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PENSION AND POSTRETIREMENT BENEFITS - Schedule of Contributions for Plans That Are Not Individually Significant (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 30, 2021 | May 31, 2020 | May 26, 2019
Multiemployer Plans [Line Items] |  |  |
Entity Tax Identification Number | 47-0248710 |  |
Total Contributions | $ 7.4 | $ 6.5 | $ 6.0
Bakery and Confectionary Union and Industry International Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Entity Tax Identification Number | 52-6118572 |  |
PN | 001 |  |
Pension Protection Act Zone Status |  | Red | Red
FIP / RP Status | Implemented |  |
Total Contributions | $ 0.0 | $ 0.0 | $ 0.1
Surcharge Imposed | No |  |
Central States, Southeast and Southwest Areas Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Entity Tax Identification Number | 36-6044243 |  |
PN | 001 |  |
Pension Protection Act Zone Status |  | Red | Red
FIP / RP Status | Implemented |  |
Total Contributions | $ 2.2 | $ 2.0 | $ 1.8
Surcharge Imposed | No |  |
Expiration Dates of Collective Bargaining Agreements | May 31, 2021 |  |
Western Conference of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Entity Tax Identification Number | 91-6145047 |  |
PN | 001 |  |
Pension Protection Act Zone Status |  | Green | Green
FIP / RP Status | NA |  |
Total Contributions | $ 3.8 | $ 3.2 | $ 3.2
Surcharge Imposed | No |  |
Expiration Dates of Collective Bargaining Agreements | Jun. 30, 2022 |  |
Other Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Total Contributions | $ 1.4 | $ 1.3 | $ 0.9

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