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Fair Value (Reconciliation of Recurring Fair Value Measurements) (Details) - Fair Value, Recurring - Level 3 - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | $ 7,142 | $ 6,213 | $ 7,252 | $ 5,882
Included in Earnings | 199 | 390 | 308 | 802
Included in other comprehensive income | 13 | (53) |  | (81)
Purchases | 211 | 304 | 393 | 469
Sales | (370) | (94) | (441) | (114)
Issuances | 24 | 31 | 42 | 73
Settlements | (228) | (232) | (425) | (469)
Transfers into Level 3 | 8 | 9 | 21 | 14
Transfers out of Level 3 | (12) | (22) | (163) | (30)
Ending Balance | 6,987 | 6,546 | 6,987 | 6,546
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 186 | 389 | 277 | 806
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 331 | 395 | 421 | 463
Included in Earnings | 110 | 32 | 173 | 44
Purchases |  |  |  |
Sales | 1 | 3 | 3 | 6
Issuances | 92 | 173 | 113 | 246
Settlements | (150) | (205) | (326) | (361)
Ending Balance | 384 | 398 | 384 | 398
Unrealized gains/losses on liabilities held on Consolidated Balance Sheet | 101 | 29 | 164 | 33
Fair Value Additional Information [Abstract] |  |  |  |
Net gains (losses) included in earnings (realized and unrealized) relating to Level 3 assets and liabilities | 89 | 358 | 135 | 758
Net unrealized gains (losses) relating to Level 3 assets and liabilities | 85 | 360 | 113 | 773
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 | 242 | 108 | 243 | 81
Included in Earnings | (4) | (1) |  | (2)
Purchases | 3 | 8 | 9 | 45
Sales | (41) | (30) | (42) | (32)
Settlements | (2) | (4) | (7) | (9)
Transfers into Level 3 |  | 9 | 3 | 14
Transfers out of Level 3 | (7) | (7) | (15) | (14)
Ending Balance | 191 | 83 | 191 | 83
Unrealized gains/losses on assets held on Consolidated Balance Sheet | (3) | (1) | 1 | (2)
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 | 32 | 45 | 33 | 49
Included in Earnings | 1 |  |  | (4)
Sales |  |  |  |
Settlements | (8) | (7) | (8) | (7)
Ending Balance | 25 | 38 | 25 | 38
Unrealized gains/losses on assets held on Consolidated Balance Sheet |  |  |  | (4)
Loans held for sale | Other consumer loans held for sale |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Sales |  |  |  |
Securities available for sale |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 964 | 1,240 | 1,001 | 1,332
Included in Earnings | 5 | 8 | 9 | 16
Included in other comprehensive income | 13 | (53) |  | (81)
Purchases | 3 | 2 | 3 | 3
Sales |  |  |  |
Settlements | (43) | (64) | (74) | (137)
Transfers into Level 3 |  |  | 3 |
Ending Balance | 942 | 1,133 | 942 | 1,133
Securities available for sale | Residential mortgage-backed |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 787 | 1,019 | 819 | 1,097
Included in Earnings | 4 | 7 | 8 | 15
Included in other comprehensive income | 14 | (43) | 4 | (66)
Settlements | (37) | (58) | (63) | (121)
Ending Balance | 768 | 925 | 768 | 925
Securities available for sale | Commercial mortgage-backed |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 3 | 3 | 3 | 3
Included in Earnings |  |  |  |
Included in other comprehensive income |  |  |  |
Ending Balance | 3 | 3 | 3 | 3
Securities available for sale | Asset-backed |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 121 | 152 | 124 | 163
Included in Earnings | 1 | 1 | 1 | 1
Included in other comprehensive income | (1) | (9) |  | (13)
Settlements | (4) | (6) | (8) | (13)
Ending Balance | 117 | 138 | 117 | 138
Securities available for sale | Other |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 53 | 66 | 55 | 69
Included in Earnings |  |  |  |
Included in other comprehensive income |  | (1) | (4) | (2)
Purchases | 3 | 2 | 3 | 3
Sales |  |  |  |
Settlements | (2) |  | (3) | (3)
Transfers into Level 3 |  |  | 3 |
Ending Balance | 54 | 67 | 54 | 67
Loans |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 757 | 851 | 769 | 884
Included in Earnings | 3 | 10 | 6 | 21
Purchases | 11 | 7 | 20 | 20
Sales | (1) | (1) | (1) | (8)
Settlements | (28) | (48) | (50) | (97)
Transfers into Level 3 | 8 |  | 15 |
Transfers out of Level 3 | (5) | (15) | (14) | (16)
Ending Balance | 745 | 804 | 745 | 804
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 3 | 9 | 6 | 21
Equity investments |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 1,835 | 1,751 | 1,778 | 1,680
Included in Earnings | 24 | 92 | 145 | 145
Purchases | 92 | 87 | 232 | 116
Sales | (328) | (63) | (398) | (74)
Transfers out of Level 3 |  |  | (134) |
Ending Balance | 1,623 | 1,867 | 1,623 | 1,867
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 2 | 94 | 119 | 146
Mortgage Servicing Rights | Residential mortgage loans held for sale |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 2,232 | 1,322 | 2,310 | 1,078
Included in Earnings | 81 | 163 | 33 | 370
Purchases | 91 | 181 | 109 | 257
Issuances | 5 | 17 | 10 | 38
Settlements | (60) | (63) | (113) | (123)
Ending Balance | 2,349 | 1,620 | 2,349 | 1,620
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 80 | 163 | 33 | 371
Mortgage Servicing Rights | Commercial mortgage loans held for sale |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 1,061 | 886 | 1,113 | 740
Included in Earnings | 99 | 111 | 108 | 262
Purchases | 9 | 17 | 17 | 25
Issuances | 19 | 14 | 32 | 35
Settlements | (82) | (40) | (164) | (74)
Ending Balance | 1,106 | 988 | 1,106 | 988
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 100 | 111 | 108 | 262
Financial derivatives |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 19 | 10 | 5 | 38
Included in Earnings | (10) | 7 | 7 | (6)
Purchases | 2 | 2 | 3 | 3
Settlements | (5) | (6) | (9) | (22)
Ending Balance | 6 | 13 | 6 | 13
Unrealized gains/losses on assets held on Consolidated Balance Sheet | 4 | 13 | 10 | 12
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 97 | 234 | 123 | 285
Included in Earnings | 79 | 18 | 118 | 23
Sales | 1 | 3 | 3 | 6
Settlements | (37) | (42) | (104) | (101)
Ending Balance | 140 | 213 | 140 | 213
Unrealized gains/losses on liabilities held on Consolidated Balance Sheet | 80 | 19 | 122 | 18
Other borrowed funds |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 5 | 3 | 4 | 3
Issuances | 3 | 2 | 6 | 4
Settlements | (3) | (2) | (5) | (4)
Ending Balance | 5 | 3 | 5 | 3
Other liabilities |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 229 | 158 | 294 | 175
Included in Earnings | 31 | 14 | 55 | 21
Purchases |  |  |  |
Issuances | 89 | 171 | 107 | 242
Settlements | (110) | (161) | (217) | (256)
Ending Balance | 239 | 182 | 239 | 182
Unrealized gains/losses on liabilities held on Consolidated Balance Sheet | $ 21 | $ 10 | $ 42 | $ 15

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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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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 -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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