Employee Stock Plans (Schedule Of Share-Based Compensation Expense) (Details) (USD $) In Thousands	12 Months Ended
Sep. 30, 2011	Oct. 01, 2010	Oct. 02, 2009
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expenses	$ 42,000	$ 39,800	$ 42,600
Taxes on earnings	(14,063)	(14,373)	(13,796)
Net decrease in net earnings	27,955	25,440	28,781
Increase (decrease) on cash flows from operating activities	(22,570)	(15,072)	(9,639)
Increase (decrease) on cash flows from financing activities	22,570	15,072	9,639
Cost Of Revenues-Product [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expenses	3,917	3,680	4,285
Cost Of Revenues-Service Contracts And Other [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expenses	1,977	2,475	4,068
Research And Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expenses	5,467	4,931	5,239
Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expenses	$ 30,657	$ 28,727	$ 28,985

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified equity-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element reduces net cash provided by operating activities.

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