Earnings Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 142	$ 151	$ 179	$ 809
Earnings Per Share, Basic [Abstract]
Basic	$ 2.10	$ 2.08	$ 2.62	$ 11.04
Diluted	$ 2.07	$ 2.03	$ 2.57	$ 10.74
Weighted average shares of common stock outstanding (in thousands):
Basic	67,649	72,709	68,325	73,278
Dilutive effect of stock awards	957	1,618	1,316	2,052
Diluted	68,606	74,327	69,641	75,330