Derivative Instruments - Derivatives by Balance Sheet Location (Details) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2012	Sep. 30, 2011
Derivative instruments
Fair value of derivative assets	$ 0	$ 2,856
Fair value of derivative liabilities	87,001	131,035
Designated as hedging instrument
Derivative instruments
Fair value of derivative liabilities	84,476	131,035
Foreign exchange forward | Prepayments | Not designated as hedging instrument
Derivative instruments
Fair value of derivative assets	0	2,856
Foreign exchange forward | Accounts payable | Not designated as hedging instrument
Derivative instruments
Fair value of derivative liabilities	1,067	0
Gasoline and diesel fuel agreements | Accounts payable | Not designated as hedging instrument
Derivative instruments
Fair value of derivative liabilities	1,458	0
Gasoline and diesel fuel agreements | Accounts payable | Designated as hedging instrument
Derivative instruments
Fair value of derivative liabilities	0	1,894
Natural gas hedge agreements | Accounts payable | Designated as hedging instrument
Derivative instruments
Fair value of derivative liabilities	120	187
Interest rate swap agreements | Accrued expenses | Designated as hedging instrument
Derivative instruments
Fair value of derivative liabilities	0	49,349
Interest rate swap agreements | Other noncurrent liabilities | Designated as hedging instrument
Derivative instruments
Fair value of derivative liabilities	45,529	44,054
Cross currency swap agreements | Other noncurrent liabilities | Designated as hedging instrument
Derivative instruments
Fair value of derivative liabilities	$ 38,827	$ 35,551