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Long-term Debt (Details) |  | 1 Months Ended | 3 Months Ended | 4 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May. 29, 2015 EUR (€) | Oct. 31, 2015 EUR (€) | Mar. 31, 2014 | Dec. 31, 2015 | Sep. 30, 2015 EUR (€) | Sep. 30, 2015 EUR (€) | Sep. 30, 2015 USD ($) | Sep. 30, 2015 USD ($) | May. 29, 2015 USD ($) | Mar. 31, 2015 USD ($) | Sep. 30, 2014 USD ($) | Jan. 12, 2012 USD ($)
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 3,699,800,000 |  |  | $ 3,510,800,000 |
Principal repayments due April 30, 2018 |  |  |  |  |  |  |  | 172,800,000 |  |  |  |
Principal repayments due April 30, 2019 |  |  |  |  |  |  |  | 523,000,000 |  |  |  |
Principal repayments due April 30, 2020 |  |  |  |  |  |  |  | 1,091,800,000 |  |  |  |
Pretax loss on early extinguishment of debt |  |  |  |  |  |  | $ 10,300,000 |  |  |  |  |
Interest Rate Swap | Interest Expense |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Loss on interest rate swaps |  |  |  |  |  |  | $ (9,000,000) |  |  |  |  |
AmeriGas Propane |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed debt |  |  |  |  |  |  |  | 1,500,000,000 |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 2,283,500,000 |  |  | $ 2,291,700,000 |
AmeriGas Propane | Senior Notes | 6.75% Senior Notes, due 2020 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 550,000,000
Stated interest rate (percentage) |  |  |  |  | 6.75% | 6.75% |  | 6.75% |  |  | 6.75% | 6.75%
Long-term debt |  |  |  |  |  |  |  | $ 550,000,000 |  |  | $ 550,000,000 |
AmeriGas Propane | Senior Notes | 7.00% Senior Notes, due 2022 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000,000
Stated interest rate (percentage) |  |  |  |  | 7.00% | 7.00% |  | 7.00% |  |  | 7.00% | 7.00%
Long-term debt |  |  |  |  |  |  |  | $ 980,800,000 |  |  | $ 980,800,000 |
AmeriGas Propane | Senior Secured Notes | HOLP Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | 21,000,000 |  |  | 26,500,000 |
Unamortized premium |  |  |  |  |  |  |  | $ 2,500,000 |  |  | 3,100,000 |
Minimum variable rate (percentage) |  |  |  |  |  | 7.89% | 7.89% |  |  |  |  |
Maximum variable rate (percentage) |  |  |  |  |  | 8.87% | 8.87% |  |  |  |  |
Effective interest rate (percentage) |  |  |  |  | 6.75% | 6.75% |  | 6.75% |  |  |  |
France SAS | 2015 Senior Facilities Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Ratio of net debt to EBITDA |  |  |  |  | 3.75 |  |  |  |  |  |  |
Debt instrument term (in days) | 5 years |  |  |  |  |  |  |  |  |  |  |
France SAS | 2015 Senior Facilities Agreement | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate floor (percentage) |  |  |  |  |  | 0.00% | 0.00% |  |  |  |  |
France SAS | 2015 Senior Facilities Agreement | Minimum | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 1.60% | 1.60% |  |  |  |  |
France SAS | 2015 Senior Facilities Agreement | Maximum | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 2.70% | 2.70% |  |  |  |  |
France SAS | 2015 Senior Facilities Agreement | Interest Rate Swap | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Underlying fixed interest rate (percentage) |  |  |  |  | 0.18% | 0.18% |  | 0.18% |  |  |  |
France SAS | 2015 Senior Facilities Agreement | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Ratio of net debt to EBITDA |  |  |  | 3.50 |  |  |  |  |  |  |  |
France SAS | 2011 Senior Facilities Agreement | Interest Expense |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Write off of debt issuance costs |  |  |  |  |  |  | $ 1,300,000 |  |  |  |  |
France SAS | 2011 Senior Facilities Agreement | Interest Rate Swap | Interest Expense |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Loss on interest rate swaps |  |  |  |  |  |  | $ 9,000,000 |  |  |  |  |
France SAS | Revolving Credit Facility | 2015 Senior Facilities Agreement | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) | 2.35% |  |  |  |  |  |  |  |  |  |  |
France SAS | Revolving Credit Facility | 2015 Senior Facilities Agreement | Minimum | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) | 1.45% |  |  |  |  |  |  |  |  |  |  |
France SAS | Revolving Credit Facility | 2015 Senior Facilities Agreement | Maximum | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) | 2.55% |  |  |  |  |  |  |  |  |  |  |
France SAS | Term Loan | 2015 Senior Facilities Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | € 600,000,000 |  |  |  |  |  |  | $ 670,700,000 | $ 659,600,000 |  | 0 |
Principal repayments due April 30, 2018 | € |  |  |  |  | € 60,000,000 | € 60,000,000 |  |  |  |  |  |
Principal repayments due April 30, 2019 | € |  |  |  |  | 60,000,000 | 60,000,000 |  |  |  |  |  |
Principal repayments due April 30, 2020 | € |  |  |  |  | € 480,000,000 | € 480,000,000 |  |  |  |  |  |
