Financial Instruments - Fair Value Measurement Inputs and Valuation Techniques (Details)	Dec. 31, 2023	Dec. 31, 2022
IRLCs | Pull-through rate | Market pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.877	0.910
IRLCs | Pull-through rate | Market pricing | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.672	0.620
IRLCs | Pull-through rate | Market pricing | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	1.000	1.000
MSRs | Prepayment speed | Valuation Technique, Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.068	0.066
MSRs | Prepayment speed | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.060	0.060
MSRs | Prepayment speed | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.190	0.144
MSRs | Default rates | Valuation Technique, Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.002	0.001
MSRs | Default rates | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.001	0.000
MSRs | Default rates | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.012	0.005
MSRs | Discount rate | Valuation Technique, Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.102	0.096
MSRs | Discount rate | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.100	0.095
MSRs | Discount rate | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input	0.170	0.124