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PENSION AND POSTRETIREMENT BENEFITS (Contributions in the Aggregate) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May. 31, 2015 | May. 25, 2014 | May. 26, 2013
Multiemployer Plans [Line Items] |  |  |
Contributions by the Company | $ 12.0 | $ 12.4 | $ 9.4
Bakery and Confectionary Union and Industry International Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 526118572 |  |
PN | 001 |  |
Pension Protection Act Zone Status |  | Red | Red
FIP / RP Status Pending / Implemented | Implemented |  |
Contributions by the Company | $ 3.7 | $ 3.5 | $ 2.1
Surcharge Imposed | No |  |
Expiration Dates of Collective Bargaining Agreements | 2/29/2016 to 5/18/2018 |  |
Central States, Southeast and Southwest Areas Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 366044243 |  |
PN | 001 |  |
Pension Protection Act Zone Status |  | Red | Red
FIP / RP Status Pending / Implemented | Implemented |  |
Contributions by the Company | $ 2.0 | $ 2.1 | $ 1.2
Surcharge Imposed | No |  |
Expiration Dates of Collective Bargaining Agreements | 6/30/2015 to 6/04/2017 |  |
National Conference of Fireman & Oilers National Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 526085445 |  |
PN | 003 |  |
Pension Protection Act Zone Status |  | Yellow | Yellow
FIP / RP Status Pending / Implemented | Implemented |  |
Contributions by the Company | $ 0.6 | $ 0.7 | $ 0.3
Surcharge Imposed | No |  |
Expiration Dates of Collective Bargaining Agreements | 11/19/2015 |  |
Western Conference of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 916145047 |  |
PN | 001 |  |
Pension Protection Act Zone Status |  | Green | Green
FIP / RP Status Pending / Implemented | NA |  |
Contributions by the Company | $ 4.9 | $ 4.9 | $ 4.9
Surcharge Imposed | No |  |
Expiration Dates of Collective Bargaining Agreements | 06/30/2015 to 03/31/2018 |  |
Other Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Contributions by the Company | $ 0.8 | $ 1.2 | $ 0.9

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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=49170332&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=49170332&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=49170332&loc=SL14450657-114947 + Details
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