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Mortgage Servicing Assets - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Agency commercial mortgage-backed securities
Servicing Assets at Fair Value [Line Items]
Contractual fee income	$ 314	$ 292	$ 264
Amortization of mortgage servicing rights	123	125	120
Agency residential mortgage-backed securities
Servicing Assets at Fair Value [Line Items]
Contractual fee income	38	35	42
Amortization of mortgage servicing rights	$ 9	$ 11	$ 18

X

- Definition

Fees and commissions, mortgage banking and servicing before amortization.

+ References

No definition available.

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- Definition

The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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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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