Leases - Additional Information (Details) $ in Millions	3 Months Ended
	Dec. 28, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Typical term of leases (not exceeding)	10 years
Fixed operating lease costs	$ 369
Variable lease costs	3,000
Operating lease payments	349
Right-of-use assets obtained in exchange for operating and finance lease liabilities	$ 8,200
Weighted-average remaining lease term	10 years 2 months 12 days
Weighted-average discount rate	2.10%
Leases not yet commenced, future payments	$ 2,100
Minimum
Lessee, Lease, Description [Line Items]
Leases not yet commenced, lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Leases not yet commenced, lease term	16 years