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Asset Quality - Schedule of Modifications for Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 595 | $ 534 | $ 295
Percentage of Amortized Cost Basis | 0.56% | 0.51% | 0.26%
Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 9 | $ 32 | $ 2
Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 429 | 387 | 186
Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 27 | 49 | 53
Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 130 | 66 | 54
Total commercial loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 565 | $ 499 | $ 269
Percentage of Amortized Cost Basis | 0.74% | 0.69% | 0.35%
Total commercial loans | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 2 | $ 28 | $ 0
Total commercial loans | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 425 | 383 | 184
Total commercial loans | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 27 | 47 | 51
Total commercial loans | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 111 | 41 | 34
Total commercial loans | Commercial and Industrial |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 304 | $ 163 | $ 263
Percentage of Amortized Cost Basis | 0.53% | 0.31% | 0.47%
Total commercial loans | Commercial and Industrial | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 2 | $ 0 | $ 0
Total commercial loans | Commercial and Industrial | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 236 | 118 | 180
Total commercial loans | Commercial and Industrial | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 22 | 25 | 49
Total commercial loans | Commercial and Industrial | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 44 | 20 | 34
Total commercial loans | Total commercial real estate loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 261 | $ 336 | $ 6
Percentage of Amortized Cost Basis | 1.58% | 2.07% | 0.03%
Total commercial loans | Total commercial real estate loans | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 0 | $ 28 | $ 0
Total commercial loans | Total commercial real estate loans | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 189 | 265 | 4
Total commercial loans | Total commercial real estate loans | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 5 | 22 | 2
Total commercial loans | Total commercial real estate loans | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 67 | 21 | 0
Total commercial loans | Real estate — commercial mortgage |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 231 | $ 307 | $ 6
Percentage of Amortized Cost Basis | 1.69% | 2.31% | 0.04%
Total commercial loans | Real estate — commercial mortgage | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 0 | $ 28 | $ 0
Total commercial loans | Real estate — commercial mortgage | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 159 | 236 | 4
Total commercial loans | Real estate — commercial mortgage | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 5 | 22 | 2
Total commercial loans | Real estate — commercial mortgage | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 67 | 21 | 0
Total commercial loans | Real estate — construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 30 | $ 29 | $ 0
Percentage of Amortized Cost Basis | 1.05% | 0.99% | 0.00%
Total commercial loans | Real estate — construction | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 0 | $ 0 | $ 0
Total commercial loans | Real estate — construction | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 30 | 29 | 0
Total commercial loans | Real estate — construction | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 0 | 0 | 0
Total commercial loans | Real estate — construction | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 0 | 0 | 0
Total consumer loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 30 | $ 35 | $ 26
Percentage of Amortized Cost Basis | 0.10% | 0.11% | 0.07%
Total consumer loans | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 7 | $ 4 | $ 2
Total consumer loans | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 4 | 4 | 2
Total consumer loans | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 0 | 2 | 2
Total consumer loans | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 19 | 25 | 20
Total consumer loans | Real estate — residential mortgage |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 14 | $ 14 | $ 10
Percentage of Amortized Cost Basis | 0.07% | 0.07% | 0.05%
Total consumer loans | Real estate — residential mortgage | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 3 | $ 1 | $ 0
Total consumer loans | Real estate — residential mortgage | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 1 | 1 | 0
Total consumer loans | Real estate — residential mortgage | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 0 | 0 | 1
Total consumer loans | Real estate — residential mortgage | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 10 | 12 | 9
Total consumer loans | Home equity loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 9 | $ 13 | $ 9
Percentage of Amortized Cost Basis | 0.16% | 0.20% | 0.13%
Total consumer loans | Home equity loans | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 4 | $ 3 | $ 2
Total consumer loans | Home equity loans | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 1 | 1 | 1
Total consumer loans | Home equity loans | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 0 | 2 | 1
Total consumer loans | Home equity loans | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 4 | 7 | 5
Total consumer loans | Other consumer loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 4 | $ 5 | $ 3
Percentage of Amortized Cost Basis | 0.09% | 0.10% | 0.05%
Total consumer loans | Other consumer loans | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 0 | $ 0 | $ 0
Total consumer loans | Other consumer loans | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 2 | 2 | 1
Total consumer loans | Other consumer loans | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 0 | 0 | 0
Total consumer loans | Other consumer loans | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 2 | 3 | 2
Total consumer loans | Commercial credit card |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 3 | $ 3 | $ 4
Percentage of Amortized Cost Basis | 0.31% | 0.31% | 0.40%
Total consumer loans | Commercial credit card | Interest Rate Reduction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 0 | $ 0 | $ 0
Total consumer loans | Commercial credit card | Term Extension |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 0 | 0 | 0
Total consumer loans | Commercial credit card | Other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | 0 | 0 | 0
Total consumer loans | Commercial credit card | Combination |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amortized Cost Basis | $ 3 | $ 3 | $ 4

X
- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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- Definition Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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- Definition Line items represent financial concepts included in a table. 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