Earnings Per Share (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Shares) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income (loss)	$ (63)	$ 139
Shares:
Weighted average outstanding shares	67,000,000	68,000,000
Equivalent shares from outstanding stock awards	1,000,000	0
Denominator for diluted calculation	68,000,000	68,000,000
Earnings Per Share:
Basic earnings per share	$ (0.93)	$ 2.04
Diluted earnings per share	$ (0.93)	$ 2.03