Components of Net Periodic Pension Benefit (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016	Jul. 01, 2017	Jun. 25, 2016
North America
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 2	$ 3	$ 4
Interest cost	9	12	19	23
Expected return on plan assets	(12)	(14)	(24)	(28)
Net periodic pension benefit	(2)		(2)	(1)
United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	1	2	3	4
Expected return on plan assets	(3)	(3)	(6)	(6)
Net periodic pension benefit	$ (2)	$ (1)	$ (3)	$ (2)