Fair Value Measurements (Assets And Liabilities Fair Value Hierarchy) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014	Jul. 31, 2014
Interest rate swap assets	$ 2,138	$ 2,101
Propane commodity derivative assets	1,278	7,006
Interest rate swap liabilities	(4,847)	(5,075)
Propane commodity derivative liabilities	(8,241)	(83)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(4,600)	(6,400)
Ferrellgas, L.P. [Member]
Interest rate swap assets	2,138	2,101
Propane commodity derivative assets	1,278	7,006
Interest rate swap liabilities	(4,847)	(5,075)
Propane commodity derivative liabilities	(8,241)	(83)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(4,600)	(6,400)
Level 1 [Member]
Interest rate swap assets
Propane commodity derivative assets
Interest rate swap liabilities
Propane commodity derivative liabilities
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	0	0
Level 1 [Member] \| Ferrellgas, L.P. [Member]
Interest rate swap assets
Propane commodity derivative assets
Interest rate swap liabilities
Propane commodity derivative liabilities
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	0	0
Level 2 [Member]
Interest rate swap assets	2,138	2,101
Propane commodity derivative assets	1,278	7,006
Interest rate swap liabilities	(4,847)	(5,075)
Propane commodity derivative liabilities	(8,241)	(83)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	0	0
Level 2 [Member] \| Ferrellgas, L.P. [Member]
Interest rate swap assets	2,138	2,101
Propane commodity derivative assets	1,278	7,006
Interest rate swap liabilities	(4,847)	(5,075)
Propane commodity derivative liabilities	(8,241)	(83)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	0	0
Level 3 [Member]
Interest rate swap assets
Propane commodity derivative assets
Interest rate swap liabilities
Propane commodity derivative liabilities
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(4,600)	(6,400)
Level 3 [Member] \| Ferrellgas, L.P. [Member]
Interest rate swap assets
Propane commodity derivative assets
Interest rate swap liabilities
Propane commodity derivative liabilities
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	$ (4,600)	$ (6,400)

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611

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- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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- Definition

Fair value as of the balance sheet date of price risk derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets on the balance sheet.

+ References

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- Definition

Fair value as of the balance sheet date of price risk derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities on the balance sheet.

+ References

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