Collateralized Agreements and Financings - Assets pledged as collateral (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Collateralized Agreements And Financings [Abstract]
Trading assets owned pledged in connection with repurchase agreements, securities lending agreements and other secured financings to counterparties that had the right to deliver or repledge	$ 68,208	$ 69,031
Investments pledged to counterparties that Had the right to deliver or repledge	12,840	13,375
Trading assets owned pledged in connection with repurchase agreements, securities lending agreements and other secured financings to counterparties that did not have right to deliver or repledge	102,259	99,142
Investments pledged to counterparties that did not have the right to deliver or repledge	8,683	2,331
Loans pledged to counterparties that do not have the right to deliver or repledge	6,808	8,320
Other assets (substantially all real estate and cash) owned and pledged in connection with other secured financings to counterparties that did not have the right to deliver or repledge	$ 8,878	$ 14,144

Collateralized agreements and financings.

No definition available.

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- Definition

Investments owned and pledged as collateral amount eligible to be repledged by counterparty.

+ References

No definition available.

+ Details

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- Definition

investments pledged as collateral amount not eligibleto be repledged by counterparty.

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No definition available.

+ Details

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- Definition

Loans pledged to counterparties that do not have the right to deliver or repledge

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No definition available.

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- Definition

Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions where counterparty has the right to re-pledge such.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728

+ Details

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- Definition

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

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- Definition

The carrying amount, as of the date of the latest financial statement presented, of other assets which are owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

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+ Details

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