Collateralized Agreements and Financings - Schedule of Gross Carrying Value of Repurchase Agreements and Securities Loaned by Class of Collateral Pledged (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Offsetting Liabilities [Line Items]
Repurchase agreements	$ 251,222	$ 294,905
Securities loaned	45,402	57,931
Money market instruments
Offsetting Liabilities [Line Items]
Repurchase agreements	1,132	328
Securities loaned	0	14
U.S. government and agency obligations
Offsetting Liabilities [Line Items]
Repurchase agreements	134,142	132,049
Securities loaned	443	503
Non-U.S. government and agency obligations
Offsetting Liabilities [Line Items]
Repurchase agreements	89,464	126,397
Securities loaned	958	1,254
Securities backed by commercial real estate
Offsetting Liabilities [Line Items]
Repurchase agreements	211	362
Securities loaned	30	0
Securities backed by residential real estate
Offsetting Liabilities [Line Items]
Repurchase agreements	278	919
Securities loaned	0	0
Corporate debt securities
Offsetting Liabilities [Line Items]
Repurchase agreements	15,370	11,034
Securities loaned	428	510
State and municipal obligations
Offsetting Liabilities [Line Items]
Repurchase agreements	50	248
Securities loaned	0	0
Other debt obligations
Offsetting Liabilities [Line Items]
Repurchase agreements	104	374
Securities loaned	25	0
Equity securities
Offsetting Liabilities [Line Items]
Repurchase agreements	10,471	23,194
Securities loaned	$ 43,518	$ 55,650

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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 https://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 https://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 https://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 https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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