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Debt - UGI Utilities (Details) - UGI Utilities - USD ($)	1 Months Ended	12 Months Ended
	Oct. 31, 2017	Sep. 30, 2019	Jun. 27, 2019	Feb. 01, 2019	Sep. 30, 2018
Debt Instrument
Total capacity (up to)		$ 350,000,000.0			$ 450,000,000.0
Line of Credit | 2019 Credit Agreement
Debt Instrument
Total capacity (up to)			$ 350,000,000
Additional loan amount			150,000,000
Line of Credit | 2019 Credit Agreement | Minimum
Debt Instrument
Basis spread on variable rate (percentage)		0.00%
Line of Credit | 2019 Credit Agreement | Maximum
Debt Instrument
Basis spread on variable rate (percentage)		1.75%
Senior Notes | 4.55% Senior Notes due February 2049
Debt Instrument
Aggregate principal amount				$ 150,000,000
Stated interest rate				4.55%
Term Loan
Debt Instrument
Aggregate principal amount	$ 125,000,000
Debt instrument, quarterly payment	$ 1,600,000
Term Loan | Minimum
Debt Instrument
Basis spread on variable rate (percentage)	0.00%
Term Loan | Maximum
Debt Instrument
Basis spread on variable rate (percentage)	1.875%
Derivative, fixed interest rate	3.00%
Letter of Credit | Line of Credit | 2019 Credit Agreement
Debt Instrument
Total capacity (up to)		$ 50,000,000	100,000,000
Revolving Credit Facility | Line of Credit | 2019 Credit Agreement
Debt Instrument
Total capacity (up to)			$ 450,000,000

X

- Definition

Line of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

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-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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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- Definition

Amount of the required periodic payments applied to principal.

+ References

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

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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.

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