France SAS | Term Loan | 2015 Senior Facilities Agreement | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate (percentage) |  |  |  |  | 2.70% | 2.70% |  | 2.70% |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 2.50% | 2.50% |  |  |  |  |
France SAS | Term Loan | 2011 Senior Facilities Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Pretax loss on early extinguishment of debt |  |  |  |  |  |  | $ 10,300,000 |  |  |  |  |
France SAS | Line of Credit | Revolving Credit Facility | 2015 Senior Facilities Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | € | € 60,000,000 |  |  |  |  |  |  |  |  |  |  |
France SAS | AGZ Holding | 2011 Senior Facilities Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt | € |  |  |  |  |  | € 342,000,000 |  |  |  |  |  |
Flaga | Term Loan | Minimum | One to Twelve Month EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 1.125% | 1.125% |  |  |  |  |
Flaga | Term Loan | Maximum | One to Twelve Month EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 2.275% | 2.275% |  |  |  |  |
Flaga | Term Loan | Interest Rate Swap | One to Twelve Month EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 2.68% | 2.68% |  |  |  |  |
Flaga | Term Loan | Flaga Term Loan, due through August 2016 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  | € 26,700,000 | € 26,700,000 |  | $ 29,800,000 |  |  | 50,500,000 |
Flaga | Term Loan | Flaga Term Loan, due through August 2016 | One to Twelve Month EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate (percentage) |  |  |  |  | 4.21% | 4.21% |  | 4.21% |  |  |  |
Flaga | Term Loan | Flaga Euro-based Term Loan Due Through September 2016 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  | € 13,300,000 | € 13,300,000 |  | $ 14,900,000 |  |  |  |
Flaga | Term Loan | Flaga Term Loan, due September 2016 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 52,000,000 |  |  | 52,000,000 |
Flaga | Term Loan | Flaga Term Loan, due September 2016 | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate (percentage) |  |  |  |  | 1.82% | 1.82% |  | 1.82% |  |  |  |
Flaga | Term Loan | Flaga Term Loan, due September 2016 | One to Twelve Month EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate (percentage) |  |  |  |  | 4.25% | 4.25% |  | 4.25% |  |  |  |
Flaga | Term Loan | Flaga Term Loan, due September 2018 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 59,100,000 |  |  | 0 |
Flaga | Term Loan | Flaga Term Loan, due September 2018 | One-Month LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 1.125% | 1.125% |  |  |  |  |
Flaga | Term Loan | Flaga Term Loan, due September 2018 | Cross Currency Contracts | One-Month LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate (percentage) |  |  |  |  | 0.87% | 0.87% |  | 0.87% |  |  |  |
Flaga | Term Loan | Flaga Term Loan, due October 2016 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  | € 19,100,000 | € 19,100,000 |  | $ 21,400,000 |  |  | $ 24,100,000 |
Effective interest rate (percentage) |  |  |  |  | 3.40% | 3.40% |  | 3.40% |  |  | 3.40% |
Flaga | Term Loan | Flaga Term Loan, due October 2016 | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 1.175% | 1.175% |  |  |  |  |
Flaga | Term Loan | Flaga Term Loan, due October 2016 | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  |  |  |  |  | 2.525% | 2.525% |  |  |  |  |
Flaga | Term Loan | Flaga Term Loan, due October 2016 | Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Underlying fixed interest rate (percentage) |  |  |  |  | 1.79% | 1.79% |  | 1.79% |  |  |  |
Flaga | Term Loan | Flaga Credit Facility Agreement | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | € |  | € 45,800,000.0 |  |  |  |  |  |  |  |  |  |
Flaga | Term Loan | Flaga Credit Facility Agreement | Subsequent Event | Minimum | Three-Month EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  | 0.40% |  |  |  |  |  |  |  |  |  |
Flaga | Term Loan | Flaga Credit Facility Agreement | Subsequent Event | Maximum | Three-Month EURIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percentage) |  | 1.80% |  |  |  |  |  |  |  |  |  |
UGI Utilities |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 622,000,000 |  |  | $ 642,000,000 |
UGI Utilities | Senior Notes | 4.98% Senior Notes, due March 2044 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (percentage) |  |  |  |  |  |  |  |  |  | 4.98% |  |
Long-term debt |  |  |  |  |  |  |  |  |  | $ 175,000,000 |  |
Debt instrument term (in days) |  |  | 364 days |  |  |  |  |  |  |  |  |
Ratio of Consolidated Debt to Consolidated Total Capital |  |  |  |  |  | 0.65 | 0.65 |  |  |  |  |
Amount of net assets restricted from transfer to parent company under different agreements |  |  |  |  |  |  |  | $ 1,700,000,000 |  |  |  |

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