Supplemental Financial Statement Information (Narrative) (Details)	9 Months Ended
	Apr. 30, 2014 gal
Maximum term of supply procurement contracts	36 months
Net procurement of fixed priced propane in gallons	21,200,000
Ferrellgas, L.P. [Member]
Maximum term of supply procurement contracts	36 months
Net procurement of fixed priced propane in gallons	21,200,000