Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Comprehensive income (loss):
Net earnings (loss)	$ (17,796,000)	$ (32,895,000)
Other comprehensive income (loss):
Change in value on risk management derivatives	6,276,000	(2,528,000)
Reclassification of gains and losses of derivatives to earnings	4,191,000	(1,879,000)
Foreign currency translation adjustment	2,000	2,000
Other comprehensive income (loss)	10,469,000	(4,405,000)
Comprehensive income (loss)	(7,327,000)	(37,300,000)
Less: comprehensive income (loss) attributable to noncontrolling interest	(33,000)	(336,000)
Comprehensive income (loss) attributable to Ferrellgas Partners, LP	(7,294,000)	(36,964,000)
Ferrellgas, L.P. [Member]
Comprehensive income (loss):
Net earnings (loss)	(13,692,000)	(28,802,000)
Other comprehensive income (loss):
Change in value on risk management derivatives	6,276,000	(2,528,000)
Reclassification of gains and losses of derivatives to earnings	4,191,000	(1,879,000)
Foreign currency translation adjustment	2,000	2,000
Other comprehensive income (loss)	10,469,000	(4,405,000)
Comprehensive income (loss)	(3,223,000)
Comprehensive income (loss) attributable to Ferrellgas Partners, LP	$ (3,223,000)	$ (33,207,000)