Goodwill and Intangible Assets (Goodwill and Acquired Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 29, 2014		Sep. 30, 2013
Goodwill (not amortized), Net Book Value	$ 869,324		$ 769,095
Intangible assets with finite lives (amortized), Gross Carrying Amount	610,805	[1]	578,088	[1]
Intangible assets with finite lives (amortized), Accumulated Amortization	330,904	[1]	304,967	[1]
Intangible assets with finite lives (amortized), Net Book Value	279,901	[1]	273,121	[1]
Total goodwill and acquired intangible asset, Net Book Value	1,149,225		1,042,216
Purchased Software
Intangible assets with finite lives (amortized), Gross Carrying Amount	255,412		233,566
Intangible assets with finite lives (amortized), Accumulated Amortization	157,818		148,127
Intangible assets with finite lives (amortized), Net Book Value	97,594	[1]	85,439	[1]
Acquired finite-lived intangible asset, weighted average useful life	8 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	0	[1]	0	[1]
Customer Lists and Relationships
Intangible assets with finite lives (amortized), Gross Carrying Amount	312,526		304,434
Intangible assets with finite lives (amortized), Accumulated Amortization	135,949		120,338
Intangible assets with finite lives (amortized), Net Book Value	176,577	[1]	184,096	[1]
Acquired finite-lived intangible asset, weighted average useful life	10 years
Trademarks and Trade Names
Intangible assets with finite lives (amortized), Gross Carrying Amount	15,797		13,427
Intangible assets with finite lives (amortized), Accumulated Amortization	10,640		10,097
Intangible assets with finite lives (amortized), Net Book Value	5,157	[1]	3,330	[1]
Acquired finite-lived intangible asset, weighted average useful life	8 years
Other
Intangible assets with finite lives (amortized), Gross Carrying Amount	4,193		3,784
Intangible assets with finite lives (amortized), Accumulated Amortization	3,620		3,528
Intangible assets with finite lives (amortized), Net Book Value	$ 573	[1]	$ 256	[1]
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 8 years, 10 years, 8 years, and 3 years, respectively.