Other Financial Instruments and Fair Value Measurements (Details Textual) $ in Millions	3 Months Ended
	Jul. 31, 2023 USD ($)
Other Financial Instruments and Fair Value Measurements (Textual) [Abstract]
Company's Municipal bond mature in 2024	$ 1.4
Company's Municipal bond mature in 2025	1.3
Company's Municipal bond mature in 2026	0.8
Company's Municipal bond mature in 2027	4.9
Company's Municipal bond mature in 2028	0.4
Company's Municipal bond mature in 2029 and beyond	$ 9.4
Post Holdings Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in equity securities, current, ownership percentage	8.00%
Unrealized Gain (Loss) on Investments	$ (28.0)