Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Tax Credit Carryforward [Line Items]
Income tax expense (benefit)	$ 184.0	$ 252.4	$ 82.1
Payment of assumed tax receivable agreement obligation	0.0	86.4	0.0
Undistributed earnings of foreign subsidiaries on which deferred income taxes not provided	18.1
Company's unrecognized tax benefits	2.5	4.6	5.3	$ 6.5
Unrecognized tax benefits that would affect the effective tax rate	$ 2.0	$ 3.7	$ 4.2
Time period over which it is reasonably possible that the Company could decrease its unrecognized tax benefits	12 months
Amount unrecognized tax benefit could decrease in next 12 months	$ 1.1
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 7.4