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Credit Facility (Details) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended
Dec. 30, 2012
Jun. 13, 2011
Line of Credit [Member]
Bank of America [Member]
Jun. 13, 2011
Line of Credit [Member]
Subsidiary Issuer [Member]
Maximum [Member]
Bank of America [Member]
Line of Credit Facility [Line Items]      
Maximum number of shares of Class A Preferred Shares of wholly owned subsidiary available for sale     1,431
Aggregate purchase price of preferred shares   $ 135  
Document Period End Date Dec. 30, 2012