GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Definite-lived Intangible Assets
Pre-tax impairment charges for goodwill	$ 0	$ 0	$ 0
Other indefinite-lived intangible assets	140,000,000	136,000,000
Impairment of other indefinite-lived assets	0	0	0
Increase in other indefinite-lived intangible assets	5,000,000		7,000,000
Carrying value of definite-lived intangible assets	47,000,000	18,000,000
Accumulated amortization	10,000,000	16,000,000
Amortization expense related to the definite-lived intangible assets	4,000,000	$ 4,000,000	6,000,000
Increase in definite-lived intangible assets	26,000,000		$ 17,000,000
Amortization expense related to the definite-lived intangible assets, 2018	6,000,000
Amortization expense related to the definite-lived intangible assets, 2019	5,000,000
Amortization expense related to the definite-lived intangible assets, 2020	5,000,000
Amortization expense related to the definite-lived intangible assets, 2021	5,000,000
Amortization expense related to the definite-lived intangible assets, 2022	$ 5,000,000
Weighted average
Definite-lived Intangible Assets
Weighted average amortization period	12 years	10 years