Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 30, 2012	Apr. 01, 2011
Cash flows from operating activities:
Net income	$ 91,159	$ 110,828
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	35,085	28,145
Depreciation	34,960	27,882
Amortization of intangible assets and other	16,117	3,945
Contribution of common shares to savings and retirement plans	7,958	6,638
Other	455	28
Deferred income taxes	(2,218)	(5,205)
Excess tax benefit from share-based payments	(5,363)	(10,887)
Changes in assets and liabilities net of acquired balances:
Receivables, net	(23,816)	(8,120)
Inventory	16,714	(25,308)
Other current and long-term assets	(4,430)	2,986
Accounts payable	11,338	(18)
Other current and long-term liabilities	11,793	15,721
Net cash provided by operating activities	194,188	157,045
Cash flows from investing activities:
Capital expenditures	(32,197)	(65,280)
Payments for acquisitions, net of cash acquired	(229,628)	(4,456)
Sales and maturities of short term investments	20,900	0
Net cash used in investing activities	(240,925)	(69,736)
Cash flows from financing activities:
Retirement of debt and line of credit	48,047	50,000
Excess tax benefit from share-based payments	5,363	10,887
Change in restricted cash	(150)	5,466
Repurchase of common stock - payroll tax withholdings on equity awards	(15,510)	(18,780)
Repurchase of common stock - share repurchase program	(12,405)	(41,564)
Net proceeds from exercise of stock options	13,873	57,226
Net cash used in financing activities	(56,876)	(36,765)
Net (decrease) increase in cash and cash equivalents	(103,613)	50,544
Cash and cash equivalents at beginning of period	410,087	453,257
Cash and cash equivalents at end of period	306,474	503,801
Supplemental cash flow disclosures:
Income taxes paid	9,115	9,844
Interest paid	$ 157	$ 263