Goodwill And Intangible Assets, Net (Goodwill And Intangible Assets, Net) (Details) (USD $) In Thousands	Jul. 31, 2011	Jul. 31, 2010
Gross carrying amount	$ 248,944	$ 248,939
Goodwill accumulated amortization
Goodwill, Net	248,944	248,939
Net	204,136	221,057
Ferrellgas, L.P. And Subsidiaries [Member] \| Customer Lists [Member]
Gross carrying amount	398,835	395,682
Accumulated amortization	(263,631)	(244,197)
Net	135,204	151,485
Customer Lists [Member]
Gross carrying amount	398,835	395,682
Accumulated amortization	(263,631)	(244,197)
Net	135,204	151,485
Ferrellgas, L.P. And Subsidiaries [Member] \| Non-Compete Agreements [Member]
Gross carrying amount	46,024	44,341
Accumulated amortization	(37,189)	(35,203)
Net	8,835	9,138
Non-Compete Agreements [Member]
Gross carrying amount	46,024	44,341
Accumulated amortization	(37,189)	(35,203)
Net	8,835	9,138
Ferrellgas, L.P. And Subsidiaries [Member] \| Other [Member]
Gross carrying amount	3,507	3,507
Accumulated amortization	(2,540)	(2,190)
Net	967	1,317
Other [Member]
Gross carrying amount	3,507	3,507
Accumulated amortization	(2,540)	(2,190)
Net	967	1,317
Ferrellgas, L.P. And Subsidiaries [Member] \| Amortized Intangible Assets [Member]
Gross carrying amount	448,366	443,530
Accumulated amortization	(303,360)	(281,590)
Net	145,006	161,940
Amortized Intangible Assets [Member]
Gross carrying amount	448,366	443,530
Accumulated amortization	(303,360)	(281,590)
Net	145,006	161,940
Ferrellgas, L.P. And Subsidiaries [Member] \| Trade Names And Trademarks [Member]
Gross carrying amount	59,130	59,117
Accumulated amortization
Net	59,130	59,117
Trade Names And Trademarks [Member]
Gross carrying amount	59,130	59,117
Accumulated amortization
Net	59,130	59,117
Ferrellgas, L.P. And Subsidiaries [Member] \| Total Intangible Assets, Net [Member]
Gross carrying amount	507,496	502,647
Accumulated amortization	(303,360)	(281,590)
Net	204,136	221,057
Total Intangible Assets, Net [Member]
Gross carrying amount	507,496	502,647
Accumulated amortization	(303,360)	(281,590)
Net	204,136	221,057
Ferrellgas, L.P. And Subsidiaries [Member]
Gross carrying amount	248,944	248,939
Goodwill accumulated amortization
Goodwill, Net	248,944	248,939
Net	$ 204,136	$ 221,057

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details