Leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
Leases
Operating lease - Option to extend			true
Operating lease cost	$ 15	$ 16	$ 30	$ 32
Cash paid for operating lease liabilities			$ 30	$ 32
Maximum
Leases
Operating lease and finance lease - Remaining lease term			29 years
Operating lease - Option to extend the lease, term	25 years		25 years