Summary Of Significant Accounting Policies (Summary Of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Significant Accounting Policies [Line Items]
Current expense	$ 297	$ 180	$ 1,140
Deferred expense	554	143	(3,818)
Income tax expense	851	323	(2,678)
Ferrellgas, L.P. [Member]
Significant Accounting Policies [Line Items]
Current expense	248	150	1,119
Deferred expense	554	143	(3,818)
Income tax expense	$ 802	$ 293	$ (2,699)