Supplemental financial statement information - Cash, Cash Equivalents And Restricted Cash (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Supplemental financial statement information
Cash and cash equivalents	$ 96,883	$ 113,482
Restricted cash		10,678
Cash, cash equivalents and restricted cash	96,883	124,160	$ 137,347	$ 158,737
Cash paid for interest	96,072	89,151	90,349
Cash paid for income taxes	1,345	699	1,092
Non-cash investing and financing activities:
Liabilities incurred in connection with acquisitions	635	1,585	3,435
Change in accruals for property, plant and equipment additions	(274)	1,168	80
Lease liabilities arising from operating ROU assets	13,415	14,204	10,189
Lease liabilities arising from finance ROU assets	23,371	5,356	671
Accrued senior preferred units distributions	17,280	17,538	17,452
Acquisition of assets in failed sale-leaseback	5,032	2,496
Liability in connection with failed sale-leaseback	3,946	2,353
Ferrellgas, L.P.
Supplemental financial statement information
Cash and cash equivalents	96,582	113,054
Restricted cash		10,678
Cash, cash equivalents and restricted cash	96,582	123,732	137,245	$ 158,466
Cash paid for interest	96,072	89,151	90,349
Cash paid for income taxes	1,291	647	1,087
Non-cash investing and financing activities:
Liabilities incurred in connection with acquisitions	635	1,585	3,435
Change in accruals for property, plant and equipment additions	(274)	1,168	80
Lease liabilities arising from operating ROU assets	13,415	14,204	10,189
Lease liabilities arising from finance ROU assets	23,371	5,356	671
Accrued senior preferred units distributions	17,280	17,538	$ 17,452
Acquisition of assets in failed sale-leaseback	5,032	2,496
Liability in connection with failed sale-leaseback	$ 3,946	$ 2,353