RESTRUCTURING ACTIVITIES - Schedule of Liabilities Recorded for the SCAE Plan (Details) - SCAE Plan $ in Millions	3 Months Ended
	Aug. 26, 2018 USD ($)
Restructuring Cost and Reserve
Balance at May 27, 2018	$ 43.8
Costs Incurred and Charged to Expense	1.7
Costs Paid or Otherwise Settled	(6.5)
Changes in Estimates	(1.0)
Balance at August 26, 2018	38.0
Multi-employer pension costs
Restructuring Cost and Reserve
Balance at May 27, 2018	32.3
Costs Incurred and Charged to Expense	0.0
Costs Paid or Otherwise Settled	0.0
Changes in Estimates	0.2
Balance at August 26, 2018	32.5
Severance and related costs
Restructuring Cost and Reserve
Balance at May 27, 2018	6.3
Costs Incurred and Charged to Expense	0.0
Costs Paid or Otherwise Settled	(3.6)
Changes in Estimates	(1.7)
Balance at August 26, 2018	1.0
Consulting/professional fees
Restructuring Cost and Reserve
Balance at May 27, 2018	0.1
Costs Incurred and Charged to Expense	0.1
Costs Paid or Otherwise Settled	(0.2)
Changes in Estimates	0.0
Balance at August 26, 2018	0.0
Contract/lease termination
Restructuring Cost and Reserve
Balance at May 27, 2018	4.9
Costs Incurred and Charged to Expense	0.0
Costs Paid or Otherwise Settled	(1.6)
Changes in Estimates	0.5
Balance at August 26, 2018	3.8
Other costs
Restructuring Cost and Reserve
Balance at May 27, 2018	0.2
Costs Incurred and Charged to Expense	1.6
Costs Paid or Otherwise Settled	(1.1)
Changes in Estimates	0.0
Balance at August 26, 2018	$ 0.7