Restructuring Expense - Schedule of Restructuring Rollforward (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Nov. 28, 2020	Aug. 29, 2020	Nov. 30, 2019	Nov. 28, 2020	Nov. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 2.4		$ 4.2	$ 1.2	$ 6.1
Gain (Loss) on Disposition of Assets		$ (3.4)
International Contract
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1.6		0.4	(1.2)	0.6
North America Contract
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0.8		$ 3.8	2.4	$ 5.5
Other Restructuring Plans
Restructuring Cost and Reserve [Line Items]
Beginning Balance		6.7		6.7
Restructuring Costs				(1.9)
Amounts Paid				(2.2)
Gain (Loss) on Disposition of Assets				3.4
Ending Balance	6.0			6.0
Severance and Employee-Related | Other Restructuring Plans
Restructuring Cost and Reserve [Line Items]
Beginning Balance		5.9		5.9
Restructuring Costs				0.1
Amounts Paid				(2.1)
Ending Balance	3.9			3.9
Severance and Employee-Related | May 2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Beginning Balance		15.3		15.3
Restructuring Costs				3.1
Amounts Paid				(16.0)
Ending Balance	2.4			2.4
Exit or Disposal Activities | Other Restructuring Plans
Restructuring Cost and Reserve [Line Items]
Beginning Balance		$ 0.8		0.8
Restructuring Costs				(2.0)
Amounts Paid				(0.1)
Gain (Loss) on Disposition of Assets				3.4
Ending Balance	$ 2.1			$ 2.1