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Significant Accounting Policies - Summary of Depreciation Calculation (Details)
12 Months Ended
May 31, 2021
Land  
Property Plant And Equipment [Line Items]  
Depreciation method Not depreciated
Depreciation term (estimated useful life) No term
Production Facility  
Property Plant And Equipment [Line Items]  
Depreciation method Straight-line
Production Facility | Minimum  
Property Plant And Equipment [Line Items]  
Depreciation term (estimated useful life) 20 years
Production Facility | Maximum  
Property Plant And Equipment [Line Items]  
Depreciation term (estimated useful life) 30 years
Equipment  
Property Plant And Equipment [Line Items]  
Depreciation method Straight-line
Equipment | Minimum  
Property Plant And Equipment [Line Items]  
Depreciation term (estimated useful life) 3 years
Equipment | Maximum  
Property Plant And Equipment [Line Items]  
Depreciation term (estimated useful life) 25 years
Leasehold Improvements  
Property Plant And Equipment [Line Items]  
Depreciation method Straight-line
Depreciation term (estimated useful life) Lesser of estimated useful life or lease term
Construction in Progress  
Property Plant And Equipment [Line Items]  
Depreciation method Not depreciated
Depreciation term (estimated useful life) No term
Finance Lease Right-of-use Assets  
Property Plant And Equipment [Line Items]  
Depreciation method Straight-line
Depreciation term (estimated useful life) Lesser of the lease term and the useful life of the leased asset