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INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 24, 2019 | Nov. 25, 2018 | Nov. 24, 2019 | Nov. 25, 2018 | May 26, 2019
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax expense | $ 84.1 | $ 22.4 | $ 72.6 | $ 79.8 |
Effective tax rate | 24.30% | 14.30% | 14.30% | 20.30% |
Gross unrecognized tax benefits for uncertain tax positions | $ 36.8 |  | $ 36.8 |  | $ 44.1
Tax positions for which ultimate deductibility is highly certain but timing of such deductibility is uncertain | 0.8 |  | 0.8 |  | 1.0
Related liabilities for gross interest and penalties | 7.3 |  | 7.3 |  | 11.7
Net amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate | 31.0 |  | 31.0 |  | 37.3
Gross unrecognized tax benefits, estimated decrease over the next twelve months (up to) | 12.9 |  | 12.9 |  |
Deferred tax asset | 688.9 |  | 688.9 |  | 687.1
Corresponding valuation allowances | 687.9 |  | 687.9 |  | 687.1
Valuation allowance adjustment | 0.9 |  |  |  |
Discontinued operations |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Net amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate | $ 6.7 |  | $ 6.7 |  | $ 6.7

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