Leases (Details) - USD ($) $ in Millions	Apr. 30, 2022	Apr. 30, 2021
Leases [Abstract]
Operating lease right-of-use assets	$ 106.5	$ 142.0
Current operating lease liabilities	40.1	41.1
Noncurrent operating lease liabilities	76.2	112.8
Total operating lease liabilities	116.3	153.9
Machinery and equipment	8.1	9.8
Accumulated depreciation	$ (4.3)	$ (5.5)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	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
Total property, plant, and equipment	$ 3.8	$ 4.3
Other current liabilities	$ 1.4	$ 1.8
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current	Other Liabilities, Current
Other noncurrent liabilities	$ 2.5	$ 2.5
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Total finance lease liabilities	$ 3.9	$ 4.3
Total finance lease liabilities	Liabilities	Liabilities