Mortgage Servicing Rights (“MSRs”) - Narrative (Details) $ in Billions	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Servicing Asset at Amortized Cost [Line Items]
Unpaid principal balance, mortgage loans	$ 2.0	$ 1.8
Loans sub-serviced	$ 3.3	$ 3.1
Discount rate change
Servicing Asset at Amortized Cost [Line Items]
MSR's measurement input	0.095	0.095
Discount rate change \| Minimum
Servicing Asset at Amortized Cost [Line Items]
MSR's measurement input	0.095	0.090
Discount rate change \| Maximum
Servicing Asset at Amortized Cost [Line Items]
MSR's measurement input	0.115	0.115
Cost to service (per loan) \| Minimum
Servicing Asset at Amortized Cost [Line Items]
MSR's measurement input	70	70
Cost to service (per loan) \| Maximum
Servicing Asset at Amortized Cost [Line Items]
MSR's measurement input	85	85
Prepayment rates
Servicing Asset at Amortized Cost [Line Items]
MSR's measurement input	0.115	0.121

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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