GOODWILL AND OTHER INTANGIBLE ASSETS - Definite-lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Definite-lived Intangible Assets
Carrying value of definite-lived intangible assets	$ 18	$ 23
Accumulated amortization	16	49
Amortization expense related to the definite-lived intangible assets	4	6	$ 4
Increase in definite-lived intangible assets		$ 17
Amortization expense related to the definite-lived intangible assets, 2017	3
Amortization expense related to the definite-lived intangible assets, 2018	2
Amortization expense related to the definite-lived intangible assets, 2019	2
Amortization expense related to the definite-lived intangible assets, 2020	2
Amortization expense related to the definite-lived intangible assets, 2021	$ 2
Weighted average
Definite-lived Intangible Assets
Weighted average amortization period	10 years	10 years