Partners' Capital (Limited Partner Units) (Details)	12 Months Ended
	Jul. 31, 2011		Jul. 31, 2010
Equity interest in subsidiarires common units	100.00%
Public Common Unitholders [Member]
Limited partners units owned	51,285,212	[1]	44,840,677	[1]
Ferrell Companies [Member]
Limited partners units owned	20,080,776	[2]	20,080,776	[2]
Equity interest in subsidiarires common units	26.00%
FCI Trading Corp. [Member]
Limited partners units owned	195,686	[3]	195,686	[3]
Ferrell Propane [Member]
Limited partners units owned	51,204	[4]	51,204	[4]
James E. Ferrell [Member]
Limited partners units owned	4,353,475	[5]	4,353,475	[5]

[1] These common units are listed on the New York Stock Exchange under the symbol "FGP."

[2] Ferrell Companies is the owner of the general partner and a 26% owner of Ferrellgas Partner's common units and thus a related party.

[3] FCI Trading Corp. ("FCI Trading") is an affiliate of the general partner and thus a related party.

[4] Ferrell Propane, Inc. ("Ferrell Propane") is controlled by the general partner and thus a related party.

[5]