Public Utilities, Approved Rate, Property, Plant and Equipment, Net Threshold

No definition available.

Name:	ugi_PublicUtilitiesApprovedRatePropertyPlantAndEquipmentNetThreshold
Namespace Prefix:	ugi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Public Utilities, Regulatory Proceeding, Duration

+ References

No definition available.

+ Details

Name:	ugi_PublicUtilitiesRegulatoryProceedingDuration
Namespace Prefix:	ugi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Public Utilities Requested Rate Change, Capital Investment Costs

+ References

No definition available.

+ Details

Name:	ugi_PublicUtilitiesRequestedRateChangeCapitalInvestmentCosts
Namespace Prefix:	ugi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Public Utilities, Requested Rate Change, Capital Investments

+ References

No definition available.

+ Details

Name:	ugi_PublicUtilitiesRequestedRateChangeCapitalInvestments
Namespace Prefix:	ugi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Public Utilities Requested Rate Change, Requested Rate Increase (Decrease), Revenue

+ References

No definition available.

+ Details

Name:	ugi_PublicUtilitiesRequestedRateChangeRequestedRateIncreaseDecreaseRevenue
Namespace Prefix:	ugi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of allowable costs capitalized during the period by the entity pertaining to Phase-In plans which were deferred on the expectation of future recovery.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481878/980-340-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481907/980-340-45-1

+ Details

Name:	us-gaap_PhaseInPlanAmountOfCostsDeferredForRateMakingPurposes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of public utility's approved rate increase (decrease) by regulatory agency.

+ References

No definition available.

+ Details

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

- Definition

Percentage of public utility's approved rate increase (decrease) by regulatory agency.

+ References

No definition available.

+ Details

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

- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

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

- Definition

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.

+ Details

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

- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(7)(c)(3))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(7)(c)(5))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(7)(c)(6))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(7)(c)(7))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5A
-Subparagraph (SX 210.12-13A(Column F))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-5A

+ Details

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

- Details

Name:	us-gaap_RegulatoryAgencyAxis=ugi_PublicServiceCommissionOfWestVirginiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_RegulatoryAgencyAxis=ugi_PennsylvaniaPublicUtilityCommissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_JointPetitionForApprovalOfSettlementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_JointPetitionForApprovalOfSettlementPhaseIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_JointPetitionForApprovalOfSettlementPhaseIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_WeatherNormalizationAdjustmentRiderMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_A2023InfrastructureReplacementAndExpansionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_A2023InfrastructureReplacementAndExpansionPlanCapitalImprovement2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_A2023InfrastructureReplacementAndExpansionPlanCapitalImprovements2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_NetRevenueIncreaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_BaseRateCaseBaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_BaseRateCaseInfrastructureRiderMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_A2022IREPFor20232027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_A2022IREPFor2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_A2023IREPRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=ugi_A2021IREPRecoveryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Utility Regulatory Assets and Liabilities and Regulatory Matters - Narrative (Details) - USD ($) $ in Thousands												9 Months Ended		12 Months Ended
	Jul. 31, 2023	Jul. 14, 2023	Mar. 06, 2023	Jan. 27, 2023	Nov. 16, 2022	Nov. 01, 2022	Sep. 15, 2022	Jul. 29, 2022	Jan. 28, 2022	Nov. 09, 2021	Feb. 08, 2021	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2022	Dec. 01, 2022
Regulatory Assets
Net unrealized gains												$ (1,866,000)	$ 372,000
Pilot program duration						5 years
WVPSC
Regulatory Assets
Under-recovery of gas cost															$ 12,000
Gas Utility
Regulatory Assets
Net unrealized gains												$ (7,000)	$ 7,000	$ 5,000
Gas Utility \| PAPUC
Regulatory Assets
Requested rate increase (decrease)									$ 83,000
Gas Utility \| PAPUC \| Joint Petition
Regulatory Assets
Requested rate increase (decrease)							$ 49,000
Approved rate						3.00%
Property, plant and equipment, net threshold						$ 3,368
Gas Utility \| PAPUC \| Beginning October 29, 2022
Regulatory Assets
Requested rate increase (decrease)							38,000
Gas Utility \| PAPUC \| Beginning October 1, 2023
Regulatory Assets
Requested rate increase (decrease)							$ 11,000
Gas Utility \| PAPUC \| Weather Normalization Adjustment Rider
Regulatory Assets
Approved rate						3.00%
Utilities \| PAPUC
Regulatory Assets
Requested rate increase (decrease)				$ 11,000							$ 9,000
Approved rate increase										$ 6,000
Utilities \| PAPUC \| Subsequent event
Regulatory Assets
Requested rate increase (decrease)		$ 9,000
Mountaineer \| WVPSC \| 2023 IREP Recovery \| Subsequent event
Regulatory Assets
Requested rate increase (decrease)	$ 10,000
Public Utilities Requested Rate Change, Requested Rate Increase (Decrease), Revenue	(12,000)
Public Utilities, Requested Rate Change, Capital Investments	383,000
Mountaineer \| WVPSC \| 2023 IREP \| Subsequent event
Regulatory Assets
Public Utilities Requested Rate Change, Capital Investment Costs	131,000
Mountaineer \| WVPSC \| 2023 IREP For 2024 \| Subsequent event
Regulatory Assets
Public Utilities Requested Rate Change, Capital Investment Costs	$ 67,000
Mountaineer \| WVPSC \| Net Revenue Increase
Regulatory Assets
Requested rate increase (decrease)			$ 20,000
Mountaineer \| WVPSC \| Base Rate Case, Base Rate
Regulatory Assets
Requested rate increase (decrease)			38,000
Mountaineer \| WVPSC \| Base Rate Case, Infrastructure Rider
Regulatory Assets
Requested rate increase (decrease)			$ (18,000)
Mountaineer \| WVPSC \| Over 2023 - 2027
Regulatory Assets
Requested rate increase (decrease)								$ 354,000
Mountaineer \| WVPSC \| Calendar Year 2023
Regulatory Assets
Requested rate increase (decrease)								$ 64,000
Mountaineer \| WVPSC \| 2023 IREP Revenue
Regulatory Assets
Requested rate increase (decrease)					$ 22,000
Mountaineer \| WVPSC \| 2021 IREP
Regulatory Assets
Requested rate increase (decrease)					$ 1,000