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Commitments and Contingencies (Details) | 6 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 31, 2014 lawsuit | Jun. 30, 2016 USD ($) subsidiary lb | Jun. 30, 2015 USD ($)
Commitments and Contingencies |  |  |
Class action lawsuits (more than) | lawsuit | 35 |  |
Amount of propane in cylinders before reduction (in pounds) | lb |  | 17 |
Amount of propane in cylinders after reduction (in pounds) | lb |  | 15 |
UGI Utilities | Environmental Matters |  |  |
Commitments and Contingencies |  |  |
Base year for determination of investigation and remediation cost (in years) |  | 5 years |
UGI Utilities | CPG and PNG COAs |  |  |
Commitments and Contingencies |  |  |
Accrual for environmental loss contingencies |  | $ 12,200,000 | $ 9,600,000
CPG MGP | Environmental Matters |  |  |
Commitments and Contingencies |  |  |
Environmental expenditures cap during calendar year |  | $ 1,750,000.00 |
PNG MGP |  |  |
Commitments and Contingencies |  |  |
Loss contingency, settlement agreement, terms |  | 2 years |
PNG MGP | Environmental Matters |  |  |
Commitments and Contingencies |  |  |
Environmental expenditures cap during calendar year |  | $ 1,100,000.0 |
UGI Gas MGP Properties | Environmental Matters |  |  |
Commitments and Contingencies |  |  |
Expected environmental expenditures cap during calendar year |  | 2,500,000 |
UGI Gas-COA | UGI Utilities |  |  |
Commitments and Contingencies |  |  |
Accrual for environmental loss contingencies |  | $ 43,800,000 |
PNG and CPG | UGI Utilities |  |  |
Commitments and Contingencies |  |  |
Number of subsidiaries acquired with similar histories | subsidiary |  | 2 |

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