Debt - Schedule of Credit Facilities and Short-term Borrowings (Details)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 EUR (€)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)
AmeriGas OLP
Short-term Debt [Line Items]
Total Capacity	$ 600,000,000		$ 600,000,000
Borrowings Outstanding	0		131,000,000
Letters of Credit and Guarantees Outstanding	2,000,000		2,000,000
Available Borrowing Capacity	$ 598,000,000		$ 467,000,000
Weighted Average Interest Rate - End of Year			7.27%	7.27%
UGI International LLC
Short-term Debt [Line Items]
Total Capacity \| €		€ 500,000,000		€ 300,000,000
Borrowings Outstanding \| €		202,000,000		0
Letters of Credit and Guarantees Outstanding \| €		0		0
Available Borrowing Capacity \| €		€ 298,000,000		€ 300,000,000
Weighted Average Interest Rate - End of Year	5.17%	5.17%
Energy Services
Short-term Debt [Line Items]
Total Capacity	$ 260,000,000		$ 260,000,000
Borrowings Outstanding	57,000,000		0
Letters of Credit and Guarantees Outstanding	0		0
Available Borrowing Capacity	$ 203,000,000		260,000,000
Weighted Average Interest Rate - End of Year	7.67%	7.67%
UGI Utilities
Short-term Debt [Line Items]
Total Capacity	$ 425,000,000		350,000,000
Borrowings Outstanding	248,000,000		151,000,000
Letters of Credit and Guarantees Outstanding	0		0
Available Borrowing Capacity	$ 177,000,000		$ 199,000,000
Weighted Average Interest Rate - End of Year	6.30%	6.30%	4.37%	4.37%
Mountaineer
Short-term Debt [Line Items]
Total Capacity	$ 150,000,000		$ 100,000,000
Borrowings Outstanding	84,000,000		85,000,000
Letters of Credit and Guarantees Outstanding	0		0
Available Borrowing Capacity	$ 66,000,000		$ 15,000,000
Weighted Average Interest Rate - End of Year	6.68%	6.68%	3.82%	3.82%
UGI Corporation
Short-term Debt [Line Items]
Total Capacity	$ 300,000,000		$ 300,000,000
Borrowings Outstanding	283,000,000		252,000,000
Letters of Credit and Guarantees Outstanding	0		0
Available Borrowing Capacity	$ 17,000,000		$ 48,000,000
Weighted Average Interest Rate - End of Year	7.80%	7.80%	5.62%	5.62%

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481372/852-10-55-10

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-Publisher FASB
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-Topic 942
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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