Revenue - Costs to Obtain a Contract (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Disaggregation of Revenue [Line Items]
Costs to obtain and fulfill a contract, expense	$ 13.5	$ 7.2	$ 5.9
Capitalized contract cost, impairment loss	0.0	0.0	$ 0.0
Prepaid Expenses and Other Current Assets
Disaggregation of Revenue [Line Items]
Costs to obtain and fulfill a contract	7.1	7.0
Other Assets
Disaggregation of Revenue [Line Items]
Costs to obtain and fulfill a contract	$ 7.9	$ 11.0