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v3.20.4

Commitments and Contingencies (Details) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) subsidiary | Dec. 31, 2017 USD ($) record_of_decision | Dec. 31, 2008 lb | Dec. 31, 2007 lb | Sep. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
Loss Contingencies |  |  |  |  |  |
Environmental expenditures cap during calendar year | $ 5,000,000 |  |  |  |  |
Amount of propane in cylinders before reduction (in pounds) | lb |  |  |  | 17 |  |
Amount of propane in cylinders after reduction (in pounds) | lb |  |  | 15 |  |  |
CPG, PNG and UGI Gas COAs |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |
Accrual for environmental loss contingencies | $ 49,000,000 |  |  |  | $ 53,000,000 | $ 50,000,000
UGI Utilities | PNG and CPG |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |
Number of subsidiaries acquired with similar histories | subsidiary | 2 |  |  |  |  |
AmeriGas OLP | Saranac Lake, New York | New York State Department of Environment Conservation Remediation Plan |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |
Accrual for environmental loss contingencies | $ 8,000,000 |  |  |  |  |
Loss contingency, number of remediation plans | record_of_decision |  | 3 |  |  |  |
Estimated remediation plan cost |  | $ 28,000,000 |  |  |  |

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