REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS - Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Deferred policy acquisition costs	$ 3,816	$ 4,222	$ 4,959	$ 4,443
Amounts due from reinsurers	3,053	3,002
Guaranteed minimum income benefit reinsurance asset, at fair value	2,859	2,466
Current and deferred income taxes	0	249
Other assets	3,078	3,050
Total Assets	251,294	227,952
LIABILITIES
Future policy benefits and other policyholders' liabilities	40,151	33,979
Other liabilities	1,580	1,769
Total Liabilities	239,610	216,348
Equity:
Retained earnings	(795)	2,145
Accumulated other comprehensive income (loss)	4,595	1,596	(501)
Total equity attributable to Equitable Financial	11,643	11,552
Total Equity	11,643	11,565	12,359	$ 19,395
Total Liabilities, Redeemable Noncontrolling Interest and Equity	$ 251,294	227,952
As Previously Reported
ASSETS
Deferred policy acquisition costs		4,337
Amounts due from reinsurers		3,001
Guaranteed minimum income benefit reinsurance asset, at fair value		2,466
Current and deferred income taxes		224
Other assets		3,050
Total Assets		228,041
LIABILITIES
Future policy benefits and other policyholders' liabilities		33,976
Other liabilities		1,768
Total Liabilities		216,344
Equity:
Retained earnings		2,242
Accumulated other comprehensive income (loss)		1,592
Total equity attributable to Equitable Financial		11,645
Total Equity		11,658	12,428
Total Liabilities, Redeemable Noncontrolling Interest and Equity		228,041
Impact of Revisions
ASSETS
Deferred policy acquisition costs		(115)
Amounts due from reinsurers		1
Guaranteed minimum income benefit reinsurance asset, at fair value		0
Current and deferred income taxes		25
Other assets		0
Total Assets		(89)
LIABILITIES
Future policy benefits and other policyholders' liabilities		3
Other liabilities		1
Total Liabilities		4
Equity:
Retained earnings		(97)
Accumulated other comprehensive income (loss)		4
Total equity attributable to Equitable Financial		(93)
Total Equity		(93)	$ (69)
Total Liabilities, Redeemable Noncontrolling Interest and Equity		$ (89)