Leases - Balance sheet and other information (Details) - USD ($) $ in Millions	Jul. 04, 2020	Jan. 04, 2020
Operating leases:
Other assets	$ 255	$ 277
Other current liabilities	47	48
Other liabilities	$ 214	$ 233
Weighted-average remaining lease term (in years)
Operating leases	10 years	10 years 2 months 12 days
Weighted-average discount rate
Operating leases	4.43%	4.42%