Accumulated Other Comprehensive Loss Activity, Net of Tax (Detail) - USD ($) $ 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
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 1,717	$ 2,135	$ 2,173	$ 2,082	$ 2,106	$ 2,126	$ 2,173	$ 2,126
Other comprehensive income (loss)	9	13	(42)	(9)	5	11	(20)	7
Balance	1,795	1,717	2,135	2,127	2,082	2,106	1,795	2,127
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(29)				(29)
Other comprehensive income (loss)							(19)
Balance	(48)						(48)
Change in Deferred Pension and Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(37)				(37)
Other comprehensive income (loss)							(1)
Balance	(38)						(38)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(95)	(108)	(66)	(83)	(88)	(99)	(66)	(99)
Other comprehensive income (loss)	9	13	(42)	(9)	5	11	(20)
Balance	$ (86)	$ (95)	$ (108)	$ (92)	$ (83)	$ (88)	$ (86)	$ (92)