VARIABLE INTEREST ENTITIES (Details) $ in Millions	12 Months Ended
	May 27, 2018 USD ($) property building	May 28, 2017 USD ($) lease	May 26, 2019 USD ($) property
Variable Interest Entity [Line Items]
Number buildings purchased in period | building	2
Gain (loss) recognized for early exit of lease contracts	$ (48.2)	$ 6.7
Number of expired lease agreements | lease		1
Loss on lease put option
Variable Interest Entity [Line Items]
Number of remaining leased buildings subject to a lease put option | property	1		1
Estimated amount by which put prices exceeded fair values of related properties	$ 8.2		$ 8.2
Accrued put cost	$ 1.2		$ 1.6