Commitment and Contingencies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 19	$ 23	$ 60	$ 61
Cash paid for operating leases			52	53
ROU assets obtained in exchange for operating lease obligations			45	$ 57
Operating lease, not yet commenced, liability	$ 14		$ 14
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, not yet commenced, term of contract	3 years		3 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, not yet commenced, term of contract	15 years		15 years