Collateralized Agreements and Financings - Schedule of Repurchase Agreements and Securities Loaned (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Offsetting Liabilities [Line Items]
Repurchase agreements	$ 224,328	$ 185,047
Securities loaned	27,054	$ 19,591
No Stated Maturity and Overnight [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	117,623
Securities loaned	18,533
2 - 30 Days [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	66,570
Securities loaned	3,781
31 - 90 Days [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	17,479
Securities loaned	21
91 Days - 1 Year [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	20,339
Securities loaned	4,719
Greater than 1 Year [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	$ 2,317

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Amount, before effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313

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Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

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