Summary Of Significant Accounting Policies (Deferred Taxes Assets And Liabilities) (Details) (USD $)	Jul. 31, 2012	Jul. 31, 2011
Deferred tax assets	$ 1,158,000	$ 992,000
Deferred tax liabilities	(4,241,000)	(3,194,000)
Net deferred tax liability	(3,083,000)	(2,202,000)
Ferrellgas, L.P. [Member]
Deferred tax assets	1,158,000	992,000
Deferred tax liabilities	(4,241,000)	(3,194,000)
Net deferred tax liability	$ (3,083,000)	$ (2,202,000)