Leases - Future Minimum Lease Payments Due Under ASC 842 Guidance (Details) - USD ($) $ in Millions	Sep. 29, 2019	Dec. 31, 2018
Operating Leases
2019 (excluding the nine months ended September 29, 2019)	$ 81
2020	281
2021	237
2022	191
2023	147
Thereafter	900
Total future lease payments	1,837
Less imputed interest	366
Present value of future lease payments	1,471
Less current portion of lease liabilities	241	$ 0
Long-term lease liabilities	1,230	$ 0
ROU assets	1,400
Finance Leases
2019 (excluding the nine months ended September 29, 2019)	22
2020	81
2021	75
2022	75
2023	29
Thereafter	67
Total future lease payments	349
Less imputed interest	68
Present value of future lease payments	281
Less current portion of lease liabilities	66
Long-term lease liabilities	215
ROU assets	$ 325