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v3.26.1

Relationship with BLG and Bayview Financial (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Revenue from contract with customer | $ 442,000,000 | $ 417,000,000 | $ 860,000,000 | $ 814,000,000 |
Deposits | 168,885,000,000 |  | 168,885,000,000 |  | $ 166,909,000,000
Bayview Financial |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Deposits | $ 4,700,000,000 |  | $ 4,700,000,000 |  | 3,500,000,000
Bayview Lending Group |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership percentage (as a percent) | 20.00% |  | 20.00% |  |
Equity method investments | $ 0 |  | $ 0 |  |
Bayview Lending Group | Income Statement Location: us-gaap:NoninterestIncomeOtherOperatingIncome |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Income from equity method investments | 47,000,000 | 0 | 80,000,000 | 0 |
Bayview Lending Group and Bayview Financial |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Outstanding principal balances of mortgage servicing rights | 819,000,000 |  | 819,000,000 |  | 875,000,000
Bayview Financial |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Outstanding principal balances of residential mortgage loans from Bayview Financial | 183,600,000,000 |  | 183,600,000,000 |  | 156,900,000,000
Revenues from sub-servicing | 68,000,000 | $ 56,000,000 | 131,000,000 | $ 97,000,000 |
Investment securities in held-to-maturity portfolio securitized by Bayview Financial | 28,000,000 |  | 28,000,000 |  | 32,000,000
Commitments to extend credit | 929,000,000 |  | 929,000,000 |  |
Outstanding balance | $ 764,000,000 |  | $ 764,000,000 |  | $ 635,000,000

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