Leases (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 15, 2019	Jun. 15, 2019	Dec. 29, 2018	Dec. 30, 2017
Leases [Abstract]
lessee, operating lease, amortization amount included in operating lease cost	$ 94	$ 168
Lessee, Operating Lease, Term of Contract-Low End		1 year
Lessee, Operating Lease, Term of Contract-High End		20 years
Lessee, Operating Lease, Option to Extend		P5Y
Operating Lease, Weighted Average Remaining Lease Term	5 years	5 years
Operating Lease, Right-of-Use Asset	$ 1,473	$ 1,473
Operating Lease, Payments		206
Operating Lease, Expense	106	191
Operating Leases, Rent Expense			$ 771	$ 742
Operating Leases, Future Minimum Payments Due, Next Twelve Months	245	245	459
Operating Leases, Future Minimum Payments, Due in Two Years	421	421	406
Operating Leases, Future Minimum Payments, Due in Three Years	315	315	294
Operating Leases, Future Minimum Payments, Due in Four Years	229	229	210
Operating Leases, Future Minimum Payments, Due in Five Years	139	139	161
Operating Leases, Future Minimum Payments, Due Thereafter	320	320	310
Operating Leases, Future Minimum Payments Due	1,669	1,669	$ 1,840
Variable Lease, Cost	23	42
Short-term Lease, Cost	93	177
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		170
Operating Lease, Liability, Current	400	400
Operating Lease, Liability, Noncurrent	$ 1,071	$ 1,071
Operating Lease, Weighted Average Discount Rate, Percent	4.00%	4.00%
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	$ (198)	$ (198)
Operating Lease, Liability	$ 1,471	$ 1,471
Lessee, Operating Sublease, Option to Terminate		P1Y