Calculation of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Basic Earnings Per Share
Net income	$ 53	$ 45
Weighted-average shares outstanding	53	53
Basic earnings per share	$ 0.99	$ 0.86
Diluted Earnings Per Share
Net income	$ 53	$ 45
Weighted-average shares outstanding	53	53
Stock options and restricted stock	3	1
Diluted weighted-average shares outstanding	56	54
Diluted earnings per share	$ 0.95	$ 0.84