RESTRUCTURING ACTIVITIES - Schedule of Liabilities Recorded for the Restructuring Plan (Details) - Pinnacle Integration Restructuring Plan $ in Millions	6 Months Ended
	Nov. 25, 2018 USD ($)
Restructuring Cost and Reserve
May 27, 2018	$ 0.0
Costs Incurred and Charged to Expense	102.3
Costs Paid or Otherwise Settled	(20.8)
Changes in Estimates	0.0
November 25, 2018	81.5
Severance and related costs
Restructuring Cost and Reserve
May 27, 2018	0.0
Costs Incurred and Charged to Expense	93.0
Costs Paid or Otherwise Settled	(20.5)
Changes in Estimates	0.0
November 25, 2018	72.5
Consulting/professional fees
Restructuring Cost and Reserve
May 27, 2018	0.0
Costs Incurred and Charged to Expense	9.1
Costs Paid or Otherwise Settled	(0.3)
Changes in Estimates	0.0
November 25, 2018	8.8
Other costs
Restructuring Cost and Reserve
May 27, 2018	0.0
Costs Incurred and Charged to Expense	0.2
Costs Paid or Otherwise Settled	0.0
Changes in Estimates	0.0
November 25, 2018	$ 0.2