Condensed Consolidated Statements of Change in Shareholders’ Equity - USD ($) shares in Millions, $ in Millions	Common Stock	Additional paid in capital	Retained earnings (Accumulated deficit)	Accumulated other comprehensive income (loss)	Noncontrolling interest	Total
Balance at the beginning of period at Dec. 31, 2017	$ 1,550	$ 51	$ 118	$ 113	$ 1	$ 1,833
Balance at the beginning of period (in shares) at Dec. 31, 2017	56.2
Increase (Decrease) in Shareholders’ Equity
Common stock issued under employee stock purchase plan	$ 1					1
Common stock issued under employee stock purchase plan (in shares)	0.1
Common stock issued upon vesting or exercise of stock-based compensation awards	$ 7	(7)
Common stock issued upon vesting or exercise of stock-based compensation awards (shares)	0.1
Reclassification of liability classified stock-based compensation awards to equity classified		1				1
Equity classified stock-based compensation expense		8				8
Dividends ($0.01 for 2019 and $0.29 for 2018 per common share)			(16)			(16)
Comprehensive income (loss)			15	(8)		7
Balance at the end of period at Mar. 31, 2018	$ 1,558	53	117	105	1	1,834
Balance at the end of period (in shares) at Mar. 31, 2018	56.4
Balance at the beginning of period at Dec. 31, 2018	$ 1,713	59	(1,211)	82	1	$ 644
Balance at the beginning of period (in shares) at Dec. 31, 2018	59.4					59.4
Increase (Decrease) in Shareholders’ Equity
Reclassification of APIC due to U.S. Domestication	$ (1,713)	1,713
Common stock issued under employee stock purchase plan		1				$ 1
Common stock issued under employee stock purchase plan (in shares)	0.1
Common stock issued upon vesting or exercise of stock-based compensation awards (shares)	0.1
Equity classified stock-based compensation expense		1				1
Dividends ($0.01 for 2019 and $0.29 for 2018 per common share)			(1)			(1)
Comprehensive income (loss)			(59)	(6)		(65)
Balance at the end of period at Mar. 31, 2019		$ 1,774	$ (1,271)	$ 76	$ 1	$ 580
Balance at the end of period (in shares) at Mar. 31, 2019	59.6					59.6