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PENSION AND POSTRETIREMENT BENEFITS (Level 3) (Details) - USD ($) $ in Millions | 12 Months Ended
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May 29, 2016 | May 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Fair Value, | $ 942.3 | $ 730.8
Realized Gains (Losses) | 2.8 | 3.5
Unrealized Gains (Losses) | 22.3 | 41.0
Net Purchases and Sales | 41.6 | 167.0
Fair Value, | 1,009.0 | 942.3
Real estate funds |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Fair Value, | 344.9 | 170.6
Realized Gains (Losses) | 0.4 | 0.5
Unrealized Gains (Losses) | 46.1 | 21.0
Net Purchases and Sales | 33.6 | 152.8
Fair Value, | 425.0 | 344.9
Multi-strategy hedge funds |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Fair Value, | 484.5 | 462.3
Realized Gains (Losses) | 0.2 | 0.3
Unrealized Gains (Losses) | (17.2) | 22.8
Net Purchases and Sales | (1.1) | (0.9)
Fair Value, | 466.4 | 484.5
Private equity funds |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Fair Value, | 93.0 | 81.3
Realized Gains (Losses) | 2.2 | 2.7
Unrealized Gains (Losses) | (0.5) | (3.3)
Net Purchases and Sales | (5.0) | 12.3
Fair Value, | 89.7 | 93.0
Private natural resources funds |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Fair Value, | 19.9 | 16.6
Realized Gains (Losses) | 0.0 | 0.0
Unrealized Gains (Losses) | (6.1) | 0.5
Net Purchases and Sales | 14.1 | 2.8
Fair Value, | $ 27.9 | $ 19.9

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