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Debt (Details)			3 Months Ended		9 Months Ended
Debt (Details)	Jul. 12, 2022 USD ($)	Dec. 07, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Sep. 15, 2022	Jul. 15, 2022 USD ($)	Dec. 07, 2021 EUR (€)
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 0	$ 0	$ 11,000,000	$ 0
Term Loan \| UGI Utilities \| Variable Rate \| Subsequent event
Debt Instrument [Line Items]
Quarterly Installments	$ 2,000,000
Senior Notes \| UGI Utilities \| 4.75% Senior Notes due July 15, 2032 \| Subsequent event
Debt Instrument [Line Items]
Principal amount								$ 90,000,000
Interest rate								4.75%
Senior Notes \| UGI Utilities \| 4.75% Senior Notes due July 15, 2032 \| Expected
Debt Instrument [Line Items]
Principal amount			$ 90,000,000		$ 90,000,000
Interest rate			4.75%		4.75%
Senior Notes \| UGI Utilities \| 4.99% Senior Notes due September 15, 2052 \| Expected
Debt Instrument [Line Items]
Principal amount			$ 85,000,000		$ 85,000,000
Interest rate			4.99%		4.99%
Senior Notes \| UGI Utilities \| 4.99% Senior Notes due September 15, 2052 \| Forecast
Debt Instrument [Line Items]
Interest rate							4.99%
Senior Notes \| Mountaineer \| 4.49% Senior Notes due August 16, 2052 \| Expected
Debt Instrument [Line Items]
Principal amount			$ 40,000,000		$ 40,000,000
Interest rate			4.49%		4.49%
Senior Notes \| UGI International
Debt Instrument [Line Items]
Loss on extinguishment of debt		$ 11,000,000
Senior Notes \| UGI International \| 2.50% Senior Notes due December 1, 2029
Debt Instrument [Line Items]
Principal amount \| €									€ 400,000,000
Interest rate									2.50%
Senior Notes \| UGI International \| 3.25% Senior Notes due November 1, 2025
Debt Instrument [Line Items]
Interest rate									3.25%