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Derivative Instruments and Hedging Activities - Narrative (Details) € in Millions |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2016 USD ($) | Mar. 31, 2016 EUR (€) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2017 EUR (€) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 EUR (€) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 EUR (€)
Derivative |  |  |  |  |  |  |  |  |  |
Settlement of UGI Utilities interest rate protection agreements |  |  | $ 0 | $ (36,000,000) | $ 0 |  |  |  |  |
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 |  |  |  |  |  |  | 900,000 |  |  |
Restricted cash in brokerage accounts |  |  |  |  |  |  | 10,300,000 |  | $ 15,600,000 |
Amounts of derivative losses representing ineffectiveness |  |  |  | $ 5,500,000 |  |  |  |  |  |
Interest Rate Swaps |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Notional amount | € |  |  |  |  |  | € 645.8 |  | € 645.8 |  |
Interest Rate Swaps | Interest Expense |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Loss on interest rate swaps |  |  |  |  | $ 9,000,000 |  |  |  |  |
IRPA |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  | 0 |
Foreign Currency Contracts |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 424,800,000 |  | 314,300,000 |
Foreign Currency Contracts | Net Investment Hedging |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | $ 0 |  | $ 0 |
UGI France |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Derivative interest rate floor |  | 0.00% |  |  |  |  |  |  |  |
UGI France | Interest Rate Swaps |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Payment to interest rate swap counterparties | € |  | € 7.7 |  |  |  |  |  |  |  |
UGI France | Interest Rate Swaps | EURIBOR |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Underlying fixed interest rate (percentage) |  | 0.18% |  |  |  |  |  |  |  |
UGI France | Interest Rate Swaps | Term Loan |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Notional amount | € |  | € 600.0 |  |  |  |  |  |  |  | € 600.0
UGI Utilities | IRPA |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Settlement of UGI Utilities interest rate protection agreements | $ 36,000,000 |  |  |  |  |  |  |  |  |

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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 Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + 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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- Definition The amount of cash or securities placed with a broker or counterparty as security for a trading or derivatives securities position which was partially obtained with funds provided by the broker dealer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8,17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow for derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3505-108585 + Details
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