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Loan Servicing - Residential MSR Sensitivity (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2026 | Dec. 31, 2025
Residential MSRs |  |
Servicing Assets at Fair Value [Line Items] |  |
Composition of loans serviced for others | 100.00% | 100.00%
Residential MSRs | Minimum |  |
Servicing Assets at Fair Value [Line Items] |  |
Prepayment speed | 6.20% | 6.10%
OAS | 1.30% | 1.40%
Residential MSRs | Maximum |  |
Servicing Assets at Fair Value [Line Items] |  |
Prepayment speed | 11.00% | 13.90%
OAS | 12.10% | 12.20%
Residential MSRs | Weighted Average |  |
Servicing Assets at Fair Value [Line Items] |  |
Prepayment speed | 7.20% | 7.20%
Effect on fair value of a 10% increase | $ (114) | $ (107)
Effect on fair value of a 20% increase | $ (221) | $ (208)
OAS | 4.00% | 4.40%
Effect on fair value of a 10% increase | $ (72) | $ (75)
Effect on fair value of a 20% increase | $ (142) | $ (146)
Weighted average life | 7 years 6 months | 7 years 7 months 6 days
Fixed-rate residential mortgage loans |  |
Servicing Assets at Fair Value [Line Items] |  |
Composition of loans serviced for others | 99.60% | 99.70%
Adjustable-rate residential mortgage loans |  |
Servicing Assets at Fair Value [Line Items] |  |
Composition of loans serviced for others | 0.40% | 0.30%

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- Definition Composition Of Mortgage Loans Serviced For Others + References No definition available. + Details
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- Definition Weighted-average life of securitized asset regardless of when transfer occurred, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- Definition Estimated rate of prepayment of principal on financial assets regardless of when the transfer occurred. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- Definition The hypothetical financial impact of a 10 percent adverse change of prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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