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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of equity impact of cash distribution declared to unit-holder of limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Date of declaration for distribution of cash or unit to limited partner of limited partnership (LP), in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Date of distribution for distribution of cash or unit to limited partner of limited partnership (LP), in CCYY-MM-DD format.

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- Definition

Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP).

+ References

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

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- Definition

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

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- Definition

The number of limited partner units outstanding.

+ References

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- Definition

The value of the noncash (or part noncash) consideration given (for example, liability, equity) in a transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of a transaction not resulting in cash receipts or cash payments in the period.

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- Definition

The cash inflow from the capital received in cash from a partner in a partnership during the period.

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Partners' Capital (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	6 Months Ended		12 Months Ended
	Mar. 17, 2017	Feb. 23, 2017	Jan. 31, 2017	Jan. 31, 2017	Jan. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Capital Unit [Line Items]
Limited Partners' Capital Account, Units Outstanding			97,152,665	97,152,665			98,002,665
Cash distributions declared per common unit						$ 0.40
General partner ownership interest				1.00%
Contributions from partners				$ 0	$ 32
Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
Cash distributions declared per common unit						$ 0.40	$ 2.05
Cash contributions from limited partner			$ 165,900
General partner ownership interest				1.00%
Contributions from partners				$ 167,640	30
General Partner [Member]
Capital Unit [Line Items]
Cash contributions from limited partner			$ 1,700
JEF Capital Management [Member]
Capital Unit [Line Items]
Limited Partners' Capital Account, Units Outstanding			4,758,859	4,758,859
Ferrell Resources Holdings, Inc. [Member]
Capital Unit [Line Items]
Limited Partners' Capital Account, Units Outstanding			4,616	4,616
FCI Trading Corp. [Member]
Capital Unit [Line Items]
Limited Partners' Capital Account, Units Outstanding			195,686	195,686			195,686
General Partner [Member]
Capital Unit [Line Items]
General partner ownership interest				2.00%
Contributions from partners				$ 1,700
Non-cash contributions				$ 200	300
General Partner [Member] \| Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
General partner ownership interest				1.0101%
Contributions from partners				$ 1,700
Non-cash contributions				$ 100	$ 100
Ferrell Propane, Inc [Member]
Capital Unit [Line Items]
Limited Partners' Capital Account, Units Outstanding			51,204	51,204			51,204
Ferrell Companies Beneficial Ownership [Member]
Capital Unit [Line Items]
Limited partner ownership interest				23.40%
Ferrell Companies [Member]
Capital Unit [Line Items]
Limited partner ownership interest				23.00%
Subsequent Event [Member]
Capital Unit [Line Items]
Cash distribution declaration date		Feb. 23, 2017
Cash distributions declared per common unit		$ 0.10					$ 2.05
Cash distributions payment date	Mar. 17, 2017
Subsequent Event [Member] \| Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
Cash distribution declaration date		Feb. 23, 2017
Cash distributions payment date	Mar. 17, 2017
Subsequent Event [Member] \| FCI Trading Corp. [Member]
Capital Unit [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared		$ 20
Subsequent Event [Member] \| Ferrellgas Partners [Member] \| Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared		9,800
Subsequent Event [Member] \| General Partner [Member]
Capital Unit [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared		98
Subsequent Event [Member] \| General Partner [Member] \| Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared		100
Subsequent Event [Member] \| Ferrell Propane, Inc [Member]
Capital Unit [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared		5
Subsequent Event [Member] \| Ferrell Companies [Member]
Capital Unit [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared		$ 2,253