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v3.23.2

Summary of Significant Accounting Policies - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | May 31, 2023
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Impairment of goodwill | $ 656,000,000 |  | $ 0 | $ 656,000,000 | $ 0 |
Goodwill | 3,060,000,000 | $ 3,612,000,000 | 3,671,000,000 | 3,060,000,000 | 3,671,000,000 |
AmeriGas Propane |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Impairment of goodwill | 656,000,000 |  |  |  |  |
Goodwill | $ 1,300,000,000 |  |  | $ 1,300,000,000 |  |
AmeriGas Partners And AmeriGas Finance Corp. | Senior Notes Due 2028 | Senior Notes |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 500,000,000
Interest rate |  |  |  |  |  | 9.375%
Pennant | Energy Services |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity interest acquired |  | 53.00% |  |  |  |
Purchase price |  | $ 61,000,000 |  |  |  |
MBL Bioenergy |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity method investment ownership percent | 99.99% |  |  | 99.99% |  |
Equity method investments | $ 93,000,000 |  | 0 | $ 93,000,000 | 0 |
Pine Run Midstream, LLC |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity method investment ownership percent | 49.00% |  |  | 49.00% |  |
Equity method investments | $ 75,000,000 |  | 67,000,000 | $ 75,000,000 | 67,000,000 |
Pennant | Energy Services |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity method investment ownership percent | 47.00% |  |  | 47.00% |  |
Equity method investments |  |  | 49,000,000 |  | 49,000,000 |
Other equity method investments |  |  |  | $ 50,000,000 |  |
Other equity method investments |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity method investments | $ 84,000,000 |  | $ 44,000,000 | $ 84,000,000 | $ 44,000,000 |

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