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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Advertising Costs (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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May 31, 2020 | May 26, 2019 | May 27, 2018
Accounting Policies [Abstract] |  |  |
Advertising and promotion expenses | $ 230.7 | $ 253.4 | $ 278.6

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- Definition The total expense recognized in the period for promotion, public relations, and brand or product advertising. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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