
Total Assets | 10,447 | 43,905
Liabilities |  |
Other borrowed funds | 1,230 | 725
Financial derivatives | 4 |
Total liabilities | 1,234 | 725
Level 1 | U.S. Treasury and government agencies | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 8,108 | 41,873
Level 2 | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 35,050 | 88,331
Loans | 541 | 617
Trading securities | 1,168 | 1,601
Financial derivatives | 3,747 | 5,109
Other assets | 80 | 114
Total Assets | 41,240 | 97,519
Liabilities |  |
Other borrowed funds | 232 | 45
Financial derivatives | 7,491 | 3,285
Total liabilities | 7,723 | 3,330
Level 2 | Residential Mortgages | Fair Value, Measurements, Recurring |  |
Assets |  |
Loans held for sale | 411 | 1,221
Level 2 | Commercial Mortgages | Fair Value, Measurements, Recurring |  |
Assets |  |
Loans held for sale | 243 | 526
Level 2 | U.S. Treasury and government agencies | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 262 | 4,291
Level 2 | Residential mortgage-backed Securities | Mortgage-backed Securities Agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 28,823 | 67,632
Level 2 | Residential mortgage-backed Securities | Mortgage-backed Securities Non-agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale |  | 61
Level 2 | Commercial Mortgage Backed Securities | Mortgage-backed Securities Agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 1,675 | 1,773
Level 2 | Commercial Mortgage Backed Securities | Mortgage-backed Securities Non-agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 1,253 | 3,433
Level 2 | Asset-backed | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 5 | 6,246
Level 2 | Other | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 3,032 | 4,895
Level 3 | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 1,001 | 1,332
Loans | 769 | 884
Equity investments | 1,778 | 1,680
Financial derivatives | 5 | 38
Total Assets | 7,252 | 5,882
Liabilities |  |
Other borrowed funds | 4 | 3
Financial derivatives | 123 | 285
Other liabilities | 294 | 175
Total liabilities | 421 | 463
Level 3 | Residential Mortgages | Fair Value, Measurements, Recurring |  |
Assets |  |
Loans held for sale | 243 | 81
Mortgage servicing rights | 2,310 | 1,078
Level 3 | Commercial Mortgages | Fair Value, Measurements, Recurring |  |
Assets |  |
Loans held for sale | 33 | 49
Mortgage servicing rights | 1,113 | 740
Level 3 | Residential mortgage-backed Securities | Mortgage-backed Securities Non-agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 819 | 1,097
Level 3 | Commercial Mortgage Backed Securities | Mortgage-backed Securities Non-agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 3 | 3
Level 3 | Asset-backed | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | 124 | 163
Level 3 | Other | Fair Value, Measurements, Recurring |  |
Assets |  |
Securities available for sale | $ 55 | $ 69

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