GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS - Other Identifiable Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	May 28, 2017	May 29, 2016	May 31, 2015
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Gross Carrying Amount, non-amortizing intangible assets	$ 18.0	$ 18.0
Gross Carrying Amount, amortizing intangible assets	34.9	35.1
Accumulated Amortization, amortizing intangible assets	15.7	13.5
Total intangible assets, excluding goodwill	52.9	53.1
Amortization expense	$ 2.3	$ 1.9	$ 2.6