Share Based Compensation (Details) (USD $)	12 Months Ended
Mar. 31, 2012	Mar. 26, 2011	Mar. 27, 2010
Summary of changes in outstanding stock options
Weighted average exercise price, beginning of period	$ 19.35	$ 12.96	$ 11.41
Weighted average exercise price, granted	$ 32.86	$ 31.51	$ 17.89
Weighted average exercise price, exercised	$ 14.47	$ 9.97	$ 9.25
Weighted average exercise price, canceled	$ 21.10	$ 18.22	$ 14.99
Weighted average exercise price, end of period	$ 22.75	$ 19.35	$ 12.96
Options outstanding, beginning balance	2,525,678	2,342,448	3,085,590
Options outstanding, granted	173,075	788,027	255,420
Options outstanding, exercised	(816,594)	(569,063)	(970,721)
Canceled, options	(30,571)	(35,734)	(27,841)
Options outstanding, ending balance	1,851,588	2,525,678	2,342,448

The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.

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Net number of share options (or share units) granted during the period.

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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