Partnership Organization And Formation (Details)	6 Months Ended						6 Months Ended
	Jan. 31, 2012	Jan. 31, 2012 Ferrellgas, L.P. [Member]	Jan. 31, 2012 Ferrellgas Finance Corp. [Member]	Jul. 31, 2011 Ferrellgas Finance Corp. [Member]	Jan. 31, 2012 Ferrellgas Partners Finance Corp. [Member]	Jul. 31, 2011 Ferrellgas Partners Finance Corp. [Member]	Jan. 31, 2012 Ferrell Companies [Member]
Partnership Organization And Formation [Line Items]
Limited partner interest	99.00%	99.00%
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%					27.00%
Common stock shares outstanding			1,000	1,000	1,000	1,000	21,700,000
Number of employees	0	0	0		0