Quarterly Data (Unaudited) (Summarized Unaudited Quarterly Data) (Details) (USD $)	3 Months Ended								12 Months Ended
	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Revenues	$ 350,673,000	$ 603,020,000	$ 658,865,000	$ 362,909,000	$ 341,775,000	$ 629,619,000	$ 829,272,000	$ 538,426,000	$ 1,975,467,000	$ 2,339,092,000	$ 2,423,215,000
Gross margin from propane and other gas liquids sales (a)	123,343,000	195,201,000	206,838,000	121,624,000	113,872,000	155,123,000	178,967,000	111,097,000
Net earnings (loss)	(29,060,000)	45,180,000	58,843,000	(17,796,000)	(35,850,000)	21,062,000	36,787,000	(32,895,000)	57,167,000	(10,896,000)	(43,760,000)
Net earnings (loss) attributable to Ferrellgas Partners, L.P.	(28,804,000)	44,681,000	58,207,000	(17,658,000)	(35,529,000)	20,807,000	36,374,000	(32,604,000)	56,426,000	(10,952,000)	(43,648,000)
Common unitholders' interest in net earnings (loss)	(28,516,000)	44,234,000	55,069,000	(17,481,000)	(35,173,000)	20,599,000	36,010,000	(32,278,000)	55,862,000	(10,842,000)	(43,212,000)
Basic and diluted net earnings (loss) per common unitholders' interest	$ (0.36)	$ 0.56	$ 0.70	$ (0.22)	$ (0.45)	$ 0.26	$ 0.47	$ (0.42)	$ 0.71	$ (0.14)	$ (0.60)
Ferrellgas, L.P. [Member]
Revenues	350,673,000	603,020,000	658,865,000	362,909,000	341,775,000	629,619,000	829,272,000	538,426,000	1,975,467,000	2,339,092,000	2,423,215,000
Gross margin from propane and other gas liquids sales (a)	123,343,000	195,201,000	206,838,000	121,624,000	113,872,000	155,123,000	178,967,000	111,097,000
Net earnings (loss)	$ (25,282,000)	$ 49,396,000	$ 62,953,000	$ (13,692,000)	$ (31,746,000)	$ 25,253,000	$ 40,884,000	$ (28,802,000)	$ 73,375,000	$ 5,589,000	$ (11,062,000)