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Sales of Receivables and Servicing Rights - Changes in the Servicing Assets (Details) - Residential mortgage loans - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 1,598	$ 1,704
Servicing rights originated	58	25
Changes in fair value:
Due to changes in inputs or assumptions	6	(25)
Other changes in fair value	(80)	(75)
Balance, end of period	$ 1,582	$ 1,629

X

- Definition

The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

+ References

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-Topic 860
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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase (decrease) in fair value from changes in the inputs, assumptions, or model used to calculate the fair value of the contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of increase (decrease) from changes in fair value classified as other for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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