PENSION AND OTHER RETIREMENT PLANS Schedule of Contributions to Multiemployer Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Apr. 29, 2012	May 01, 2011	May 02, 2010
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	$ 1.4	$ 1.7	$ 2.0
United Food and Commerical Workers international Union Industry Pension Fund [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Certified Zone Status	Green
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description	Multiple
Entity Tax Identification Number	516055922
Multiemployer Plan Number	001
Multiemployer Plan, Period Contributions	1.1	1.4	1.7
Central Pension Fund of the International Union of Operating Engineers and Participating Employers [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Certified Zone Status	Green
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description	October 2013
Entity Tax Identification Number	366052390
Multiemployer Plan Number	001
Multiemployer Plan, Period Contributions	0.2	0.2	0.2
IAM National Pension Fund National Pension Plan [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Certified Zone Status	Green
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description	February 2014
Entity Tax Identification Number	516031295
Multiemployer Plan Number	002
Multiemployer Plan, Period Contributions	$ 0.1	$ 0.1	$ 0.1