Earnings Per Share (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Shares) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings:
Net income	$ 284	$ (22)	$ 419	$ 461
Shares:
Weighted average outstanding shares	67	68	67	68
Equivalent shares from outstanding stock awards	1	0	1	0
Denominator for diluted calculation	68	68	68	68
Earnings Per Share:
Basic earnings per share	$ 4.24	$ (0.32)	$ 6.25	$ 6.78
Diluted earnings per share	$ 4.19	$ (0.32)	$ 6.19	$ 6.74