STOCK-BASED COMPENSATION - Unrecognized Compensation Expense, Net of Estimated Forfeitures (Details) $ in Millions	3 Months Ended
	Aug. 27, 2017 USD ($)
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 23.7
Remaining Weighted Average Recognition Period (in years)	2 years 2 months 12 days
Stock options
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 1.1
Remaining Weighted Average Recognition Period (in years)	1 year 7 months 6 days
Stock-settled restricted stock units
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 16.1
Remaining Weighted Average Recognition Period (in years)	2 years 6 months
Cash-settled restricted stock units
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 5.7
Remaining Weighted Average Recognition Period (in years)	1 year 7 months 6 days
Performance Shares
Unrecognized compensation expense, net of estimated forfeitures
Unrecognized Compensation Expense	$ 0.8
Remaining Weighted Average Recognition Period (in years)	1 year 4 months 24 days