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.

No definition available.

+ Details

Name:	us-gaap_CapitalUnitLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) in partners' capital account for unit-based payment arrangement issued by partnership. Partner includes, but is not limited to, general, limited and preferred partners.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120397183&loc=d3e187085-122770

+ Details

Name:	us-gaap_PartnersCapitalAccountUnitBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_OwnershipAxis=fgp_FerrellgasPartnersLpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_GeneralPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=fgp_FerrellgasLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_LimitedPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=fgp_FerrellgasInc.GeneralPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=fgp_FerrellgasLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Equity (Deficit) - Contributions and AOCI (Details) - USD ($)	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Capital Unit [Line Items]
Contributions in connection with non-cash ESOP compensation charges	$ 3,170,000	$ 3,215,000	$ 2,871,000
Ferrellgas Partners LP [Member]
Capital Unit [Line Items]
General partner ownership interest	2.00%	2.00%
General Partner [Member]
Capital Unit [Line Items]
Contributions in connection with non-cash ESOP compensation charges	$ 31,000	$ 33,000	28,000
Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
Contributions in connection with non-cash ESOP compensation charges	3,170,000	3,215,000	2,871,000
Ferrellgas, L.P. [Member] \| Common Unitholders [Member]
Capital Unit [Line Items]
Contributions in connection with non-cash ESOP compensation charges	3,138,000	3,183,000	2,842,000
Ferrellgas, L.P. [Member] \| General Partner [Member]
Capital Unit [Line Items]
Contributions in connection with non-cash ESOP compensation charges	32,000	32,000	$ 29,000
Ferrellgas Inc., General Partner [Member]
Capital Unit [Line Items]
Contributions in connection with non-cash ESOP compensation charges	$ 63,000.0	$ 65,000.0
Ferrellgas Inc., General Partner [Member] \| Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
General partner ownership interest	1.0101%	1.0101%
Ferrellgas Inc., General Partner [Member] \| Ferrellgas Partners LP [Member]
Capital Unit [Line Items]
General partner ownership interest	1.00%