Components of Net Periodic Pension (Benefit) Cost (Detail) - UK - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 6	$ 6	$ 7
Expected return on plan assets	(8)	(11)	(10)
Settlement gain	(1)
Net periodic cost (benefit)	$ (3)	$ (5)	$ (3)