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Leases (Details) - USD ($)
$ in Millions
Jan. 31, 2022
Apr. 30, 2021
Operating lease right-of-use assets $ 113.4 $ 142.0
Current operating lease liabilities 39.7 41.1
Noncurrent operating lease liabilities 84.0 112.8
Total operating lease liabilities 123.7 153.9
Total finance lease liabilities 3.7 4.3
Machinery and Equipment [Member]    
Machinery and equipment 8.0 9.8
Accumulated Depreciation [Member]    
Accumulated depreciation (4.4) (5.5)
Property, Plant and Equipment [Member]    
Total property, plant, and equipment 3.6 4.3
Other Current Liabilities [Member]    
Current finance lease liabilities 1.4 1.8
Other Noncurrent Liabilities [Member]    
Noncurrent finance lease liabilities $ 2.3 $ 2.5