Partners' Capital (Narrative) (Details) (USD $)	12 Months Ended										12 Months Ended									0 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2014 Ferrellgas, L.P. [Member]	Jul. 31, 2014 Ferrell Companies [Member]	Jul. 31, 2012 Ferrell Companies [Member]	Jul. 31, 2014 FCI Trading Corp. [Member]	Jul. 31, 2013 FCI Trading Corp. [Member]	Jul. 31, 2014 Ferrell Propane, Inc. [Member]	Jul. 31, 2013 Ferrell Propane, Inc. [Member]	Jul. 31, 2014 Ferrell Companies Beneficial Ownership [Member]	Jul. 31, 2014 Ferrellgas Partners [Member]	Jul. 31, 2014 Ferrellgas Partners [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2013 Ferrellgas Partners [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2014 General Partner [Member]	Jul. 31, 2013 General Partner [Member]	Jul. 31, 2014 General Partner [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2013 General Partner [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2012 Investor [Member]	Sep. 12, 2014 Subsequent Event [Member]	Aug. 21, 2014 Subsequent Event [Member]	Sep. 12, 2014 Subsequent Event [Member] Ferrellgas, L.P. [Member]	Aug. 21, 2014 Subsequent Event [Member] Ferrellgas, L.P. [Member]	Sep. 12, 2014 Subsequent Event [Member] Ferrell Companies [Member]	Sep. 12, 2014 Subsequent Event [Member] FCI Trading Corp. [Member]	Sep. 12, 2014 Subsequent Event [Member] Ferrell Propane, Inc. [Member]	Sep. 12, 2014 Subsequent Event [Member] Ferrellgas Partners [Member] Ferrellgas, L.P. [Member]	Sep. 12, 2014 Subsequent Event [Member] General Partner [Member]	Sep. 12, 2014 Subsequent Event [Member] General Partner [Member] Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
Limited partner ownership interest					26.40%						26.70%	98.00%
Common unitholders, units outstanding	81,228,237	79,072,819					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. 21, 2014		Aug. 21, 2014
Distribution Made to Limited Partner, Cash Distributions Declared																								$ 11,265,000	$ 98,000	$ 26,000	$ 41,800,000	$ 418,000	$ 400,000
Cash distributions declared per common unit																					$ 0.50
Cash distributions, payment date																				Sep. 12, 2014		Sep. 12, 2014
Stock Issued During Period, Shares, Treasury Stock Reissued	2,000,000
Stock Issued During Period, Value, Other	50,000,000
Offering of common units, shares						1,400,000													1,500,000	1,500,000		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	1,500,000
Cash received from contributions	511,000	9,000	511,000										51,100,000	800,000	1,100,000	18,000	500,000	9,000
Non-cash contributions														$ 1,500,000	$ 900,000	$ 600,000	$ 500,000	$ 300,000