Goodwill and Intangible Assets (Goodwill and Acquired Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 29, 2012		Sep. 30, 2012
Goodwill (not amortized), Net Book Value	$ 755,075		$ 610,347
Intangible assets with finite lives (amortized), Gross Carrying Amount	562,129	[1]	441,590	[1]
Intangible assets with finite lives (amortized), Accumulated Amortization	269,204	[1]	255,705	[1]
Intangible assets with finite lives (amortized), Net Book Value	292,925	[1]	185,885	[1]
Total goodwill and acquired intangible asset	1,048,000		796,232
Purchased Software [Member]
Intangible assets with finite lives (amortized), Gross Carrying Amount	228,458		177,166
Intangible assets with finite lives (amortized), Accumulated Amortization	133,134		127,250
Intangible assets with finite lives (amortized), Net Book Value	95,324	[1]	49,916	[1]
Acquired finite-lived intangible asset, weighted average useful life	8 years
Capitalized Software [Member]
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 [Member]
Intangible assets with finite lives (amortized), Gross Carrying Amount	293,873		227,097
Intangible assets with finite lives (amortized), Accumulated Amortization	100,453		93,215
Intangible assets with finite lives (amortized), Net Book Value	193,420	[1]	133,882	[1]
Acquired finite-lived intangible asset, weighted average useful life	10 years
Trademarks And Trade Names [Member]
Intangible assets with finite lives (amortized), Gross Carrying Amount	13,437		11,013
Intangible assets with finite lives (amortized), Accumulated Amortization	9,286		8,967
Intangible assets with finite lives (amortized), Net Book Value	4,151	[1]	2,046	[1]
Acquired finite-lived intangible asset, weighted average useful life	7 years
Other [Member]
Intangible assets with finite lives (amortized), Gross Carrying Amount	3,484		3,437
Intangible assets with finite lives (amortized), Accumulated Amortization	3,454		3,396
Intangible assets with finite lives (amortized), Net Book Value	$ 30	[1]	$ 41	[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, 7 years, and 3 years, respectively.