Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jul. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable pledged as collateral	$ 200,443	$ 103,703
Accounts receivable, not pledged as collateral (including other reserves)	8,307	(825)
Notes receivable, current portion	15,148	12,648
Other	37	36
Less: Allowance for expected credit losses	(17,655)	(14,124)
Accounts and notes receivable, net	206,280	101,438
Ferrellgas, L.P. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable pledged as collateral	200,443	103,703
Accounts receivable, not pledged as collateral (including other reserves)	8,307	(825)
Notes receivable, current portion	15,148	12,648
Other	37	36
Less: Allowance for expected credit losses	(17,655)	(14,124)
Accounts and notes receivable, net	$ 206,280	$ 101,438