CONSOLIDATED INTERIM STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Treasury Shares	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2018	$ 1,533			$ 1,720	$ 2	$ (189)
Beginning Balance, Shares at Dec. 31, 2018		122,499,000	468,000
Net (loss) income	48				48
Other comprehensive (loss) income, net of tax	6					6
Issuance of common stock under stock-based compensation plans, net of shares withheld for employee taxes	(2)		$ (2)
Issuance of common stock under stock-based compensation plans, net of shares withheld for employee taxes, Shares		187,000	84,000
Stock-based compensation	7			7
Ending Balance at Mar. 31, 2019	1,592		$ (2)	1,727	50	(183)
Ending Balance, Shares at Mar. 31, 2019		122,686,000	552,000
Beginning Balance at Dec. 31, 2019	1,602		$ (3)	1,761	38	(194)
Beginning Balance, Shares at Dec. 31, 2019		122,873,000	615,000
Net (loss) income	(21)				(21)
Other comprehensive (loss) income, net of tax	(66)					(66)
Issuance of common stock under stock-based compensation plans, net of shares withheld for employee taxes	(1)		$ (1)
Issuance of common stock under stock-based compensation plans, net of shares withheld for employee taxes, Shares		248,000	137,000
Stock-based compensation	7			7
Ending Balance at Mar. 31, 2020	$ 1,521		$ (4)	$ 1,768	$ 17	$ (260)
Ending Balance, Shares at Mar. 31, 2020		123,121,000	752,000