Summary Of Significant Accounting Policies (Deferred Taxes Assets And Liabilities) (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Jul. 31, 2018
Significant Accounting Policies [Line Items]
Deferred tax assets	$ 631	$ 715
Deferred tax liabilities	(76)	(16)
Net deferred tax liability	555	699
Ferrellgas, L.P. [Member]
Significant Accounting Policies [Line Items]
Deferred tax assets	631	715
Deferred tax liabilities	(76)	(16)
Net deferred tax liability	$ 555	$ 699