XML 46 R35.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Nature of Operations (Details) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2017 USD ($) county | Dec. 31, 2016 USD ($)
Investment [Line Items] |  |
General Partner incentive distribution | $ | $ 11.3 | $ 10.4
Number of counties of operation | county | 1 |
Amerigas Propane | AmeriGas Partners |  |
Investment [Line Items] |  |
General Partner held a general partner interest in AmeriGas Partners | 1.00% |
Percentage of limited partnership interest in AmeriGas Partners | 25.30% |
General public as limited partner interests in AmeriGas Partners | 73.70% |
Amerigas Propane | AmeriGas OLP |  |
Investment [Line Items] |  |
Effective ownership interest in AmeriGas OLP | 27.00% |

X
- Definition Line items represent reporting 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 12 -Sentence Column A + Details
Name: | invest_InvestmentLineItems
Namespace Prefix: | invest_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Counties Of Operation, Number + References No definition available. + Details
Name: | ugi_CountiesOfOperationNumber
Namespace Prefix: | ugi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition General partners effective ownership percentage in related parties. + References No definition available. + Details
Name: | ugi_GeneralPartnersEffectiveOwnershipPercentageInRelatedParties
Namespace Prefix: | ugi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Subsidiary percentage common units owned by public. + References No definition available. + Details
Name: | ugi_SubsidiaryPercentageCommonUnitsOwnedByPublic
Namespace Prefix: | ugi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of incentive obligation paid in cash or stock during the period to a limited liability corporation managing member or limited partnership general partner. + 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=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_IncentiveDistributionDistributionPerYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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://www.xbrl.org/2003/role/presentationRef -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: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=ugi_AmerigasPropaneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OwnershipAxis=ugi_AmeriGasPartnersL.P.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OwnershipAxis=ugi_AmeriGasOLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |