Amount of securities transferred to agency re-securitization VIEs during the period.

No definition available.

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- Definition

Variable Interest Entity, Transfer of Securities [Abstract]

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=118948506&loc=d3e107314-111719

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Net carrying amount of the assets and liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), when the reporting entity is not the VIE's primary beneficiary.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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Variable Interest Entities - Re-securitizations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Transfers of securities to VIEs
U.S. GSEs and government agencies	$ 5,377	$ 2,540	$ 12,444	$ 11,321
Variable Interest Entity [Line Items]
Assets held in VIEs with continuing involvement	178,260		178,260		$ 183,040
Firm-sponsored private-label \| Nonconsolidated re-securitization VIEs
Variable Interest Entity [Line Items]
Assets held in VIEs with continuing involvement	21		21		118
Interest in VIEs	0		0		10
U.S. GSEs and government agencies \| Nonconsolidated re-securitization VIEs
Variable Interest Entity [Line Items]
Interest in VIEs	$ 2,097		$ 2,097		$ 3,058