Summary of significant accounting policies (Details) $ in Thousands	12 Months Ended
	Jul. 31, 2025 USD ($) subsidiary item
Summary of significant accounting policies
Number of reporting units | item	1
Goodwill impairment recognized | $	$ 0
Accounts receivable collection period	30 days
Revenue recognized over a straight-line basis, term	1 year
Number of taxable subsidiaries	1
Reporting unit, percentage of fair value in excess of carrying amount	189.00%
Ferrellgas Partners LP
Summary of significant accounting policies
General partner ownership interest	2.00%
Ferrellgas Partners LP | Non-Controlling Interest
Summary of significant accounting policies
General partner ownership interest	1.00%
Minimum [Member]
Summary of significant accounting policies
Property, plant and equipment useful life	2 years
Intangible asset useful life	5 years
Maximum [Member]
Summary of significant accounting policies
Property, plant and equipment useful life	30 years
Intangible asset useful life	15 years
Ferrellgas, L.P.
Summary of significant accounting policies
Number of taxable subsidiaries	3