Goodwill And Intangible Assets, Net (Goodwill And Intangible Assets, Net) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Goodwill, gross carrying amount	$ 253,362	$ 248,944
Goodwill, net	253,362	248,944	248,944
Amortizable intangible assets, gross carrying amount	473,766	454,946
Amortizable intangible assets, accumulated amortization	(346,618)	(324,893)
Amortizable intangible assets, net	127,148	130,053
Intangible assets gross excluding goodwill	536,134	514,011
Intangible assets amortization and impairment net excluding goodwill	(346,618)	(324,893)
Intangible assets net excluding goodwill	189,516	189,118
Ferrellgas, L.P. [Member]
Goodwill, gross carrying amount	253,362	248,944
Goodwill, net	253,362	248,944	248,944
Amortizable intangible assets, gross carrying amount	473,766	454,946
Amortizable intangible assets, accumulated amortization	(346,618)	(324,893)
Amortizable intangible assets, net	127,148	130,053
Intangible assets gross excluding goodwill	536,134	514,011
Intangible assets amortization and impairment net excluding goodwill	(346,618)	(324,893)
Intangible assets net excluding goodwill	189,516	189,118
Trade Names And Trademarks [Member]
Indefinite-lived intangible assets (excluding goodwill)	62,368	59,065
Trade Names And Trademarks [Member] | Ferrellgas, L.P. [Member]
Indefinite-lived intangible assets (excluding goodwill)	62,368	59,065
Customer Lists [Member]
Amortizable intangible assets, gross carrying amount	416,620	404,409
Amortizable intangible assets, accumulated amortization	(302,179)	(282,848)
Amortizable intangible assets, net	114,441	121,561
Customer Lists [Member] | Ferrellgas, L.P. [Member]
Amortizable intangible assets, gross carrying amount	416,620	404,409
Amortizable intangible assets, accumulated amortization	(302,179)	(282,848)
Amortizable intangible assets, net	114,441	121,561
Non-Compete Agreements [Member]
Amortizable intangible assets, gross carrying amount	47,974	47,030
Amortizable intangible assets, accumulated amortization	(40,994)	(39,153)
Amortizable intangible assets, net	6,980	7,877
Non-Compete Agreements [Member] | Ferrellgas, L.P. [Member]
Amortizable intangible assets, gross carrying amount	47,974	47,030
Amortizable intangible assets, accumulated amortization	(40,994)	(39,153)
Amortizable intangible assets, net	6,980	7,877
Other Intangible Assets [Member]
Amortizable intangible assets, gross carrying amount	9,172	3,507
Amortizable intangible assets, accumulated amortization	(3,445)	(2,892)
Amortizable intangible assets, net	5,727	615
Other Intangible Assets [Member] | Ferrellgas, L.P. [Member]
Amortizable intangible assets, gross carrying amount	9,172	3,507
Amortizable intangible assets, accumulated amortization	(3,445)	(2,892)
Amortizable intangible assets, net	$ 5,727	$ 615