Supplemental Financial Statement Information (Narrative) (Details)	6 Months Ended
	Jan. 31, 2014 gal
Maximum term of supply procurement contracts	36 months
Net procurement of fixed priced propane in gallons	49,300,000
Ferrellgas, L.P. [Member]
Maximum term of supply procurement contracts	36 months
Net procurement of fixed priced propane in gallons	49,300,000