Earnings (Loss) Per Share (Computations) (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 Per Share [Abstract]
Net income	$ 128	$ 256	$ 646	$ 936
Basic
Weighted average shares outstanding (in shares)	271.4	271.7	271.7	271.8
Diluted
Weighted average shares outstanding (in shares)	271.4	271.7	271.7	271.8
Diluted effect of stock-based awards under compensation plans (in shares)	0.9	1.0	0.9	1.0
Total (in shares)	272.3	272.7	272.6	272.8
Earnings (loss) per share
Basic earnings (loss) per share (in usd per share)	$ 0.47	$ 0.94	$ 2.38	$ 3.44
Diluted earnings (loss) per share (in usd per share)	$ 0.47	$ 0.94	$ 2.37	$ 3.43