Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Balance Sheets) (Details) (USD $)	Jul. 31, 2013	Jul. 31, 2012
ASSETS
Cash and cash equivalents	$ 6,464,000	$ 8,429,000
Prepaid expenses and other current assets	25,608,000	29,315,000
Other assets, net	42,444,000	43,320,000
Total assets	1,356,028,000	1,397,279,000
LIABILITIES AND PARTNERS' CAPITAL (DEFICIT)
Other current liabilities	121,102,000	122,667,000
Long-term debt	1,106,940,000	1,059,085,000
Partners' capital (deficit)
Common unitholders	(28,931,000)	43,701,000
General partner unitholder	(60,362,000)	(59,630,000)
Accumulated other comprehensive income (loss)	1,697,000	(13,159,000)
Total Ferrellgas Partners, L.P. partners' capital (deficit)	(87,596,000)	(29,088,000)
Total liabilities and partners' capital (deficit)	1,356,028,000	1,397,279,000
Parent Company [Member]
ASSETS
Cash and cash equivalents	157,000	211,000
Prepaid expenses and other current assets	26,000	40,000
Investment in Ferrellgas, L.P.	93,507,000	151,578,000
Other assets, net	2,913,000	3,366,000
Total assets	96,603,000	155,195,000
LIABILITIES AND PARTNERS' CAPITAL (DEFICIT)
Other current liabilities	2,199,000	2,283,000
Long-term debt	182,000,000	182,000,000
Partners' capital (deficit)
Common unitholders	(28,931,000)	43,701,000
General partner unitholder	(60,362,000)	(59,630,000)
Accumulated other comprehensive income (loss)	1,697,000	(13,159,000)
Total Ferrellgas Partners, L.P. partners' capital (deficit)	(87,596,000)	(29,088,000)
Total liabilities and partners' capital (deficit)	$ 96,603,000	$ 155,195,000