Derivative Instruments - Derivatives by Income Statement Location (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011
Not designated as hedging instrument
Derivative instruments
(Gain) loss reclassified recognized in income	$ (1,467)	$ (1,971)	$ (730)	$ (8,453)
Not designated as hedging instrument | Gasoline and diesel fuel agreements | Cost of services provided
Derivative instruments
(Gain) loss reclassified recognized in income	2,419	0	1,416	0
Not designated as hedging instrument | Foreign exchange forward | Interest expense
Derivative instruments
(Gain) loss reclassified recognized in income	(3,886)	(1,971)	(2,146)	(8,453)
Cash flow hedging | Designated as hedging instrument
Derivative instruments
(Gain) loss recognized in comprehensive income	383	7,515	34,101	49,824
(Gain) loss reclassified from AOCI	7,396	29,121	66,913	91,758
Cash flow hedging | Designated as hedging instrument | Interest rate swap agreements
Derivative instruments
(Gain) loss recognized in comprehensive income	(576)	9,498	28,725	48,365
Cash flow hedging | Designated as hedging instrument | Interest rate swap agreements | Interest expense
Derivative instruments
(Gain) loss reclassified from AOCI	5,508	27,615	60,966	86,045
Cash flow hedging | Designated as hedging instrument | Cross currency swap agreements
Derivative instruments
(Gain) loss recognized in comprehensive income	858	(709)	5,336	1,152
Cash flow hedging | Designated as hedging instrument | Cross currency swap agreements | Interest expense
Derivative instruments
(Gain) loss reclassified from AOCI	1,741	2,424	5,671	6,842
Cash flow hedging | Designated as hedging instrument | Natural gas hedge agreements
Derivative instruments
(Gain) loss recognized in comprehensive income	101	(30)	40	62
Cash flow hedging | Designated as hedging instrument | Natural gas hedge agreements | Cost of services provided
Derivative instruments
(Gain) loss reclassified from AOCI	147	0	276	158
Cash flow hedging | Designated as hedging instrument | Gasoline and diesel fuel agreements
Derivative instruments
(Gain) loss recognized in comprehensive income	0	(1,244)	0	245
Cash flow hedging | Designated as hedging instrument | Gasoline and diesel fuel agreements | Cost of services provided
Derivative instruments
(Gain) loss reclassified from AOCI	$ 0	$ (918)	$ 0	$ (1,287)