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v3.19.2

Nature of Operations (Details) |  |  |  | 6 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 01, 2019 USD ($) | Jun. 30, 2019 | Apr. 01, 2019 USD ($) $ / shares | Sep. 30, 2019 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) county | Jun. 30, 2018 USD ($)
Investment [Line Items] |  |  |  |  |  |
General Partner incentive distribution |  |  |  |  | $ 34,300,000 | $ 34,000,000.0
Number of counties of operation | county |  |  |  |  | 1 |
AmeriGas Propane | AmeriGas Partners |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
General Partner held a general partner interest in AmeriGas Partners (percentage) |  | 1.00% |  |  | 1.00% |
Percentage of limited partnership interest in AmeriGas Partners (percentage) |  | 25.30% |  |  |  |
General public as limited partner interests in AmeriGas Partners (percentage) |  | 73.70% |  |  | 73.70% |
AmeriGas Propane | AmeriGas OLP |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Effective ownership interest in AmeriGas OLP (percentage) |  | 27.00% |  |  | 27.00% |
Merger Sub |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Dividends declared per common share (in USD per share, no less than) | $ / shares |  |  | $ 0.95 |  |  |
Termination fee payable to parent |  |  | $ 20,000,000 |  |  |
Expense reimbursement amount to parent, maximum |  |  | 5,000,000 |  |  |
Expense reimbursement amount from parent, maximum |  |  | $ 5,000,000 |  |  |
Merger Sub | Forecast |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Proposed consideration |  |  |  | $ 530,000,000 |  |
Subsequent Event | CMG |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Proposed consideration | $ 1,275,000,000 |  |  |  |  |
Common Stock | Merger Sub | Forecast |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Proposed consideration issuable (in shares) | shares |  |  |  | 34,600,000 |  |
Units issuable (in units) | shares |  |  |  | 10,615,711 |  |
Proposed Consideration One | Common Stock | Merger Sub | Forecast |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Number of shares issuable per acquiree stock (in shares) | shares |  |  |  | 0.6378 |  |
Proposed Consideration Two | Common Stock | Merger Sub | Forecast |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Number of shares issuable per acquiree stock (in shares) | shares |  |  |  | 0.500 |  |
Proposed Consideration Two | Cash Without Interest | Merger Sub | Forecast |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Cash issuable per acquiree stock (in dollars per share) | $ / shares |  |  |  | $ 7.63 |  |
Proposed Consideration Three | Cash Without Interest | Merger Sub | Forecast |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |
Cash issuable per acquiree stock (in dollars per share) | $ / shares |  |  |  | $ 35.325 |  |

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