Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 29, 2019	Dec. 29, 2018
Operating Leases
Remainder of 2019	$ 19
2020	36
2021	29
2022	27
2023	24
2024	4
After 2024	13
Total lease payments	152
Less amount representing interest	(19)
Present value of lease liabilities	133
Finance Leases
2019	41
2020	102
2021	80
2022	57
2023	54
2024	38
After 2024	23
Total lease payments	395
Less amount representing interest	(32)
Present value of lease liabilities	363
Total
2019	60
2020	138
2021	109
2022	84
2023	78
2024	42
After 2024	36
Total lease payments	547
Less amount representing interest	(51)
Present value of lease liabilities	496
Operating lease payments	6
Distribution Facility
Operating Leases
Less amount representing interest		$ (20)
Present value of lease liabilities	18
Total
Operating lease payments	$ 21