Derivative Instruments - Derivatives by Income Statement Location and Comprehensive Income (Details) (Cash flow hedging, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 29, 2013	Mar. 30, 2012	Mar. 29, 2013	Mar. 30, 2012
Designated as hedging instrument
Derivative instruments
(Gain) loss recognized in comprehensive income	$ 2,466	$ 14,986	$ 8,943	$ 33,718
(Gain) loss reclassified from AOCI	6,677	28,496	14,216	59,517
Designated as hedging instrument | Interest rate swap agreements
Derivative instruments
(Gain) loss recognized in comprehensive income	3,166	13,225	6,298	29,301
Designated as hedging instrument | Interest rate swap agreements | Interest expense
Derivative instruments
(Gain) loss reclassified from AOCI	5,668	26,620	11,210	55,458
Designated as hedging instrument | Cross currency swap agreements
Derivative instruments
(Gain) loss recognized in comprehensive income	(700)	1,752	2,645	4,478
Designated as hedging instrument | Cross currency swap agreements | Interest expense
Derivative instruments
(Gain) loss reclassified from AOCI	1,009	1,817	3,006	3,930
Designated as hedging instrument | Natural gas hedge agreements
Derivative instruments
(Gain) loss recognized in comprehensive income	0	9	0	(61)
Designated as hedging instrument | Natural gas hedge agreements | Cost of services provided
Derivative instruments
(Gain) loss reclassified from AOCI	0	59	0	129
Not designated as hedging instrument
Derivative instruments
(Gain) loss reclassified recognized in income	(8,648)	2,056	(5,152)	737
Not designated as hedging instrument | Cross currency swap agreements | Interest expense
Derivative instruments
(Gain) loss reclassified recognized in income	(1,513)	0	1,021	0
Not designated as hedging instrument | Gasoline and diesel fuel agreements | Cost of services provided
Derivative instruments
(Gain) loss reclassified recognized in income	(253)	(466)	(131)	(1,003)
Not designated as hedging instrument | Foreign exchange forward | Interest expense
Derivative instruments
(Gain) loss reclassified recognized in income	$ (6,882)	$ 2,522	$ (6,042)	$ 1,740