Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
May 31, 2021	May 31, 2020	May 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,373,659	$ 3,313,860
Accumulated depreciation	(2,055,221)	(1,910,795)
Property, plant and equipment, net	1,318,438	1,403,065
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	190,711	188,720
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	698,094	682,768
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,409,785	2,347,636
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	38,320	40,188
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	36,749	54,548
Internal use software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	283,800	273,000
Accumulated depreciation	$ (154,100)	(131,700)
Property and equipment, useful lives	10 years
Amortization expense	$ 22,300	$ 21,500	$ 21,600

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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Amount of expense for amortization of capitalized computer software costs.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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