Fair Values of Assets and Liabilities - Valuation Assumption Ranges for MSRs (Details)	Jun. 30, 2026
Minimum \| Expected prepayment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs measurement inputs	0.06
Minimum \| Option adjusted spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs measurement inputs	0.04
Maximum \| Expected prepayment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs measurement inputs	0.18
Maximum \| Option adjusted spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs measurement inputs	0.11
Weighted Average \| Expected prepayment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs measurement inputs	0.09
Weighted Average \| Option adjusted spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs measurement inputs	0.06

- 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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