Commitments, Contingencies and Guarantees - Guarantees (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derivatives
Guarantor Obligations [Line Items]
Carrying Value of Net Liability	$ 7,849	$ 3,406
Maximum Payout/Notional Amount by Period of Expiration	238,307	166,197
Carrying value of derivatives included derivative assets	682	1,100
Carrying value of derivatives included derivative liabilities	8,530	4,510
Derivatives \| Remainder of 2022
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	21,519	68,212
Derivatives \| 2023 - 2024
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	145,915	48,273
Derivatives \| 2025 - 2026
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	37,383	19,706
Derivatives \| 2027 - thereafter
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	33,490	30,006
Securities lending and clearing
Guarantor Obligations [Line Items]
Carrying Value of Net Liability	0	0
Maximum Payout/Notional Amount by Period of Expiration	14,041	11,046
Securities lending and clearing \| Remainder of 2022
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	14,041	11,046
Securities lending and clearing \| 2023 - 2024
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	0	0
Securities lending and clearing \| 2025 - 2026
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	0	0
Securities lending and clearing \| 2027 - thereafter
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	0	0
Other financial guarantees
Guarantor Obligations [Line Items]
Carrying Value of Net Liability	400	234
Maximum Payout/Notional Amount by Period of Expiration	7,053	6,591
Other financial guarantees \| Remainder of 2022
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	499	871
Other financial guarantees \| 2023 - 2024
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	3,757	3,608
Other financial guarantees \| 2025 - 2026
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	2,376	2,015
Other financial guarantees \| 2027 - thereafter
Guarantor Obligations [Line Items]
Maximum Payout/Notional Amount by Period of Expiration	$ 421	$ 97

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

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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.

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

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