Income Taxes	12 Months Ended
Income Taxes	Jul. 31, 2020
Ferrellgas Partners Finance Corp. [Member]
Income Tax Disclosure [Line Items]
Income Taxes	Income taxes Income taxes have been computed separately as the Finance Corp. files its own income tax return. Deferred income taxes are provided as a result of temporary differences between financial and tax reporting using the asset/liability method. Deferred income taxes are recognized for the tax consequences of temporary differences between the financial statement carrying amounts and tax basis of existing assets and liabilities. Due to the inability of the Finance Corp. to utilize the deferred tax benefit of $7,606 associated with the net operating loss carryforward of $36,221 generated during and prior to fiscal 2020, a valuation allowance has been provided on the full amount of the deferred tax asset. Accordingly, there is no net deferred tax benefit for fiscal 2020, 2019 or 2018, and there is no net deferred tax asset as of July 31, 2020 and 2019. The net operating loss carryforwards generated during and after fiscal 2018 are carried forward indefinitely, but are limited to 80% of the taxable income in any one period. The net operating losses generated prior to July 31, 2018 are subject to prior tax law and will expire at various dates through July 31, 2037.
Ferrellgas Finance Corp. [Member]
Income Tax Disclosure [Line Items]
Income Taxes	Income taxes Income taxes have been computed separately as the Finance Corp. files its own income tax return. Deferred income taxes are provided as a result of temporary differences between financial and tax reporting using the asset/liability method. Deferred income taxes are recognized for the tax consequences of temporary differences between the financial statement carrying amounts and tax basis of existing assets and liabilities. Due to the inability of the Finance Corp. to utilize the deferred tax benefit of $17,426 associated with the net operating loss carryforward of $82,979 generated prior to fiscal 2020, a valuation allowance has been provided on the full amount of the deferred tax asset. Accordingly, there is no net deferred tax benefit for fiscal 2020, 2019 or 2018, and there is no net deferred tax asset as of July 31, 2020 and 2019. The net operating loss carryforwards generated during and after fiscal 2018 are carried forward indefinitely, but are limited to 80% of the taxable income in any one period. The net operating losses generated prior to July 31, 2018 are still subject to prior tax law and will expire at various dates through July 31, 2037.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.