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Capital Stock - Additional Information (Detail) (USD $)
12 Months Ended
Mar. 30, 2013
Class
Mar. 31, 2012
Mar. 30, 2013
Class A Common Stock [Member]
Mar. 30, 2013
Class B Common Stock [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]        
Common stock voting rights per share     $ 1 $ 10
Preferred shares par value          
Number of classes of common stock outstanding 2