Goodwill and Intangible Assets (Goodwill and Acquired Intangible Assets) (Details) - USD ($) $ in Thousands		9 Months Ended
		Jul. 04, 2015	Sep. 30, 2014
Goodwill (not amortized), Net Book Value		$ 1,071,796	$ 1,012,527
Intangible assets with finite lives (amortized), Gross Carrying Amount	[1]	680,660	684,015
Intangible assets with finite lives (amortized), Accumulated Amortization	[1]	375,133	347,142
Intangible assets with finite lives (amortized), Net Book Value	[1]	305,527	336,873
Intangible Assets, Net (Including Goodwill)		1,377,323	1,349,400
Purchased Software
Intangible assets with finite lives (amortized), Gross Carrying Amount		284,427	278,012
Intangible assets with finite lives (amortized), Accumulated Amortization		169,903	162,259
Intangible assets with finite lives (amortized), Net Book Value	[1]	$ 114,524	115,753
Acquired finite-lived intangible asset, weighted average useful life		9 years
Capitalized Software
Intangible assets with finite lives (amortized), Gross Carrying Amount		$ 22,877	22,877
Intangible assets with finite lives (amortized), Accumulated Amortization		22,877	22,877
Intangible assets with finite lives (amortized), Net Book Value	[1]	0	0
Customer Lists and Relationships
Intangible assets with finite lives (amortized), Gross Carrying Amount		350,845	360,530
Intangible assets with finite lives (amortized), Accumulated Amortization		166,527	147,469
Intangible assets with finite lives (amortized), Net Book Value	[1]	$ 184,318	213,061
Acquired finite-lived intangible asset, weighted average useful life		10 years
Trademarks and Trade Names
Intangible assets with finite lives (amortized), Gross Carrying Amount		$ 18,573	18,479
Intangible assets with finite lives (amortized), Accumulated Amortization		12,221	10,964
Intangible assets with finite lives (amortized), Net Book Value	[1]	$ 6,352	7,515
Acquired finite-lived intangible asset, weighted average useful life		9 years
Other
Intangible assets with finite lives (amortized), Gross Carrying Amount		$ 3,938	4,117
Intangible assets with finite lives (amortized), Accumulated Amortization		3,605	3,573
Intangible assets with finite lives (amortized), Net Book Value	[1]	$ 333	$ 544
Acquired finite-lived intangible asset, weighted average useful life		3 years

[1] The weighted average useful lives of purchased software, customer lists and relationships, trademarks and trade names and other intangible assets with a remaining net book value are 9 years, 10 years, 9 years, and 3 years, respectively.