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Energy Services Accounts Receivable Securitization Facility - Narrative (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 5 Months Ended | 7 Months Ended
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Mar. 31, 2014 Energy Services | Mar. 31, 2013 Energy Services | Mar. 31, 2014 Energy Services Funding Corporation | Mar. 31, 2013 Energy Services Funding Corporation | Oct. 31, 2014 Maximum Forecast | May 31, 2014 Maximum Forecast
Accounts, Notes, Loans and Financing Receivable |  |  |  |  |  |
Receivables facility |  |  |  |  | $ 75 | $ 150
Sale of trade receivables | 551.8 | 524.3 |  |  |  |
Sale of undivided interests in its trade receivables to the commercial paper conduit |  |  | 251.0 | 179.0 |  |
Outstanding balance of trade receivables |  |  | 124.1 | 82.6 |  |
Outstanding balance of trade receivables sold |  |  | $ 10.5 | $ 11.0 |  |

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- Definition Aggregate Trade Receivables Sold to Consolidated Special Purpose Subsidiary + References No definition available. + Details
Name: | ugi_AggregateTradeReceivablesSoldToConsolidatedSpecialPurposeSubsidiary
Namespace Prefix: | ugi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Outstanding balance of ESFC trade receivables. + References No definition available. + Details
Name: | ugi_OutstandingBalanceOfEsfcTradeReceivables
Namespace Prefix: | ugi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Receivable purchase facility size. + References No definition available. + Details
Name: | ugi_ReceivablePurchaseFacility
Namespace Prefix: | ugi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Trade receivables sold to commercial paper conduit. + References No definition available. + Details
Name: | ugi_TradeReceivablesSoldToCommercialPaperConduit
Namespace Prefix: | ugi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Proceeds from securitizations of receivables treated as collateralized borrowings, which are classified as financing transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromAccountsReceivableSecuritization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration