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SHARE-BASED PAYMENTS - Stock Option Plan (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 26, 2019 | May 27, 2018 | May 28, 2017 | Feb. 24, 2019 | Nov. 25, 2018 | Aug. 26, 2018 | Feb. 25, 2018 | Nov. 26, 2017 | Aug. 27, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Options granted (in shares) | 0 | 0 | 1,100,000 |  |  |  |  |  |
Total intrinsic value of options exercised | $ 7.9 | $ 15.8 | $ 29.8 |  |  |  |  |  |
Closing market price of common stock (in dollars per share) | $ 28.83 |  |  |  |  |  |  |  |
Unrecognized compensation expense, net of estimated forfeitures, related to stock options | $ 0.2 |  |  |  |  |  |  |  |
Cash received from option exercises | 12.4 | 25.1 | 84.4 |  |  |  |  |  |
Actual tax benefit realized for tax deductions from option exercises | $ 2.3 | $ 5.3 | $ 19.5 |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Closing market price of common stock (in dollars per share) | $ 22.37 | $ 35.34 |  | $ 20.85 | $ 32.42 | $ 34.64 | $ 35.47 | $ 32.43 | $ 33.07
Maximum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Closing market price of common stock (in dollars per share) | $ 31.28 | $ 38.29 |  | $ 32.60 | $ 38.25 | $ 38.94 | $ 38.50 | $ 35.87 | $ 39.95
Options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Award vesting period | 3 years |  |  |  |  |  |  |  |
Weighted average grant date value (in dollars per share) |  |  | $ 6.12 |  |  |  |  |  |
Compensation expense (income) | $ 2.2 | $ 4.2 | $ 6.2 |  |  |  |  |  |
Tax benefit | $ 0.5 | 1.4 | 2.4 |  |  |  |  |  |
Weighted average period for recognition | 1 month 24 days |  |  |  |  |  |  |  |
Options | Subsidiary |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Compensation expense (income) | $ 0.2 | $ 0.4 | 0.9 |  |  |  |  |  |
Options | Minimum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Expiration period of options | 7 years |  |  |  |  |  |  |  |
Options | Maximum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Expiration period of options | 10 years |  |  |  |  |  |  |  |
Discontinued operations | Options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Compensation expense (income) |  |  | $ 0.2 |  |  |  |  |  |

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