RESTRUCTURING ACTIVITIES - Schedule of Liabilities Recorded for the SCAE Plan (Details) - SCAE Plan $ in Millions	9 Months Ended
	Feb. 26, 2017 USD ($)
Restructuring Cost and Reserve
Beginning balance	$ 99.4
Costs Incurred and Charged to Expense	34.3
Costs Paid or Otherwise Settled	(69.2)
Changes in Estimates	(0.2)
Ending balance	64.3
Multi-employer pension costs
Restructuring Cost and Reserve
Beginning balance	40.7
Costs Incurred and Charged to Expense	0.0
Costs Paid or Otherwise Settled	(10.9)
Changes in Estimates	2.0
Ending balance	31.8
Severance
Restructuring Cost and Reserve
Beginning balance	47.2
Costs Incurred and Charged to Expense	10.6
Costs Paid or Otherwise Settled	(38.2)
Changes in Estimates	(1.8)
Ending balance	17.8
Consulting
Restructuring Cost and Reserve
Beginning balance	4.7
Costs Incurred and Charged to Expense	0.3
Costs Paid or Otherwise Settled	(4.6)
Changes in Estimates	(0.2)
Ending balance	0.2
Contract termination
Restructuring Cost and Reserve
Beginning balance	6.3
Costs Incurred and Charged to Expense	11.4
Costs Paid or Otherwise Settled	(4.9)
Changes in Estimates	(0.2)
Ending balance	12.6
Other costs
Restructuring Cost and Reserve
Beginning balance	0.5
Costs Incurred and Charged to Expense	12.0
Costs Paid or Otherwise Settled	(10.6)
Changes in Estimates	0.0
Ending balance	$ 1.9