Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Oct. 01, 2010
Cash flows from operating activities:
Net income	$ 202,078	$ 226,585	$ 137,294
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	72,172	58,338	40,741
Depreciation	69,545	59,788	46,573
Amortization of intangible assets and other	33,209	18,176	8,829
Contribution of common shares to savings and retirement plans	16,074	13,718	11,706
Deferred income taxes	(12,906)	(12,370)	(38,543)
Excess tax benefit from share-based payments	(6,814)	(12,490)	(6,287)
Change in fair value of contingent consideration	(5,414)	0	0
Other	(531)	(217)	(292)
Changes in assets and liabilities net of acquired balances:
Receivables, net	(109,213)	12,948	(60,198)
Inventory	(19,314)	(49,694)	(38,818)
Other current and long-term assets	(9,518)	(1,732)	(8,349)
Accounts payable	15,244	(14,350)	42,869
Other current and long-term liabilities	13,753	41,944	9,767
Net cash provided by operating activities	285,239	365,818	222,962
Cash flows from investing activities:
Capital expenditures	(94,129)	(100,660)	(88,929)
Payments for acquisitions, net of cash acquired	(229,628)	(249,284)	(6,400)
Sales and maturities of short term investments	20,900	0	0
Net cash used in investing activities	(302,857)	(349,944)	(95,329)
Cash flows from financing activities:
Retirement of debt and line of credit	(48,047)	(50,000)	(80,709)
Payment of Contingent Consideration	(52,940)	0	0
Excess tax benefit from share-based payments	6,814	12,490	6,287
Change in restricted cash	(105)	5,416	(265)
Repurchase of common stock - payroll tax withholdings on equity awards	(18,579)	(20,092)	(4,412)
Repurchase of common stock - share repurchase program	(12,405)	(70,043)	0
Net proceeds from exercise of stock options	38,993	63,185	40,502
Other, net	93	0	0
Net cash used in financing activities	(86,176)	(59,044)	(38,597)
Net (decrease) increase in cash and cash equivalents	(103,794)	(43,170)	89,036
Cash and cash equivalents at beginning of period	410,087	453,257	364,221
Cash and cash equivalents at end of period	306,293	410,087	453,257
Supplemental cash flow disclosures:
Income taxes paid	19,789	16,094	14,757
Interest paid	$ 239	$ 475	$ 715