Earnings Per Share (Schedule of Earnings Per Share) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income		$ 98	$ 234
Basic weighted-average shares		110.4	111.1
Effect of dilutive restricted stock units (“RSUs”)		0.4	0.3
Diluted weighted-average shares		110.8	111.4
Basic	[1]	$ 0.89	$ 2.10
Diluted	[1]	$ 0.88	$ 2.10

[1] Net income per share may not recalculate due to rounding.