Debt - Schedule of Short-term Debt (Footnotes) (Details) - USD ($)	1 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Sep. 30, 2021	Sep. 01, 2021	Sep. 30, 2020
Subsequent Event
Short-term Debt [Line Items]
Repayment of debt	$ 70,000,000
AmeriGas OLP
Short-term Debt [Line Items]
Maximum borrowing capacity			$ 600,000,000		$ 600,000,000
Energy Services
Short-term Debt [Line Items]
Maximum borrowing capacity			260,000,000		260,000,000
UGI Utilities, Inc.
Short-term Debt [Line Items]
Maximum borrowing capacity			350,000,000		350,000,000
Mountaineer
Short-term Debt [Line Items]
Maximum borrowing capacity			100,000,000	$ 100,000,000
UGI Corporation
Short-term Debt [Line Items]
Maximum borrowing capacity			300,000,000		$ 300,000,000
Line of Credit | AmeriGas OLP | Letter of Credit | AmeriGas OLP Credit Agreement
Short-term Debt [Line Items]
Maximum borrowing capacity			150,000,000
Line of Credit | Energy Services | Letter of Credit | Energy Services Credit Agreement
Short-term Debt [Line Items]
Maximum borrowing capacity			50,000,000
Line of Credit | UGI Utilities, Inc. | Letter of Credit | UGI Utilities, Inc. Credit Agreement
Short-term Debt [Line Items]
Maximum borrowing capacity			100,000,000
Line of Credit | Mountaineer | Letter of Credit | Mountaineer Credit Agreement
Short-term Debt [Line Items]
Maximum borrowing capacity			20,000,000
Line of Credit | UGI Corporation | 2021 UGI Corporation Senior Credit Facility
Short-term Debt [Line Items]
Repayment of debt		$ 30,000,000
Line of Credit | UGI Corporation | 2021 UGI Corporation Senior Credit Facility | Subsequent Event
Short-term Debt [Line Items]
Repayment of debt	$ 70,000,000
Line of Credit | UGI Corporation | Letter of Credit | 2021 UGI Corporation Senior Credit Facility
Short-term Debt [Line Items]
Maximum borrowing capacity			$ 10,000,000