Income (Loss) per Share (Weighted Average Shares Outstanding) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 6	$ (78)	$ (74)	$ (194)
Weighted Average Number of Shares Outstanding, Basic	71	70	71	70
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	2	0	0	0
Weighted Average Number of Shares Outstanding, Diluted	73	70	71	70
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	8	10	11	10
Earnings Per Share, Basic	$ 0.08	$ (1.11)	$ (1.04)	$ (2.77)
Earnings Per Share, Diluted	$ 0.08	$ (1.11)	$ (1.04)	$ (2.77)