Common Stock and Stock Plans (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			185 Months Ended
	Mar. 30, 2012 Y	Apr. 01, 2011	Apr. 02, 2010	Mar. 30, 2012 Y
Summary of employee stock option activity
Stock options outstanding, shares beginning balance	3,839,468	4,718,176	5,449,049
Options outstanding, Weighted Average Exercise Price per Share, Beginning balance	$ 22.66	$ 20.90	$ 20.12
Options granted, Shares	368,000	266,250	383,900	9,320,033
Options granted, Weighted Average Exercise Price per Share	$ 44.73	$ 41.26	$ 29.05	$ 44.73
Options canceled, shares	(10,200)	(20,543)	(94,874)
Options canceled, Weighted Average Exercise Price per Share	$ 32.11	$ 27.40	$ 29.06
Exercise of stock options, shares	(795,634)	(1,124,415)	(1,019,899)
Options exercised, Weighted Average Exercise Price per Share	$ 18.45	$ 19.60	$ 19.06	$ 18.45
Stock options outstanding, shares ending balance	3,401,634	3,839,468	4,718,176	3,401,634
Options outstanding, Weighted Average Exercise Price per Share, Ending balance	$ 26.00	$ 22.66	$ 20.90	$ 26.00
Options outstanding, weighted average remaining contractual term	2.62			2.62
Options outstanding, Aggregate Intrinsic Value	$ 75,556			$ 75,556
Options vested and exercisable, shares	2,631,472			2,631,472
Options vested and exercisable, Weighted Average Exercise Price per Share	$ 22.27			$ 22.27
Options vested and exercisable, Weighted Average Remaining Contractual Term	2.01
Options vested and exercisable, Aggregate Intrinsic Value	$ 68,273			$ 68,273