Goodwill And Intangible Assets, Net (Narrative) (Details)	12 Months Ended
	Jul. 31, 2012
Customer Lists [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	15 years
Customer Lists [Member] | Ferrellgas, L.P. [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	15 years
Minimum [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	2 years
Minimum [Member] | Ferrellgas, L.P. [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	2 years
Minimum [Member] | Non-Compete Agreements And Other Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	2 years
Minimum [Member] | Non-Compete Agreements And Other Intangible Assets [Member] | Ferrellgas, L.P. [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	2 years
Maximum [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	15 years
Maximum [Member] | Ferrellgas, L.P. [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	15 years
Maximum [Member] | Non-Compete Agreements And Other Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	10 years
Maximum [Member] | Non-Compete Agreements And Other Intangible Assets [Member] | Ferrellgas, L.P. [Member]
Goodwill And Intangible Assets [Line Items]
Intangible asset useful life	10 years