EARNINGS PER SHARE - Reconciliation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net (loss) income attributable to common shareholders	$ (106)	$ 24
Shares for basic (loss) earnings per share (in shares)	41,500	45,600
Basic (loss) earnings per share (in usd per share)	$ (2.56)	$ 0.52
Employee stock options and SARs (in shares)	0	300
Restricted stock units (in shares)	0	200
Shares for diluted earnings per share (in shares)	41,500	46,100
Diluted (loss) earnings per share (in usd per share)	$ (2.56)	$ 0.51
Performance Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculation of diluted earnings per share (in shares)		452