Calculation of Earnings (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 26, 2021	Mar. 27, 2021	Jun. 27, 2020	Mar. 28, 2020	Jun. 26, 2021	Jun. 27, 2020
Basic Earnings Per Share
Net loss	$ (88)	$ 53	$ (439)	$ 45	$ (35)	$ (394)
Weighted-average shares outstanding	54		53		54	53
Basic loss per share	$ (1.62)		$ (8.34)		$ (0.65)	$ (7.46)
Diluted Earnings Per Share
Net loss	$ (88)	$ 53	$ (439)	$ 45	$ (35)	$ (394)
Weighted-average shares outstanding	54		53		54	53
Stock options and restricted stock			1			1
Diluted weighted-average shares outstanding	54		54		54	54
Diluted loss per share	$ (1.62)		$ (8.19)		$ (0.65)	$ (7.31)