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Segment Information - Narrative (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2014 Reportable_Segments
Segment Reporting Information |  |
Number of reportable segments (in reportable segments) |  | 6
Limited Liability Company or Limited Partnership Managing Member or General Partner Ownership Interest Percentage | 1.01% |

X
- Definition Limited liability company or limited partnership managing member or general partner ownership interest percentage. + References No definition available. + Details
Name: | ugi_LimitedLiabilityCompanyOrLimitedPartnershipManagingMemberOrGeneralPartnerOwnershipInterestPercentage
Namespace Prefix: | ugi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration