Employee benefits (Details) $ in Thousands	12 Months Ended
	Jul. 31, 2025 USD ($) employee	Jul. 31, 2024 USD ($)	Jul. 31, 2023 USD ($)
Share-Based Compensation Arrangement by Share-Based Payment Award
Number of employees | employee	0
Non-cash employee stock ownership plan compensation charge	$ 3,143	$ 3,234	$ 2,935
Contributions to defined contribution plan	5,100	4,800	4,900
Ferrellgas, L.P.
Share-Based Compensation Arrangement by Share-Based Payment Award
Non-cash employee stock ownership plan compensation charge	$ 3,143	$ 3,234	$ 2,935