Quarterly distribution of available cash (Details) $ in Millions	12 Months Ended
	Jul. 31, 2026 USD ($) item	Oct. 27, 2025 USD ($)	Jul. 31, 2025	Mar. 31, 2021 USD ($)	Mar. 30, 2021 USD ($)
Earnings Distribution Allocation [Line Items]
Cash reserve for distributions, number of quarters provided \| item	4
Maximum days after end of quarter to make distributions	45 days
Senior Notes 5.375 Percent Due 2026
Earnings Distribution Allocation [Line Items]
Aggregate principal amount	$ 650.0	$ 650.0
Interest rate, as a percent	5.375%	5.375%	5.375%
Senior Notes 5.875 Percent Due 2029
Earnings Distribution Allocation [Line Items]
Aggregate principal amount				$ 825.0
Interest rate, as a percent	5.875%		5.875%	5.875%
Senior Notes 9.250 Percent Due 2031
Earnings Distribution Allocation [Line Items]
Aggregate principal amount		$ 650.0
Interest rate, as a percent	9.25%	9.25%	9.25%
Ferrellgas, L.P.
Earnings Distribution Allocation [Line Items]
Cash reserve for distributions, number of quarters provided \| item	4
Maximum days after end of quarter to make distributions	45 days
Cash distributions to Ferrellgas Partners	99.00%
Cash distributions to general partner	1.00%
Ferrellgas, L.P. \| Senior Notes 5.875 Percent Due 2029
Earnings Distribution Allocation [Line Items]
Aggregate principal amount					$ 825.0
Interest rate, as a percent					5.875%
Ferrellgas, L.P. \| Senior Notes 9.250 Percent Due 2031
Earnings Distribution Allocation [Line Items]
Aggregate principal amount					$ 650.0
Interest rate, as a percent					9.25%