Note 15. Lease Financing Obligation (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 27, 2011	Jul. 31, 2012	Dec. 30, 2011	Oct. 31, 2011	Mar. 31, 2011	Jun. 30, 2010	Dec. 31, 2009	Jul. 31, 2009	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.20%
Leased Asset Terminal Value					$ 12.2
Operating Leases, Income Statement, Sublease Revenue	1.4
Capital Lease Obligations		$ 0.9	$ 4.5	$ 5.8		$ 1.0	$ 1.3	$ 1.1
Capital Lease License Term		3 years	3 years	3 years		3 years	28 months	3 years
Debt Instrument, Interest Rate, Effective Percentage									2.00%	7.25%