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INCOME TAXES - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 29, 2020 | Nov. 24, 2019 | Nov. 29, 2020 | Nov. 24, 2019 | May 31, 2020
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax expense (benefit) | $ 80.7 | $ 84.1 | $ 167.4 | $ 72.6 |
Effective tax rate | 17.60% | 24.30% | 19.10% | 14.30% |
Gross unrecognized tax benefits for uncertain tax positions | $ 33.9 |  | $ 33.9 |  | $ 35.8
Tax positions for which ultimate deductibility is highly certain but timing of such deductibility is uncertain | 0.8 |  | 0.8 |  | 0.7
Related liabilities for gross interest and penalties | 8.1 |  | 8.1 |  | 7.4
Net amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate | 28.8 |  | 28.8 |  | 30.3
Gross unrecognized tax benefits, estimated decrease over the next twelve months (up to) | 12.1 |  | 12.1 |  |
Deferred tax asset | 685.3 |  | 685.3 |  | 685.2
Corresponding valuation allowances | 660.0 |  | 660.0 |  | 685.2
Discontinued operations |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Net amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate | $ 6.5 |  | $ 6.5 |  | $ 6.5

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