Quarterly distribution of available cash (Details) - item	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Mar. 30, 2021
Earnings Distribution Allocation [Line Items]
Cash reserve for distributions, number of quarters provided	4
Maximum days after end of quarter to make distributions	45 days
Senior Notes 5.375 Percent Due 2026 [Member]
Earnings Distribution Allocation [Line Items]
Interest rate, as a percent	5.375%	5.375%
Senior Notes 5.875 Percent Due 2029 [Member]
Earnings Distribution Allocation [Line Items]
Interest rate, as a percent	5.875%	5.875%
Ferrellgas, L.P. [Member]
Earnings Distribution Allocation [Line Items]
Cash reserve for distributions, number of quarters provided	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. [Member] | Senior Notes 5.375 Percent Due 2026 [Member]
Earnings Distribution Allocation [Line Items]
Interest rate, as a percent			5.375%
Ferrellgas, L.P. [Member] | Senior Notes 5.875 Percent Due 2029 [Member]
Earnings Distribution Allocation [Line Items]
Interest rate, as a percent			5.875%