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Debt - Schedule of Receivables Facility (Details) - Energy Services - Receivables Facility - Energy Services Receivables Facility - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Short-term Debt
Trade receivables transferred to ESFC during the year		$ 756.4	$ 1,037.8	$ 1,260.6
ESFC trade receivables sold to the bank during the year		204.0	306.5	354.0
ESFC trade receivables - end of year	[1]	$ 35.7	$ 44.1	$ 46.4
[1] The amounts of ESFC trade receivables sold to the bank are reflected as short-term borrowings on the Consolidated Balance Sheets.

X

- Definition

Outstanding balance of ESFC trade receivables.

+ References

No definition available.

+ Details

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Namespace Prefix:	ugi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Sale of trade receivables to consolidated special purpose subsidiary.

+ References

No definition available.

+ Details

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Namespace Prefix:	ugi_
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Balance Type:	debit
Period Type:	instant

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- Definition

Proceeds from securitizations of receivables treated as collateralized borrowings, which are classified as financing transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

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Balance Type:	debit
Period Type:	duration

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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.

+ Details

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- Details

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- Details

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X

- Details

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