Goodwill and Intangible Assets (Details) (USD $)	3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended				3 Months Ended	9 Months Ended			12 Months Ended					12 Months Ended
	Jun. 30, 2013	Sep. 29, 2013	Sep. 30, 2012	Jun. 30, 2013 ECS item	Sep. 29, 2013 ECS	Sep. 30, 2012 ECS	Sep. 30, 2012 ECS Fiscal 2012 realignment	Sep. 30, 2012 ECS Fiscal 2013 realignment	Jun. 30, 2013 TTC, GMP and AMT	Jun. 30, 2013 TTC	Jun. 30, 2013 GMP	Jun. 30, 2013 AMT	Sep. 29, 2013 TSS	Sep. 30, 2012 TSS	Sep. 30, 2012 TSS Fiscal 2012 realignment	Sep. 30, 2012 TSS Fiscal 2013 realignment	Oct. 02, 2011 Engineering and architecture services (EAS)	Sep. 30, 2012 Engineering and architecture services (EAS) Fiscal 2013 realignment	Sep. 29, 2013 RCM	Sep. 30, 2012 RCM	Sep. 30, 2012 RCM Fiscal 2012 realignment
Goodwill
Balance at beginning of the period		$ 635,958,000	$ 569,414,000		$ 412,308,000	$ 405,678,000							$ 173,867,000	$ 82,091,000			$ 17,710,000		$ 49,783,000	$ 63,935,000
Inter-segment transfer, net							(29,338,000)	2,605,000							45,435,000	15,105,000		(17,710,000)			(16,097,000)
Goodwill additions		163,022,000	48,548,000		14,364,000	15,367,000							3,594,000	31,236,000					145,064,000	1,945,000
Foreign exchange impact		(19,588,000)	18,910,000		(16,464,000)	18,910,000							118,000						(3,242,000)
Goodwill impairment	(56,600,000)	(56,600,000)	(914,000)		(56,600,000)	(914,000)			(56,600,000)	(27,900,000)	(11,900,000)	(16,800,000)
Balance at end of the period		722,792,000	635,958,000		353,608,000	412,308,000				111,100,000	72,300,000	32,600,000	177,579,000	173,867,000			17,710,000		191,605,000	49,783,000
Gross amounts of goodwill					411,100,000	413,200,000
Number of reporting units for which goodwill impairment test is triggered				3
Goodwill impairment, net of tax									48,100,000
Carrying value before impairment										245,634,000	116,184,000	56,474,000
Carrying value after impairment										$ 217,734,000	$ 104,284,000	$ 39,674,000