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Debt - UGI Utilities (Details) - UGI Utilities	12 Months Ended
	Sep. 30, 2016 USD ($)	Oct. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Senior Notes
Debt Instrument
Ratio of Consolidated Debt to Consolidated Total Capital	0.65
2015 UGI Utilities Credit Agreement
Debt Instrument
Ratio of Consolidated Debt to Consolidated Total Capital	0.65
2015 UGI Utilities Credit Agreement | Line of Credit
Debt Instrument
Maximum borrowing capacity	$ 300,000,000
Weighted-average interest rate	1.42%			1.07%
Letters of Credit Outstanding, Amount	$ 2,000,000			$ 2,000,000
2015 UGI Utilities Credit Agreement | Line of Credit | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable rate (percentage)	0.00%
2015 UGI Utilities Credit Agreement | Line of Credit | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable rate (percentage)	1.75%
2015 UGI Utilities Credit Agreement | Letter of Credit
Debt Instrument
Maximum borrowing capacity	$ 100,000,000
2.95% Senior Notes, due 2026 | Senior Notes
Debt Instrument
Aggregate principal amount			$ 100,000,000
Stated interest rate (percentage)	2.95%		2.95%
4.12% Senior Notes, due 2046 | Senior Notes
Debt Instrument
Aggregate principal amount	$ 200,000,000
Stated interest rate (percentage)	4.12%
4.12% Senior Notes, due 2046 | Senior Notes | Subsequent Event
Debt Instrument
Aggregate principal amount		$ 100,000,000
Stated interest rate (percentage)		4.12%
5.75% Senior Notes, due 2016 | Senior Notes
Debt Instrument
Stated interest rate (percentage)				5.75%
7.37% Medium-term Notes, due October 2015 | Medium-term Notes
Debt Instrument
Stated interest rate (percentage)				7.37%
5.64% Medium-term Notes, due December 2015 | Medium-term Notes
Debt Instrument
Stated interest rate (percentage)				5.64%

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