Number of persons employed by the Entity

No definition available.

Name:	dei_EntityNumberOfEmployees
Namespace Prefix:	dei_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

General Partner Interest

+ References

No definition available.

+ Details

Name:	fgp_GeneralPartnerInterest
Namespace Prefix:	fgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the general partner's interest in the operating partnership.

+ References

No definition available.

+ Details

Name:	fgp_GeneralPartnerInterestInOperatingPartnership
Namespace Prefix:	fgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

General Partner Interest on a Combined Basis

+ References

No definition available.

+ Details

Name:	fgp_GeneralPartnerInterestOnCombinedBasis
Namespace Prefix:	fgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Entity Subsidiaries

+ References

No definition available.

+ Details

Name:	fgp_NumberOfEntitySubsidiaries
Namespace Prefix:	fgp_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	fgp_PartnershipOrganizationAndFormationLineItems
Namespace Prefix:	fgp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Subsidiary Or Equity Method Investee Cumulative Percentage Ownership After All Transactions And Including Beneficial Ownership

+ References

No definition available.

+ Details

Name:	fgp_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactionsAndIncludingBeneficialOwnership
Namespace Prefix:	fgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 22

-Article 12

+ Details

Name:	us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section H

+ Details

Name:	us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Partnership Organization And Formation (Details)	6 Months Ended			6 Months Ended			6 Months Ended
Partnership Organization And Formation (Details)	Jan. 31, 2013	Jan. 31, 2013 Ferrellgas Partners Finance Corp. [Member]	Jul. 31, 2012 Ferrellgas Partners Finance Corp. [Member]	Jan. 31, 2013 Ferrellgas, L.P. [Member]	Jan. 31, 2013 Ferrellgas Finance Corp. [Member]	Jul. 31, 2012 Ferrellgas Finance Corp. [Member]	Jan. 31, 2013 Ferrell Companies [Member]
Partnership Organization And Formation [Line Items]
Limited partner interest	99.00%			99.00%
Common stock shares outstanding		1,000	1,000		1,000	1,000	21,700,000
Subsidiary Or Equity Method Investee Cumulative Percentage Ownership After All Transactions And Including Beneficial Ownership							27.00%
General partner interest in Ferrellgas Partners	1.00%
General partner interest in the operating partnership	1.00%			1.00%
General partner interest in Ferrellgas on a combined basis	2.00%
Number of subsidiaries	2
Equity interest in subsidiary	100.00%			100.00%
Number of employees	0	0		0
Number of states in which operating partnership serves	50			50