Integration and Restructuring Costs - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
2021 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred noncash charge	$ 18.6	$ 4.4
Restructuring and related cost, noncash charge incurred to date	23.0
Restructuring and related cost, incurred cost	28.5	24.1
Restructuring and related cost, expected cost	70.0
Ainsworth [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred noncash charge			$ 0.6
Restructuring and related cost, noncash charge incurred to date			4.7
Restructuring and related cost, incurred cost	0.0	0.0	16.5
Employee-related costs | 2021 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	6.3	17.3
Restructuring Reserve	$ 2.4	$ 14.6
Employee-related costs | Ainsworth [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost			$ 2.4