Components of Net Periodic Pension Benefit (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
North America
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 2	$ 4	$ 5
Interest cost	10	11	30	34
Expected return on plan assets	(12)	(14)	(36)	(41)
Net periodic pension benefit	(1)	(1)	(2)	(2)
United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	2	2	5	6
Expected return on plan assets	(3)	(3)	(9)	(9)
Net periodic pension benefit	$ (1)	$ (1)	$ (4)	$ (3)