Calculation of Earnings (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Sep. 26, 2020	Sep. 28, 2019
Basic Earnings (Loss) Per Share
Net income (loss)	$ 57	$ (439)	$ 45	$ 60	$ (24)	$ 8	$ (337)	$ 44
Weighted-average shares outstanding	53			55			53	54
Basic earnings (loss) per share	$ 1.07			$ 1.09			$ (6.40)	$ 0.81
Diluted Earnings (Loss) Per Share
Net income (loss)	$ 57	$ (439)	$ 45	$ 60	$ (24)	$ 8	$ (337)	$ 44
Weighted-average shares outstanding	53			55			53	54
Stock options and restricted stock	1							1
Diluted weighted-average shares outstanding	54			55			53	55
Diluted	$ 1.04			$ 1.09			$ (6.40)	$ 0.79