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Stock-Based Compensation Plans (Stock-Based Compensation) (Details) (USD $) In Thousands	3 Months Ended
	Jul. 02, 2011	Jul. 03, 2010
Allocated share-based compensation expense	$ 13,767	$ 15,120
Cost Of Revenues [Member]
Allocated share-based compensation expense	1,310	1,267
Research And Development [Member]
Allocated share-based compensation expense	6,487	7,204
Selling, General And Administrative [Member]
Allocated share-based compensation expense	$ 5,970	$ 6,649

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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