Derivative Instruments and Hedging Activities (Contractual maturities of interest rate hedging relationships) (Details) (USD $) In Millions, unless otherwise specified				9 Months Ended
	Jun. 30, 2012	Oct. 01, 2011	Jul. 02, 2011	Jun. 30, 2012 Interest Rate Swap 1 [Member]	Jun. 30, 2012 Interest Rate Swap 2 [Member]	Jun. 30, 2012 Interest Rate Swap 3 [Member]	Jun. 30, 2012 Interest Rate Swap 4 [Member]
Derivative [Line Items]
Notional amount of interest rate swaps derivatives outstanding	$ 40.0	$ 24.0	$ 24.0	$ 13.0	$ 6.0	$ 11.0	$ 10.0
Reference Rate				4.24%	1.06%	1.02%	1.08%
Basis Spread on variable rate	0.45%		0.45%	0.45%	0.45%	0.45%	0.45%
Start Date				Jul. 25, 2008	Dec. 20, 2011	Dec. 07, 2011	Dec. 29, 2011
End Date				Jul. 25, 2012	Sep. 20, 2012	Sep. 07, 2012	Sep. 28, 2012