Partnership Organization And Formation (Details) (USD $)	12 Months Ended				12 Months Ended
	Jul. 31, 2012 employee	Jul. 31, 2012 Ferrellgas Partners Finance Corp. [Member] employee	Jul. 31, 2011 Ferrellgas Partners Finance Corp. [Member]	Apr. 08, 1996 Ferrellgas Partners Finance Corp. [Member]	Jul. 31, 2012 Ferrellgas, L.P. [Member] employee	Jul. 31, 2012 Ferrellgas Finance Corp. [Member] employee	Jul. 31, 2011 Ferrellgas Finance Corp. [Member]	Jan. 24, 2003 Ferrellgas Finance Corp. [Member]	Jul. 31, 2012 Ferrell Companies [Member]
Partnership Organization And Formation [Line Items]
Limited partner interest	99.00%				99.00%
Corporation formation proceeds from partnership				$ 1,000				$ 1,000
Corporation formation shares granted to partnership				1,000				1,000
General partner interest in Ferrellgas Partners	1.00%
General partner interest in the operating partnership	1.00%				1.00%
General partner interest in Ferrellgas on a combined basis	2.00%
Equity interest in subsidiary	100.00%				100.00%
Common stock shares outstanding		1,000	1,000			1,000	1,000		21,700,000
Number of employees	0	0			0	0