Special Project Costs (Details) - Hostess Brands $ in Millions	3 Months Ended	9 Months Ended
	Jan. 31, 2025 USD ($)	Jan. 31, 2025 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	$ 7.8	$ 34.9
Restructuring and related cost, cost incurred to date	182.3	182.3
Transaction Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	0.0	0.0
Restructuring and related cost, cost incurred to date	99.0	99.0
Employee-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	2.5	9.5
Restructuring and related cost, cost incurred to date	42.9	42.9
Other transition and termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	5.3	25.4
Restructuring and related cost, cost incurred to date	$ 40.4	$ 40.4