Derivative Instruments (Narrative) (Details)	12 Months Ended
	Sep. 27, 2015 USD ($)	Sep. 28, 2014 USD ($)	Sep. 29, 2013 USD ($)	Jun. 15, 2015 USD ($) agreements	Apr. 14, 2014 USD ($) agreements	Aug. 31, 2010 USD ($) agreements
Derivative [Line Items]
Interest rate derivatives held (swap agreements) | agreements				11	9	2
Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative, Notional Amount					$ 300,000,000	$ 100,000,000
Interest rate swaps hedge ineffectiveness	$ 0	$ 0	$ 0
October 2015 through October 2018 | Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative, Notional Amount				$ 200,000,000
October 2018 through October 2022 | Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative, Notional Amount				$ 500,000,000