Leases - Other Information Related to Leases (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 29, 2019	Sep. 29, 2019	Jan. 01, 2019
Supplemental cash flows information:
Operating cash flows from operating leases	$ 15	$ 41
Operating cash flows from finance leases	(1)	1
Financing cash flows from finance leases	2	2
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	62	260
Lease liabilities	223	223	$ 188
Finance leases	$ 0	$ 0
Weighted average remaining lease term:
Operating leases (in years)	6 years	6 years
Finance leases (in years)	12 years 8 months 12 days	12 years 8 months 12 days
Weighted average discount rate:
Operating leases	3.10%	3.10%
Finance leases	4.50%	4.50%