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Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 18, 2018 | Sep. 30, 2017 | Sep. 30, 2018
Derivative |  |  |
Amount of net losses associated with interest rate hedges to be reclassified with interest rate hedges during the next 12 months |  |  | $ 3,500,000
Amount of net losses associated with currency rate risk to be reclassified into earnings during the next 12 months |  |  | (1,100,000)
Restricted cash in brokerage accounts |  | $ 10,300,000 | 9,600,000
Amounts of derivative losses representing ineffectiveness |  | 5,500,000 |
IRPA |  |  |
Derivative |  |  |
Notional amount |  | 0 | 0
Foreign Currency Contracts |  |  |
Derivative |  |  |
Notional amount |  | 424,800,000 | 512,200,000
Foreign Currency Contracts | Net Investment Hedging |  |  |
Derivative |  |  |
Notional amount |  | $ 0 | $ 0
Line of Credit | Subsequent Event | UGI International LLC | Revolving Credit Facility | UGI International Credit Agreement | EURIBOR |  |  |
Derivative |  |  |
Basis spread on variable rate (percentage) | 1.70% |  |
Derivative, fixed interest rate | 0.34% |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of gain (loss) from the ineffectiveness of the hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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- Definition The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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