Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Balance Sheets) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
ASSETS
Cash and cash equivalents	$ 8,289,000	$ 6,464,000
Prepaid expenses and other current assets	32,071,000	25,608,000
Other assets, net	46,171,000	42,444,000
Total assets	1,572,270,000	1,356,028,000
LIABILITIES AND PARTNERS' CAPITAL (DEFICIT)
Other current liabilities	125,161,000	121,102,000
Long-term debt	1,292,214,000	1,106,940,000
Partners' capital (deficit)
Common unitholders	(57,893,000)	(28,931,000)
General partner unitholder	(60,654,000)	(60,362,000)
Accumulated other comprehensive income (loss)	6,181,000	1,697,000
Total Ferrellgas Partners, L.P. partners' capital (deficit)	(112,366,000)	(87,596,000)
Total liabilities and partners' capital (deficit)	1,572,270,000	1,356,028,000
Parent Company [Member]
ASSETS
Cash and cash equivalents	6,000	157,000
Prepaid expenses and other current assets	0	26,000
Investment in Ferrellgas, L.P.	69,205,000	93,507,000
Other assets, net	2,439,000	2,913,000
Total assets	71,650,000	96,603,000
LIABILITIES AND PARTNERS' CAPITAL (DEFICIT)
Other current liabilities	2,016,000	2,199,000
Long-term debt	182,000,000	182,000,000
Partners' capital (deficit)
Common unitholders	(57,893,000)	(28,931,000)
General partner unitholder	(60,654,000)	(60,362,000)
Accumulated other comprehensive income (loss)	6,181,000	1,697,000
Total Ferrellgas Partners, L.P. partners' capital (deficit)	(112,366,000)	(87,596,000)
Total liabilities and partners' capital (deficit)	$ 71,650,000	$ 96,603,000