Mergers and Acquisitions (Details) (USD $)	12 Months Ended									3 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2011	Sep. 29, 2013 Prior to 2010 acquisitions	Sep. 30, 2012 Prior to 2010 acquisitions	Oct. 02, 2011 Prior to 2010 acquisitions	Sep. 29, 2013 AEG, Parkland and other 2013 acquisitions	Sep. 30, 2012 2012 acquisitions	Oct. 02, 2011 2011 acquisitions	Jan. 02, 2011 BPR, Inc.	Oct. 02, 2011 BPR, Inc.
Business acquisition
Estimated fair value of purchase prices							$ 248,900,000	$ 63,200,000	$ 100,000,000		$ 185,679,000
Initial payment							171,600,000	42,200,000	68,700,000		157,000,000
Estimated fair value of contingent earn-out obligations	81,800,000			0			75,300,000	19,000,000	26,900,000		28,700,000
Estimated contingent earn-out payments of aggregate maximum upon achievement of specified financial objectives	101,300,000						86,700,000	20,000,000	32,300,000		39,200,000
Period for contingent earn-out payments										2 years
Estimated fair values of the assets acquired and liabilities assumed
Current assets											77,698,000
Property and equipment											7,178,000
Goodwill											128,140,000
Intangible and other assets											36,988,000
Current liabilities											(42,481,000)
Long-term deferred taxes											(9,622,000)
Noncontrolling interests											(12,222,000)
Net assets acquired							248,900,000	63,200,000	100,000,000		185,679,000
Amount accrued								2,000,000	4,500,000
Liabilities							2,000,000
Estimated contingent earn-out liabilities
Beginning balance (at fair value)	51,539,000	75,159,000	20,504,000
Estimated earn-out liabilities for acquisition during the fiscal year	75,253,000	18,981,000	55,622,000	250,000	9,974,000	21,978,000
Increases due to re-measurement of fair value reported in interest expense	2,433,000	1,374,000	1,612,000
Net decreases due to re-measurement of fair value reported as gains in operating income	(9,560,000)	(19,246,000)	(1,755,000)
Foreign exchange impact	(2,480,000)	3,027,000	(743,000)
Earn-out payments
Reported as cash used in operating activities	(695,000)	(601,000)
Reported as cash used in investing activities	(1,279,000)	(11,773,000)	(22,059,000)
Reported as cash used in financing activities	(33,672,000)	(18,055,000)
Settlement of receivables due from sellers		(7,301,000)
Ending balance (at fair value)	$ 81,789,000	$ 51,539,000	$ 75,159,000