Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Allowance for Credit Losses - Components of the Allowance (Details) - USD ($) $ in Millions	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Abstract]
Allowance for loan losses	$ (8,513)		$ (8,364)
Other	(240)		(228)
Financing Receivable, Allowance for Credit Loss and Other, Including Accrued Interest	(8,753)	$ (8,592)	(8,592)	$ (8,471)	$ (7,722)	$ (7,886)
Single-family
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Abstract]
Allowance for loan losses	(6,117)		(6,056)
Other	(228)		(216)
Financing Receivable, Allowance for Credit Loss and Other, Including Accrued Interest	(6,345)	(6,286)	(6,272)	(5,985)	(5,356)	(5,487)
Multifamily
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Abstract]
Allowance for loan losses	(2,396)		(2,308)
Other	(12)		(12)
Financing Receivable, Allowance for Credit Loss and Other, Including Accrued Interest	$ (2,408)	$ (2,306)	$ (2,320)	$ (2,486)	$ (2,366)	$ (2,399)