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Loans and Leases - Balances Of Commercial Loan Portfolio Classes, Disaggregated By PD Grade (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 54,859,000,000 | $ 58,232,000,000
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 31,068,000,000 | 33,104,000,000
C&I | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, originated year one | 7,421,000,000 | 9,331,000,000
Financing receivable, originated year two | 3,676,000,000 | 5,308,000,000
Financing receivable, originated year three | 3,556,000,000 | 2,812,000,000
Financing receivable, originated year four | 1,606,000,000 | 1,829,000,000
Financing receivable, originated year five | 1,253,000,000 | 1,240,000,000
Financing receivable, originated prior to year five | 2,358,000,000 | 2,267,000,000
LMC, Non-Revolving Loans | 4,518,000,000 | 5,404,000,000
Revolving loans | 6,615,000,000 | 4,793,000,000
Revolving Loans converted to term loans | 65,000,000 | 120,000,000
Loans and leases | 31,068,000,000 | 33,104,000,000
Revolving loans converted to term loan during period | 0 | 50,000,000
C&I | PD Grade 1 -12 | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, originated year one | 7,372,000,000 | 9,060,000,000
Financing receivable, originated year two | 3,576,000,000 | 5,138,000,000
Financing receivable, originated year three | 3,439,000,000 | 2,628,000,000
Financing receivable, originated year four | 1,455,000,000 | 1,748,000,000
Financing receivable, originated year five | 1,193,000,000 | 1,161,000,000
Financing receivable, originated prior to year five | 2,267,000,000 | 2,145,000,000
LMC, Non-Revolving Loans | 4,518,000,000 | 5,404,000,000
Revolving loans | 6,386,000,000 | 4,571,000,000
Revolving Loans converted to term loans | 13,000,000 | 60,000,000
Loans and leases | 30,219,000,000 | 31,915,000,000
C&I | PD Grades 13 | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, originated year one | 25,000,000 | 89,000,000
Financing receivable, originated year two | 39,000,000 | 93,000,000
Financing receivable, originated year three | 50,000,000 | 70,000,000
Financing receivable, originated year four | 48,000,000 | 31,000,000
Financing receivable, originated year five | 36,000,000 | 37,000,000
Financing receivable, originated prior to year five | 43,000,000 | 64,000,000
LMC, Non-Revolving Loans | 0 | 0
Revolving loans | 100,000,000 | 127,000,000
Revolving Loans converted to term loans | 4,000,000 | 1,000,000
Loans and leases | 345,000,000 | 512,000,000
C&I | PD Grades 14 15 16 | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, originated year one | 24,000,000 | 182,000,000
Financing receivable, originated year two | 61,000,000 | 77,000,000
Financing receivable, originated year three | 67,000,000 | 114,000,000
Financing receivable, originated year four | 103,000,000 | 50,000,000
Financing receivable, originated year five | 24,000,000 | 42,000,000
Financing receivable, originated prior to year five | 48,000,000 | 58,000,000
LMC, Non-Revolving Loans | 0 | 0
Revolving loans | 129,000,000 | 95,000,000
Revolving Loans converted to term loans | 48,000,000 | 59,000,000
Loans and leases | 504,000,000 | 677,000,000
Commercial real estate | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 12,109,000,000 | 12,275,000,000
Commercial real estate | CRE (b) | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, originated year one | 3,492,000,000 | 2,555,000,000
Financing receivable, originated year two | 2,091,000,000 | 3,348,000,000
Financing receivable, originated year three | 2,590,000,000 | 1,888,000,000
Financing receivable, originated year four | 1,057,000,000 | 1,257,000,000
Financing receivable, originated year five | 744,000,000 | 1,044,000,000
Financing receivable, originated prior to year five | 1,919,000,000 | 1,887,000,000
Revolving loans | 216,000,000 | 277,000,000
Revolving Loans converted to term loans | 0 | 19,000,000
Loans and leases | 12,109,000,000 | 12,275,000,000
Commercial real estate | PD Grade 1 -12 | CRE (b) | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, originated year one | 3,441,000,000 | 2,477,000,000
Financing receivable, originated year two | 2,065,000,000 | 3,311,000,000
Financing receivable, originated year three | 2,514,000,000 | 1,750,000,000
Financing receivable, originated year four | 929,000,000 | 1,140,000,000
Financing receivable, originated year five | 691,000,000 | 946,000,000
Financing receivable, originated prior to year five | 1,822,000,000 | 1,800,000,000
Revolving loans | 204,000,000 | 259,000,000
Revolving Loans converted to term loans | 0 | 19,000,000
Loans and leases | 11,666,000,000 | 11,702,000,000
Commercial real estate | PD Grades 13 | CRE (b) | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, originated year one | 4,000,000 | 48,000,000
Financing receivable, originated year two | 26,000,000 | 24,000,000
Financing receivable, originated year three | 52,000,000 | 117,000,000
Financing receivable, originated year four | 125,000,000 | 75,000,000
Financing receivable, originated year five | 20,000,000 | 71,000,000
Financing receivable, originated prior to year five | 65,000,000 | 54,000,000
Revolving loans | 0 | 0
Revolving Loans converted to term loans | 0 | 0
Loans and leases | 292,000,000 | 389,000,000
Commercial real estate | PD Grades 14 15 16 | CRE (b) | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, originated year one | 47,000,000 | 30,000,000
Financing receivable, originated year two | 0 | 13,000,000
Financing receivable, originated year three | 24,000,000 | 21,000,000
Financing receivable, originated year four | 3,000,000 | 42,000,000
Financing receivable, originated year five | 33,000,000 | 27,000,000
Financing receivable, originated prior to year five | 32,000,000 | 33,000,000
Revolving loans | 12,000,000 | 18,000,000
Revolving Loans converted to term loans | 0 | 0
Loans and leases | $ 151,000,000 | $ 184,000,000

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