Summary Of Significant Accounting Policies (Deferred Taxes Assets And Liabilities) (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Jul. 31, 2019
Significant Accounting Policies [Line Items]
Deferred tax assets	$ 4	$ 631
Deferred tax liabilities	(3)	(76)
Net deferred tax liability	1	555
Ferrellgas, L.P. [Member]
Significant Accounting Policies [Line Items]
Deferred tax assets	4	631
Deferred tax liabilities	(3)	(76)
Net deferred tax liability	$ 1	$ 555