Debt - Schedule of Short-term Debt (Details)	Sep. 30, 2017 EUR (€)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 EUR (€)	Sep. 30, 2016 USD ($)
AmeriGas OLP
Short-term Debt
Total Capacity		$ 525,000,000		$ 525,000,000
Borrowings Outstanding		140,000,000		153,200,000
Letters of Credit and Guarantees Outstanding		67,200,000		67,200,000
Available Borrowing Capacity		$ 317,800,000		$ 304,600,000
Weighted Average Interest Rate - End of Year	3.74%	3.74%	2.79%	2.79%
France SAS
Short-term Debt
Total Capacity | €	€ 60,000,000		€ 60,000,000
Borrowings Outstanding | €	0		0
Letters of Credit and Guarantees Outstanding | €	0		0
Available Borrowing Capacity | €	60,000,000		60,000,000
Flaga
Short-term Debt
Total Capacity | €	55,000,000		55,000,000
Borrowings Outstanding | €	0		0
Letters of Credit and Guarantees Outstanding | €	6,500,000		9,600,000
Available Borrowing Capacity | €	€ 48,500,000		€ 45,400,000
Energy Services, LLC
Short-term Debt
Total Capacity		$ 240,000,000		$ 240,000,000
Borrowings Outstanding		0		0
Letters of Credit and Guarantees Outstanding		0		0
Available Borrowing Capacity		240,000,000		240,000,000
UGI Utilities
Short-term Debt
Total Capacity		300,000,000		300,000,000
Borrowings Outstanding		170,000,000		112,500,000
Letters of Credit and Guarantees Outstanding		2,000,000		2,000,000
Available Borrowing Capacity		$ 128,000,000		$ 185,500,000
Weighted Average Interest Rate - End of Year	2.11%	2.11%	1.42%	1.42%