EARNINGS PER SHARE - Schedule of Earnings per Share (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income (Numerator)
Net (loss) income	$ (49)	$ 65	$ 18	$ 138
Net income attributable to the redeemable noncontrolling interests	(11)	0	(11)	0
Net income attributable to the noncontrolling interests	0	(1)	(3)	(3)
Numerator for basic and diluted earnings per common share available to common shareholders	$ (60)	$ 64	$ 4	$ 135
Shares (Denominator)
Weighted average common shares outstanding (shares)	92,086	102,083	92,050	102,069
Dilutive effect of stock-settled appreciation rights and outstanding stock options (shares)	1,349	706	1,221	829
Weighted average common and common equivalent shares outstanding (shares)	93,435	102,789	93,271	102,898