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Leases (Narrative) (Details)
$ in Billions
12 Months Ended
Sep. 27, 2015
USD ($)
Property Subject to or Available for Operating Lease [Line Items]  
Minimum sublease rents $ 1.0
Lease term (in years) 20 years
Minimum [Member]  
Property Subject to or Available for Operating Lease [Line Items]  
Lease renewal option as lessee, minimum (in years) 5 years
Lease renewal option as lessor, minimum (in years) 5 years
Maximum [Member]  
Property Subject to or Available for Operating Lease [Line Items]  
Lease renewal option as lessee, minimum (in years) 20 years
Lease renewal option as lessor, minimum (in years) 20 years