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Fair Value (Reconciliation of Recurring Fair Value Measurements) (Details) - Fair Value, Recurring - Level 3 - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | $ 5,882 | $ 5,137
Included in Earnings | 412 | 497
Included in other comprehensive income | (28) | 19
Purchases | 165 | 249
Sales | (20) | (46)
Issuances | 42 | 31
Settlements | (237) | (271)
Transfers into Level 3 | 5 | 3
Transfers out of Level 3 | (8) | (8)
Ending Balance | 6,213 | 5,611
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 421 | 487
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 463 | 318
Included in Earnings | 12 | 21
Sales | 3 | 2
Issuances | 73 | 31
Settlements | (156) | (70)
Ending Balance | 395 | 302
Unrealized gains/losses on liabilities held on Consolidated Balance Sheet | 14 | (26)
Fair Value Additional Information [Abstract] |  |
Net gains (losses) included in earnings (realized and unrealized) relating to Level 3 assets and liabilities | 400 | 476
Net unrealized gains (losses) relating to Level 3 assets and liabilities | 407 | 513
Loans held for sale | Residential mortgage loans held for sale |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 81 | 163
Included in Earnings | (1) | 1
Purchases | 37 | 35
Sales | (2) | (16)
Settlements | (5) | (16)
Transfers into Level 3 | 5 | 3
Transfers out of Level 3 | (7) | (5)
Ending Balance | 108 | 165
Unrealized gains/losses on assets held on Consolidated Balance Sheet | (1) |
Loans held for sale | Commercial mortgage loans held for sale |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 49 | 57
Included in Earnings | (4) | (1)
Ending Balance | 45 | 56
Unrealized gains/losses on assets held on Consolidated Balance Sheet | (3) |
Securities available for sale |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 1,332 | 1,647
Included in Earnings | 8 | 10
Included in other comprehensive income | (28) | 19
Purchases | 1 | 1
Sales |  |
Settlements | (73) | (84)
Ending Balance | 1,240 | 1,593
Securities available for sale | Residential mortgage-backed |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 1,097 | 1,365
Included in Earnings | 8 | 9
Included in other comprehensive income | (23) | 16
Settlements | (63) | (74)
Ending Balance | 1,019 | 1,316
Securities available for sale | Commercial mortgage-backed |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 3 | 11
Ending Balance | 3 | 11
Securities available for sale | Asset-backed |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 163 | 199
Included in Earnings |  | 1
Included in other comprehensive income | (4) | 3
Settlements | (7) | (9)
Ending Balance | 152 | 194
Securities available for sale | Other |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 69 | 72
Included in other comprehensive income | (1) |
Purchases | 1 | 1
Settlements | (3) | (1)
Ending Balance | 66 | 72
Loans |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 884 | 647
Included in Earnings | 11 | 10
Purchases | 13 | 88
Sales | (7) | (3)
Settlements | (49) | (28)
Transfers out of Level 3 | (1) | (3)
Ending Balance | 851 | 711
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 11 | 11
Equity investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 1,680 | 1,263
Included in Earnings | 53 | 67
Purchases | 29 | 40
Sales | (11) | (27)
Ending Balance | 1,751 | 1,343
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 53 | 63
Mortgage Servicing Rights | Residential mortgage loans held for sale |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 1,078 | 673
Included in Earnings | 207 | 295
Purchases | 76 | 71
Issuances | 21 | 13
Settlements | (60) | (73)
Ending Balance | 1,322 | 979
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 208 | 295
Mortgage Servicing Rights | Commercial mortgage loans held for sale |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 740 | 569
Included in Earnings | 151 | 129
Purchases | 8 | 13
Issuances | 21 | 18
Settlements | (34) | (28)
Ending Balance | 886 | 701
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 151 | 129
Financial derivatives |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 38 | 118
Included in Earnings | (13) | (14)
Purchases | 1 | 1
Settlements | (16) | (42)
Ending Balance | 10 | 63
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 2 | (11)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 285 | 273
Included in Earnings | 5 | (14)
Sales | 3 | 2
Settlements | (59) | (34)
Ending Balance | 234 | 227
Unrealized gains/losses on liabilities held on Consolidated Balance Sheet | 8 | (30)
Other borrowed funds |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 3 | 2
Issuances | 2 | 1
Settlements | (2) | (1)
Ending Balance | 3 | 2
Other liabilities |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning Balance | 175 | 43
Included in Earnings | 7 | 35
Issuances | 71 | 30
Settlements | (95) | (35)
Ending Balance | 158 | 73
Unrealized gains/losses on liabilities held on Consolidated Balance Sheet | $ 6 | $ 4

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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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