Retirement Plans - Components of Net Periodic Benefit Costs (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Retirement Benefits [Abstract]
Service cost	$ 0	$ 0	$ 1	$ 1
Interest cost	9	9	18	18
Expected return on plan assets	(12)	(13)	(24)	(26)
Amortization of net loss	1	1	2	2
Net periodic pension benefit credits	$ (2)	$ (3)	$ (3)	$ (5)