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Debt - AmeriGas Propane (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Sep. 30, 2016
AmeriGas Partners |  |  |
Debt Instrument |  |  |
Aggregate principal amount of tendered notes redeemed |  |  | $ 1,270,000,000
AmeriGas Partners | Senior Notes | 5.50% due May 2025 |  |  |
Debt Instrument |  |  |
Aggregate principal amount |  | $ 700,000,000 |
Stated interest rate |  | 5.50% |
AmeriGas Partners | Senior Notes | 5.75% due May 2027 |  |  |
Debt Instrument |  |  |
Aggregate principal amount |  | $ 525,000,000 |
Stated interest rate |  | 5.75% |
AmeriGas Partners | Senior Notes | 7.00% Senior Notes |  |  |
Debt Instrument |  |  |
Stated interest rate |  | 7.00% |
Aggregate principal balance repaid |  | $ 980,800,000 |
AmeriGas Partners | Senior Notes | 5.625% due May 2024 |  |  |
Debt Instrument |  |  |
Aggregate principal amount |  |  | $ 675,000,000
Stated interest rate |  |  | 5.625%
AmeriGas Partners | Senior Notes | 5.875% due August 2026 |  |  |
Debt Instrument |  |  |
Aggregate principal amount |  |  | $ 675,000,000
Stated interest rate |  |  | 5.875%
AmeriGas Partners | Senior Notes | 6.50% Senior Notes, due 2021 |  |  |
Debt Instrument |  |  |
Stated interest rate |  |  | 6.50%
AmeriGas Partners | Senior Notes | 6.75% Senior Notes, due 2020 |  |  |
Debt Instrument |  |  |
Stated interest rate |  |  | 6.75%
AmeriGas Partners | Senior Notes | 6.25% Senior Notes, due 2019 |  |  |
Debt Instrument |  |  |
Stated interest rate |  |  | 6.25%
Revolving Credit Facility | Line of Credit | AmeriGas Credit Agreement |  |  |
Debt Instrument |  |  |
Total capacity | $ 600,000,000 |  |
Letter of Credit | Line of Credit | AmeriGas Credit Agreement |  |  |
Debt Instrument |  |  |
Total capacity | $ 150,000,000 |  |
Federal Funds Effective Swap Rate | AmeriGas Credit Agreement |  |  |
Debt Instrument |  |  |
Basis spread on variable rate (percentage) | 0.50% |  |
Minimum | Base Rate | AmeriGas Credit Agreement |  |  |
Debt Instrument |  |  |
Basis spread on variable rate (percentage) | 0.50% |  |
Minimum | Eurodollar | AmeriGas Credit Agreement |  |  |
Debt Instrument |  |  |
Basis spread on variable rate (percentage) | 1.50% |  |
Maximum | Base Rate | AmeriGas Credit Agreement |  |  |
Debt Instrument |  |  |
Basis spread on variable rate (percentage) | 1.75% |  |
Maximum | Eurodollar | AmeriGas Credit Agreement |  |  |
Debt Instrument |  |  |
Basis spread on variable rate (percentage) | 2.75% |  |

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