Calculation of Loss Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Mar. 30, 2019	Jun. 27, 2020	Jun. 29, 2019
Basic Loss Per Share
Net loss	$ (439)	$ 45	$ (24)	$ 8	$ (394)	$ (16)
Weighted-average shares outstanding	53		55		53	54
Basic loss per share	$ (8.34)		$ (0.43)		$ (7.46)	$ (0.29)
Diluted Loss Per Share
Net loss	$ (439)	$ 45	$ (24)	$ 8	$ (394)	$ (16)
Weighted-average shares outstanding	53		55		53	54
Stock options and restricted stock	1				1	1
Diluted weighted-average shares outstanding	54		55		54	55
Diluted	$ (8.19)		$ (0.43)		$ (7.31)	$ (0.28)