ORGANIZATION (Details) - segment	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Number of reportable segments	4
Number of operating segments	4
AXA Equitable
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Economic interest in subsidiary (as a percent)	28.90%	29.00%
Parent Company
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Economic interest in subsidiary (as a percent)	64.40%	64.70%