SHARE-BASED COMPENSATION PROGRAMS - Stock Option Activity (Details) - 12 months ended Dec. 31, 2021 € / shares in Units, $ / shares in Units, € in Thousands, shares in Thousands, $ in Thousands	USD ($) $ / shares shares	USD ($) € / shares $ / shares shares	EUR (€) € / shares shares
EQH Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options, Number Outstanding, Beginning Balance (in shares)	2,819	2,819
Options granted (in shares)	0	0
Options exercised (in shares)	(1,005)	(1,005)
Options forfeited, net (in shares)	(150)	(150)
Options expired/reinstated (in shares)	0	0
Options, Number Outstanding, Ending Balance (in shares)	1,664	1,664
Weighted Average Exercise Price
Options, Weighted Average Exercise Price, Beginning Balance (in dollars/euros per share) | $ / shares	$ 21.12
Options granted, Weighted Average Exercise Price (in dollars/euros per share) | $ / shares	12.26
Options exercised, Weighted Average Exercise Price (in dollars/euros per share) | $ / shares	20.51
Options forfeited, net, Weighted Average Exercise Price (in dollars/euros per share) | $ / shares	21.88
Options expired/reinstated, Weighted Average Exercise Price (in dollars/euros per share) | $ / shares	0
Options, Weighted Average Exercise Price, Ending Balance (in dollars/euros per share) | $ / shares	$ 21.66
Options Outstanding, Aggregate Intrinsic Value | $	$ 5,186	$ 5,186
Weighted average remaining contractual term (in years)	7 years 8 months 12 days	7 years 8 months 12 days
Options Exercisable (in shares)	690	690	690
Options Exercisable, Weighted Average Exercise Price (in dollars/euros per share) | $ / shares	$ 0	$ 0
Options Exercisable, Aggregate intrinsic value | $	$ 2,227	$ 2,227
Weighted average remaining contractual term (in years)	7 years 6 months 18 days	7 years 6 months 18 days
AXA Ordinary Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options, Number Outstanding, Beginning Balance (in shares)	1,417	1,417
Options granted (in shares)	0	0
Options exercised (in shares)	(601)	(601)
Options forfeited, net (in shares)	(86)	(86)
Options expired/reinstated (in shares)	0	0
Options, Number Outstanding, Ending Balance (in shares)	730	730
Weighted Average Exercise Price
Options, Weighted Average Exercise Price, Beginning Balance (in dollars/euros per share) | € / shares		$ 20.09
Options granted, Weighted Average Exercise Price (in dollars/euros per share) | € / shares		0
Options exercised, Weighted Average Exercise Price (in dollars/euros per share) | € / shares		19.50
Options forfeited, net, Weighted Average Exercise Price (in dollars/euros per share) | € / shares		22.59
Options expired/reinstated, Weighted Average Exercise Price (in dollars/euros per share) | € / shares		0
Options, Weighted Average Exercise Price, Ending Balance (in dollars/euros per share) | € / shares		$ 22.44
Options Outstanding, Aggregate Intrinsic Value | €			€ (2,011)
Weighted average remaining contractual term (in years)	4 years 8 months 8 days	4 years 8 months 8 days
Options Exercisable (in shares)	633	633	633
Options Exercisable, Weighted Average Exercise Price (in dollars/euros per share) | € / shares			€ 22.44
Options Exercisable, Aggregate intrinsic value | €			€ (1,744)
Weighted average remaining contractual term (in years)	4 years 6 months 7 days	4 years 6 months 7 days