XML 137 R116.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Commitments and Contingencies - Contingencies (Details) $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2017 USD ($) record_of_decision | Oct. 31, 2014 lawsuit | Sep. 30, 2017 USD ($) subsidiary lb | Sep. 30, 2016 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Class action lawsuits (more than) | lawsuit |  | 35 |  |
Amount of propane in cylinders being sold | lb |  |  | 17 |
Reduced amount of propane in cylinders being sold | lb |  |  | 15 |
UGI Utilities | Environmental Issue |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental expenditures cap during calendar year |  |  | $ 2.5 |
CPG MPG | Environmental Issue |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental expenditures cap during calendar year |  |  | 1.8 |
PNG MPG | Environmental Issue |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental expenditures cap during calendar year |  |  | 1.1 |
CPG, PNG and UGI Gas COAs |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Accrued liabilities for environmental investigation and remediation costs related to CPG-COA and PNG-COA |  |  | $ 54.3 | $ 55.1
UGI Utilities | CPG and PNG |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of subsidiaries acquired with similar histories | subsidiary |  |  | 2 |
AmeriGas OLP | Saranac Lake, New York | New York State Department of Environment Conservation Remediation Plan |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Accrued liabilities for environmental investigation and remediation costs related to CPG-COA and PNG-COA |  |  | $ 7.5 |
Number of records of decisions drafted | record_of_decision | 3 |  |  |
Estimated remediation plan cost | $ 27.7 |  |  |

X
- Definition Amount of propane in cylinders being sold. + References No definition available. + Details
Name: | ugi_AmountOfPropaneInCylindersBeingSold
Namespace Prefix: | ugi_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Environmental expenditures cap during calendar year. + References No definition available. + Details
Name: | ugi_EnvironmentalExpendituresCapDuringCalendarYear
Namespace Prefix: | ugi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss Contingency Class Action Lawsuit + References No definition available. + Details
Name: | ugi_LossContingencyClassActionLawsuit
Namespace Prefix: | ugi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Number Of Remediation Plans + References No definition available. + Details
Name: | ugi_LossContingencyNumberOfRemediationPlans
Namespace Prefix: | ugi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Subsidiaries Acquired + References No definition available. + Details
Name: | ugi_NumberofSubsidiariesAcquired
Namespace Prefix: | ugi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reduced amount of propane in cylinders being sold. + References No definition available. + Details
Name: | ugi_ReducedAmountOfPropaneInCylindersBeingSold
Namespace Prefix: | ugi_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
Name: | us-gaap_AccrualForEnvironmentalLossContingencies
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=ugi_UGIGasMGPPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_EnvironmentalIssueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=ugi_CpgMgpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=ugi_PngMgpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=ugi_CPGCOA.PNGCOAandUGIGasCOAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ugi_PNGandCPGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=ugi_SaranacLakeNewYorkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnvironmentalRemediationContingencyAxis=ugi_NewYorkStateDepartmentofEnvironmentConservationRemediationPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |