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v3.20.2

Nature of Operations (Details) $ in Millions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 21, 2019 USD ($) shares | Aug. 20, 2019 | Aug. 01, 2019 shares | Sep. 30, 2020 county | Sep. 30, 2019 shares
Investment [Line Items] |  |  |  |  |
Number of counties of operation | county |  |  |  | 1 |
AmeriGas Propane | AmeriGas Partners |  |  |  |  |
Investment [Line Items] |  |  |  |  |
General Partner held a general partner interest in AmeriGas Partners (as a percentage) |  | 1.00% |  |  |
Percentage of limited partnership interest in AmeriGas Partners (as a percentage) |  | 25.50% |  |  |
AmeriGas Propane | AmeriGas OLP |  |  |  |  |
Investment [Line Items] |  |  |  |  |
Effective ownership interest in AmeriGas OLP (as a percentage) |  | 27.00% |  |  |
Merger Sub |  |  |  |  |
Investment [Line Items] |  |  |  |  |
Total cash paid | $ | $ 529 |  |  |  |
Merger Sub | Common Stock |  |  |  |  |
Investment [Line Items] |  |  |  |  |
Consideration paid (in shares) | shares | 34,612,847 |  | 34,613,000 |  | 34,613,000

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