Earnings Per Share - Reconciliation of Weighted Average Number of Shares of Common Stock Outstanding In Calculating EPS (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income (loss)	$ 31	$ (40)	$ (3)	$ (120)
Denominator:
Weighted average shares used to compute Basic EPS	139,692,000	137,076,000	139,392,000	136,411,000
Weighted average effect of dilutive securities:
Stock options	1
RSUs/MSUs	1,129
2026 Senior Notes (Note 7)	4,674
Weighted average shares used to compute Diluted EPS	145,496,000	137,076,000	139,392,000	136,411,000
Basic EPS	$ 0.22	$ (0.29)	$ (0.02)	$ (0.88)
Diluted EPS	$ 0.21	$ (0.29)	$ (0.02)	$ (0.88)