Leases - Operating Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Lease expense:
Operating lease cost	$ 33	$ 33	$ 67	$ 65
Finance lease cost
Amortization of right-of-use assets	3	3	6	6
Interest on lease liabilities	0	0	1	1
Total finance lease cost	3	3	7	7
Short-term lease cost	1	1	1	3
Variable cost	9	8	17	17
Sublease income	(1)	(1)	(2)	(2)
Net lease expense	$ 45	$ 44	$ 90	$ 90