Property, Plant and Equipment, Net Threshold

No definition available.

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

- Definition

Public Utilities, Rate Period

+ References

No definition available.

+ Details

Name:	ugi_PublicUtilitiesRatePeriod
Namespace Prefix:	ugi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Weather Condition, Rate

+ References

No definition available.

+ Details

Name:	ugi_PublicUtilitiesWeatherConditionRate
Namespace Prefix:	ugi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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

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

Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_RegulatoryAssetAmortizationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

+ Details

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

- 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_AnnualBaseDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

Utility Regulatory Assets and Liabilities and Regulatory Matters - Narrative (Details) - USD ($) $ in Thousands								3 Months Ended	9 Months Ended
	Jun. 24, 2022	Jan. 28, 2022	Nov. 09, 2021	Apr. 01, 2021	Feb. 08, 2021	Oct. 08, 2020	Jan. 28, 2020	Dec. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Regulatory Assets
Net unrealized gains (losses)									$ 372,000	$ 509,000
Gas Utility
Regulatory Assets
Net unrealized gains (losses)								$ 35,000	$ 7,000	$ 9,000
Gas Utility \| PAPUC
Regulatory Assets
Requested rate increase		$ 83,000					$ 75,000
Property, plant and equipment, net threshold				$ 2,875,000
Amortization period				10 years
Gas Utility \| PAPUC \| Joint Petition
Regulatory Assets
Requested rate increase	$ 49,000
Rate period		5 years
Weather condition rate		3.00%
Property, plant and equipment, net threshold		$ 3,368
Gas Utility \| PAPUC \| Phase I
Regulatory Assets
Requested rate increase	38,000
Gas Utility \| PAPUC \| Phase II
Regulatory Assets
Requested rate increase	$ 11,000
Gas Utility \| PAPUC \| Annual Base Distribution
Regulatory Assets
Approved rate increase						$ 20,000
Gas Utility \| PAPUC \| Beginning January 1, 2021
Regulatory Assets
Approved rate increase						10,000
Gas Utility \| PAPUC \| Beginning July 1, 2021
Regulatory Assets
Approved rate increase						$ 10,000
Electric Utility \| PAPUC
Regulatory Assets
Requested rate increase					$ 9,000
Electric Utility \| PAPUC \| Joint Petition
Regulatory Assets
Requested rate increase			$ 6,000