Securitizations and Variable Interest Entities, Sold or Securitized Loans Serviced for Others (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	$ 3,075	$ 79,830
Delinquent loans and foreclosed assets	287	1,807
Net charge-offs	10	64
Conforming mortgage loan securitization [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	461,800	528,100
Delinquent loans and foreclosed assets	1,700	2,400
Total Commercial [Member] \| Commercial mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	6	72,468
Delinquent loans and foreclosed assets	0	1,467
Net charge-offs	0	54
Securitizations and Variable Interest Entities Textual [Abstract]
Foreclosed assets	0	258
Total Consumer [Member] \| Residential mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	3,069	7,362
Delinquent loans and foreclosed assets	287	340
Net charge-offs	10	10
Securitizations and Variable Interest Entities Textual [Abstract]
Foreclosed assets	$ 13	$ 18

Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

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

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- References

No definition available.

+ Details

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- Definition

Amount of credit loss after recoveries for transferred financial assets that continue to be recognized in the statement of financial position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (e)(5)
-SubTopic 20
-Topic 860
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

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- Definition

Includes off balance-sheet amounts sold or securitized for both the principal amount of loans (across all types of loans) that are overdue in payment by a set number of days, and the carrying amount of assets obtained through foreclosure proceedings.

+ References

No definition available.

+ Details

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- Definition

Amount of foreclosed assets related to loans sold or securitized for which we have ongoing involvement as servicer.

+ References

No definition available.

+ Details

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- Definition

Securitizations and Variable Interest Entities Textual Abstract.

+ References

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