EMPLOYEE BENEFIT PLANS AND OTHER POST-RETIREMENT BENEFITS - Actuarial Assumptions (Details)	12 Months Ended
	May 27, 2018	May 28, 2017	May 29, 2016
Pension Plan
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate (as percent)		4.33%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate (as percent)		3.81%
Long-term rate of return on plan assets (as percent)		7.50%
Pension Plan | Forecast
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate (as percent)	4.33%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Long-term rate of return on plan assets (as percent)	7.50%
Postretirement Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate (as percent)			3.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate (as percent)			3.18%
Postretirement Plans | Forecast
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate (as percent)	3.50%