Leases - Balance sheet and other information (Details) - USD ($) $ in Millions	Apr. 04, 2020	Jan. 04, 2020
Operating leases:
Other assets	$ 272	$ 277
Other assets	us-gaap:OtherAssets
Other current liabilities	$ 49	48
Other current liabilities	us-gaap:OtherLiabilitiesCurrent
Other liabilities	$ 225	$ 233
Other liabilities	us-gaap:OtherLiabilities
Weighted-average remaining lease term (in years)
Operating leases	10 years	10 years 2 months 12 days
Weighted-average discount rate
Operating leases	4.42%	4.42%