SHARE-BASED PAYMENTS - Unrecognized compensation expense, net of estimated forfeitures (Details) $ in Millions	6 Months Ended
	Nov. 27, 2016 USD ($)
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 16.7
Remaining Weighted Average Recognition Period (in years)	2 years 1 month 6 days
Stock options
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 0.8
Remaining Weighted Average Recognition Period (in years)	1 year 6 months
Cash-settled restricted stock units
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 7.8
Remaining Weighted Average Recognition Period (in years)	2 years 1 month 6 days
Stock-settled restricted stock units
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 7.3
Remaining Weighted Average Recognition Period (in years)	2 years 1 month 6 days
Performance Units
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 0.8
Remaining Weighted Average Recognition Period (in years)	2 years