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Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Feb. 28, 2021	Aug. 31, 2020	May 31, 2021	May 31, 2020	May 31, 2019
Property, Plant and Equipment [Line Items]
Total at cost			$ 1,011.2	$ 996.9
Less: Accumulated depreciation and amortization			454.3	420.0
Property, plant and equipment, net			556.9	576.9
Asset impairments and write downs			11.1	40.6	$ 0.9
Depreciation and amortization expense			58.3	58.3	53.3
Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Proceeds from sale of assets	$ 5.1	$ 12.3
Gain (Loss) on Disposition of Property Plant Equipment	3.8	6.6
Long-lived assets	$ 1.3	$ 5.7
Lake Mary Facility
Property, Plant and Equipment [Line Items]
Assets Held-for-sale, Not Part of Disposal Group			4.1
Witney Facility
Property, Plant and Equipment [Line Items]
Assets Held-for-sale, Not Part of Disposal Group			2.3
Land
Property, Plant and Equipment [Line Items]
Total at cost			81.4	82.5
Building
Property, Plant and Equipment [Line Items]
Total at cost			244.8	246.7
Capitalized software
Property, Plant and Equipment [Line Items]
Total at cost			217.9	189.5
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Total at cost			209.4	217.0
Building and Leasehold improvements
Property, Plant and Equipment [Line Items]
Total at cost			214.4	212.2
Asset impairments and write downs			1.5
Construction in Progress
Property, Plant and Equipment [Line Items]
Total at cost			$ 43.3	49.0
Legacy Building Improvements
Property, Plant and Equipment [Line Items]
Asset impairments and write downs					$ 0.9
Software
Property, Plant and Equipment [Line Items]
Asset impairments and write downs				$ 0.6

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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