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MORTGAGE BANKING AND OTHER SERVICED LOANS - Changes Related to MSRs - Fair Value Method (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
MSRs
Fair value as of beginning of the period			$ 1,491
Fair value at end of the period	$ 1,426		1,426
Residential mortgages
MSRs
Fair value as of beginning of the period	1,397	$ 1,564	1,491	$ 1,552
Amounts capitalized	48	25	75	43
Sales	0	0	(72)	0
Changes in unpaid principal balance	(40)	(43)	(79)	(89)
Changes in fair value	21	22	11	62
Fair value at end of the period	1,426	$ 1,568	1,426	$ 1,568
MSR loans	95,400		95,400		$ 95,600
Federal Home Loan Mortgage Corporation (FHLMC)
MSRs
MSR loans	$ 10,500		$ 10,500

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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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