Represents the amount of transfers of assets measured on a recurring basis into level 2 from level 3.

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

Represents the fair value of financial instruments that are valued using broker quotes.

+ References

No definition available.

+ Details

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Balance Type:	debit
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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.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fair value of firm holdings in securities classified as other. Includes pledged and unpledged holdings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969

+ Details

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Period Type:	instant

- Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
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- Details

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FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Determination of fair values
Financial instruments owned, other	$ 112		$ 112		$ 90
Securities transferred into Level 3	59	$ 31	199	$ 115
Securities transferred into Level 2 from Level 3	19		17	$ 1
Level 3
Determination of fair values
Financial instruments valued in broker quotes	206		206		116
Other asset-backed securities \| Level 3
Determination of fair values
Financial instruments valued in broker quotes	148		148		88
Equity securities \| Level 3
Determination of fair values
Financial instruments valued in broker quotes	46		46		11
Corporate securities \| Level 3
Determination of fair values
Financial instruments valued in broker quotes	$ 12		$ 12		$ 17