Collateralized Agreements and Financings - Schedule of Repurchase Agreements and Securities Loaned (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Offsetting Liabilities [Line Items]
Repurchase agreements	$ 294,905	$ 224,328
Securities loaned	57,931	$ 27,054
No Stated Maturity and Overnight [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	97,675
Securities loaned	35,052
2 - 30 Days [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	102,440
Securities loaned	153
31 - 90 Days [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	38,297
Securities loaned	110
91 Days - 1 Year [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	41,013
Securities loaned	15,656
Greater than 1 Year [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements	15,480
Securities loaned	$ 6,960

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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://www.xbrl.org/2003/role/disclosureRef
-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

Reference 1: 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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-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

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