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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Mar. 31, 2015 lb | Oct. 31, 2014 lawsuit | Mar. 31, 2014
Commitments and Contingencies |  |  |
Class action lawsuits (more than 35) |  | 35 ugi_LossContingencyClassActionLawsuit |
Amount of propane in cylinders before reduction | 17 ugi_AmountOfPropaneInCylindersBeforeReduction |  |
Amount of propane in cylinders after reduction | 15 ugi_AmountOfPropaneInCylindersAfterReduction |  |
PNG MGP |  |  |
Commitments and Contingencies |  |  |
Loss contingency, settlement agreement, terms | 2 years |  |
Environmental Matters | CPG MGP |  |  |
Commitments and Contingencies |  |  |
Environmental expenditures cap during calendar year | 1.8 ugi_EnvironmentalExpendituresCapDuringCalendarYear / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_EnvironmentalIssueMember / us-gaap_StatementBusinessSegmentsAxis = ugi_CpgMgpMember |  |
Environmental Matters | PNG MGP |  |  |
Commitments and Contingencies |  |  |
Environmental expenditures cap during calendar year | 1.1 ugi_EnvironmentalExpendituresCapDuringCalendarYear / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_EnvironmentalIssueMember / us-gaap_StatementBusinessSegmentsAxis = ugi_PngMgpMember |  |
Environmental Matters | UGI Utilities |  |  |
Commitments and Contingencies |  |  |
Base year for determination of investigation and remediation cost (in years) | 5 years |  |
CPG and PNG COAs | UGI Utilities |  |  |
Commitments and Contingencies |  |  |
Accrual for environmental loss contingencies | 9.6 us-gaap_AccrualForEnvironmentalLossContingencies / dei_LegalEntityAxis = ugi_UgiUtilitiesMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = ugi_CpgAndPngCoasMember |  | $ 11.1 us-gaap_AccrualForEnvironmentalLossContingencies / dei_LegalEntityAxis = ugi_UgiUtilitiesMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = ugi_CpgAndPngCoasMember

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- Definition Amount of propane in cylinders after reduction. + References No definition available. + Details
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