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PENSION AND POSTRETIREMENT BENEFITS - Schedule of Other Changes in Plan Assets and Benefit Obligations (Details) - USD ($) $ in Millions | 12 Months Ended
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May 30, 2021 | May 31, 2020 | May 26, 2019
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Currency translation adjustments | $ 51.8 | $ (41.3) | $ 0.2
Net amount recognized | 68.8 | 43.2 | $ (34.0)
Pension Plans |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Net actuarial gain (loss) | 92.0 | 21.9 |
Amortization of prior service cost (benefit) | 2.3 | 2.7 |
Settlement and curtailment loss (gain) | 0.2 | (1.3) |
Recognized net actuarial loss (gain) | 0.8 | 44.8 |
Currency translation adjustments | (0.2) | 0.0 |
Net amount recognized | 95.1 | 68.1 |
Postretirement Plans |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Net actuarial gain (loss) | 2.5 | (2.9) |
Amortization of prior service cost (benefit) | (2.1) | (2.1) |
Settlement and curtailment loss (gain) | (0.5) | (0.2) |
Recognized net actuarial loss (gain) | (3.5) | (4.6) |
Currency translation adjustments | (0.2) | 0.0 |
Net amount recognized | $ (3.8) | $ (9.8) |

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- Definition Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 + Details
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