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Other Operating Income, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Component of Operating Income [Abstract]
Interest and interest-related income	$ 0.2	$ 0.8	$ 3.6
Utility non-tariff service income	2.6	4.8	2.7
Finance charges	15.2	12.7	17.5
Gains on sales of fixed assets, net	3.3	11.1	5.4
Other, net	1.1	15.0	6.9
Total other operating income, net	$ 22.4	$ 44.4	$ 36.1

X

- Definition

Finance charges.

+ References

No definition available.

+ Details

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X

- Definition

Interest And Interest Related Income.

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

Other Income net.

+ References

No definition available.

+ Details

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X

- Definition

Utility Non Tariff Service Income.

+ References

No definition available.

+ Details

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Namespace Prefix:	ugi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- References

No definition available.

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X

- Definition

The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.

+ References

No definition available.

+ Details

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