Partners' Capital (Narrative) (Details) (USD $)	12 Months Ended										12 Months Ended									3 Months Ended		12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2013 Ferrellgas, L.P. [Member]	Jul. 31, 2013 Ferrell Companies [Member]	Jul. 31, 2012 Ferrell Companies [Member]	Jul. 31, 2013 FCI Trading Corp. [Member]	Jul. 31, 2012 FCI Trading Corp. [Member]	Jul. 31, 2013 Ferrell Propane, Inc. [Member]	Jul. 31, 2012 Ferrell Propane, Inc. [Member]	Jul. 31, 2013 Ferrell Companies Beneficial Ownership [Member]	Jul. 31, 2013 Ferrellgas Partners [Member]	Jul. 31, 2013 Ferrellgas Partners [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2012 Ferrellgas Partners [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2013 General Partner [Member]	Jul. 31, 2012 General Partner [Member]	Jul. 31, 2013 General Partner [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2012 General Partner [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2012 Investor [Member]	Jul. 31, 2013 Subsequent Event [Member]	Jul. 31, 2013 Subsequent Event [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2013 Subsequent Event [Member] Ferrell Companies [Member]	Jul. 31, 2013 Subsequent Event [Member] FCI Trading Corp. [Member]	Jul. 31, 2013 Subsequent Event [Member] Ferrell Propane, Inc. [Member]	Jul. 31, 2013 Subsequent Event [Member] Ferrellgas Partners [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2013 Subsequent Event [Member] General Partner [Member]	Jul. 31, 2013 Subsequent Event [Member] General Partner [Member] Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
Limited partner ownership interest					27.20%						27.50%	98.00%
Common unitholders, units outstanding	79,072,819	79,006,619					195,686	195,686	51,204	51,204
General partner ownership interest	1.00%			1.00%											2.00%		1.0101%
Minimum percentage ownership of outstanding common units resulting in non voting of owners	20.00%
Cash distribution declared date																				Aug. 22, 2013	Aug. 22, 2013
Distribution Made to Limited Partner, Cash Distributions Declared																						$ 10,735,000	$ 98,000	$ 26,000	$ 39,900,000	$ 399,000	$ 400,000
Cash distributions declared per common unit																				$ 0.50
Cash distributions, payment date																				Sep. 13, 2013	Sep. 13, 2013
Offering of common units, shares						1,400,000													1,500,000
Proceeds from offering of common units						25,000,000													25,000,000
Stock issued during the period for acquisition, shares		100,000
Stock issued during the period for acquisition, value		1,300,000
Cash received from contributions	9,000	511,000	1,594,000										800,000	50,700,000	18,000	1,100,000	9,000	500,000
Non-cash contributions														$ 1,300,000	$ 600,000	$ 400,000	$ 300,000	$ 200,000