RELATED PARTY TRANSACTIONS - Revenues and Expenses Transactions (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AXA Affiliates
Related Party Transaction [Line Items]
Revenue received or accrued for:		$ 460	$ 463
Expenses paid or accrued for:		81	111
AXA Affiliates \| General services provided to affiliates
Related Party Transaction [Line Items]
Revenue received or accrued for:		460	463
AXA Affiliates \| General services provided to affiliates
Related Party Transaction [Line Items]
Expenses paid or accrued for:		76	109
AXA Affiliates \| Investment management services provided by AXA IM, AXA REIM and AXA Rosenberg
Related Party Transaction [Line Items]
Expenses paid or accrued for:		5	2
Equitable Affiliates
Related Party Transaction [Line Items]
Revenue received or accrued for:	$ 762	708	771
Expenses paid or accrued for:	625	573	613
Equitable Affiliates \| Investment management and administrative services provided to EQAT, EQ Premier VIP Trust, 1290 Funds and Other AXA Trusts
Related Party Transaction [Line Items]
Revenue received or accrued for:	724	669	727
Equitable Affiliates \| Amounts received or accrued for commissions and fees earned for sale of Equitable America’s insurance products
Related Party Transaction [Line Items]
Revenue received or accrued for:	38	39	44
Equitable Affiliates \| Paid or accrued commission and fee expenses for sale of insurance products by Equitable Network
Related Party Transaction [Line Items]
Expenses paid or accrued for:	$ 625	$ 573	$ 613

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI http://asc.fasb.org/extlink&oid=120401555&loc=SL114874292-224272

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

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