Goodwill And Intangible Assets, Net (Narrative) (Details)	12 Months Ended
	Jul. 31, 2011
Customers lists, maximum	15
Other intangible assets, minimum	2
Other intangible assets, maximum	15
Ferrellgas, L.P. And Subsidiaries [Member] | Non-Compete Agreements [Member]
Other intangible assets, minimum	2
Other intangible assets, maximum	10
Non-Compete Agreements [Member]
Other intangible assets, minimum	2
Other intangible assets, maximum	10
Ferrellgas, L.P. And Subsidiaries [Member]
Customers lists, maximum	15
Other intangible assets, minimum	2
Other intangible assets, maximum	15