EARNINGS PER SHARE - Reconciliation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) attributable to common shareholders	$ 49	$ (275)	$ 138
Shares for basic earnings (loss) per share (in shares)	42,500	41,300	43,900
Basic earnings (loss) per share (in usd per share)	$ 1.15	$ (6.65)	$ 3.13
Effect of dilutive shares outstanding
Employee SARs (in shares)	200	0	300
Restricted stock units (in shares)	500	0	300
Shares for diluted earnings (loss) per share (in shares)	43,300	41,300	44,500
Diluted earnings (loss) per share (in usd per share)	$ 1.13	$ (6.65)	$ 3.09
Shares excluded from the calculation of diluted earnings per share (in shares)		400
2022 Convertible Notes
Effect of dilutive shares outstanding
Convertible Notes (in shares)	100	0	0
Performance Shares
Effect of dilutive shares outstanding
Shares excluded from the calculation of diluted earnings per share (in shares)	166		345