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

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt - UGI Utilities (Details) - USD ($)		1 Months Ended
Debt - UGI Utilities (Details) - USD ($)	Oct. 31, 2017	Oct. 31, 2017	Sep. 30, 2018	Aug. 31, 2018	Sep. 30, 2017	Oct. 31, 2016	Sep. 30, 2016	Jun. 30, 2016
UGI Utilities
Debt Instrument
Total capacity			$ 450,000,000		$ 300,000,000
UGI Utilities \| Term Loan
Debt Instrument
Aggregate principal amount	$ 125,000,000	$ 125,000,000
Principal repayment in equal quarterly installments		$ 1,600,000
UGI Utilities \| Term Loan \| Minimum
Debt Instrument
Basis spread on variable rate (percentage)		0.00%
UGI Utilities \| Term Loan \| Maximum
Debt Instrument
Basis spread on variable rate (percentage)	3.00%	1.875%
Derivative, fixed interest rate	3.00%	3.00%
UGI Utilities \| Senior Notes \| 2.95%, due June 2026
Debt Instrument
Aggregate principal amount								$ 100,000,000
Stated interest rate			2.95%					2.95%
UGI Utilities \| Senior Notes \| 4.12%, due September 2046
Debt Instrument
Aggregate principal amount							$ 200,000,000
Stated interest rate			4.12%				4.12%
UGI Utilities \| Senior Notes \| 4.12%, due October 2046
Debt Instrument
Aggregate principal amount						$ 100,000,000
Stated interest rate			4.12%			4.12%
UGI Utilities \| Senior Notes \| 5.75% Senior Notes, due 2016
Debt Instrument
Stated interest rate						5.75%
UGI Utilities \| Medium-term Notes \| 7.37% Medium-term Notes, due October 2015
Debt Instrument
Stated interest rate						7.37%
UGI Utilities \| Medium-term Notes \| 5.64% Medium-term Notes, due December 2015
Debt Instrument
Stated interest rate						5.64%
Revolving Credit Facility \| Line of Credit \| UGI Utilities Credit Agreement
Debt Instrument
Total capacity			$ 300,000,000	$ 450,000,000