Debt - Schedule of Short-term Debt (Footnotes) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2022	Sep. 28, 2022
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
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
Repayment of debt	70,000,000
UGI Utilities
Short-term Debt [Line Items]
Maximum borrowing capacity	350,000,000	350,000,000
Line of Credit | AmeriGas OLP | Letter of Credit | AmeriGas OLP Credit Agreement
Short-term Debt [Line Items]
Maximum borrowing capacity	150,000,000	100,000,000	$ 100,000,000
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 | Mountaineer | Letter of Credit
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	$ 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
Line of Credit | UGI Utilities | Letter of Credit | UGI Utilities, Inc. Credit Agreement
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 100,000,000