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Loan Sale and Servicing Activities and Variable Interest Entities (Loan Sale and Servicing Activities) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Residential mortgage loans held for sale
Sales of loans and related securitization activity	$ 868	$ 884	$ 2,317	$ 2,112
Repurchases of previously transferred loans	31	30	95	71
Cash flows from servicing fees	129	138	388	415
Cash flows from servicing advances recovered/(funded), net	(1)	9	41	49
Cash flows from mortgage-backed securities held	621	969	1,813	2,789
Carrying value of mortgage backed securities held	17,100	19,000	17,100	19,000	$ 18,200
Commercial mortgage loans held for sale
Sales of loans and related securitization activity	1,354	937	2,941	1,604
Repurchases of previously transferred loans	0	0	0	9
Cash flows from servicing fees	45	53	149	152
Cash flows from servicing advances recovered/(funded), net	52	(20)	(2)	(37)
Cash flows from mortgage-backed securities held	112	32	155	133
Carrying value of mortgage backed securities held	$ 400	$ 700	$ 400	$ 700	$ 600

X

- Definition

Securities held where we transferred and/or serviced loans to a securitization special purpose entity (SPE) and we hold securities issued by that SPE.

+ References

No definition available.

+ Details

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- Definition

Cash Flows Between Transferor and Transferee, Servicing Advances Recovered (Funded)

+ References

No definition available.

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- Definition

Represents the cash flows of securities held where we transferred and/or serviced loans to a securitization special purpose entity (SPE) and we hold securities issued by that SPE.

+ References

No definition available.

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- Definition

Cash Flows between a transferor and a transferee attributable to newly transferred assets related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-3

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- Definition

Cash Flows between a transferor and a transferee attributable to purchases of previously transferred financial assets (or its underlying collateral) related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-3

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- Definition

Cash Flows between a transferee and a transferor attributable to servicing fees related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-3

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