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PENSION AND OTHER RETIREMENT PLANS Schedule of Contributions to Multiemployer Plans (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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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

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- Definition The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation 12B -Number 240 -Section 12b -Subsection 1 + Details
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- Definition Three digit plan number for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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- Definition Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450691-114947 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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- Definition Indicate the multiemployer plan's certified zone status as currently required by the Pension Protection Act of 2006 or a subsequent amendment thereof. The zone status categories are red (critical status), orange (seriously endangered), yellow (endangered), and green (none of the above). The acceptable values are "red", "orange", "yellow", "green", "other", and "NA". A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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- Definition Description of the significant collective-bargaining arrangements within the range of expiration dates for collective-bargaining arrangements requiring contributions to a multiemployer plan as well as other information to help investors understand the significance of the collective-bargaining agreements and when they expire. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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