Leases (Details) - USD ($) $ in Millions	Jan. 31, 2023	Apr. 30, 2022
Leases [Abstract]
Operating lease right-of-use assets	$ 82.9	$ 106.5
Current operating lease liabilities	34.4	40.1
Noncurrent operating lease liabilities	56.3	76.2
Total operating lease liabilities	90.7	116.3
Machinery and equipment	8.6	8.1
Accumulated depreciation	(4.8)	(4.3)
Total property, plant, and equipment	$ 3.8	$ 3.8
Finance lease right-of-use assets balance sheet location	Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Machinery and Equipment, Gross, Property, Plant and Equipment, Net	Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Machinery and Equipment, Gross, Property, Plant and Equipment, Net
Other current liabilities	$ 1.4	$ 1.4
Finance lease current liabilities balance sheet location	Other Liabilities, Current	Other Liabilities, Current
Other noncurrent liabilities	$ 2.5	$ 2.5
Finance lease noncurrent liabilities balance sheet location	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Total finance lease liabilities	$ 3.9	$ 3.9
Total finance lease liabilities balance sheet location	Liabilities	Liabilities