Components of Net Periodic Pension Benefit (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
North America
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 2	$ 3
Interest cost	9	9	18	19
Expected return on plan assets	(10)	(12)	(21)	(24)
Net periodic pension benefit		(2)	(1)	(2)
United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	1	1	3	3
Expected return on plan assets	(2)	(3)	(4)	(6)
Net periodic pension benefit	$ (1)	$ (2)	$ (1)	$ (3)