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Common Stock and Equity-Based Compensation - Additional Information Relating to Stock Options Outstanding and Exercisable (Details) - UGI Stock Option Awards	12 Months Ended
	Sep. 30, 2016 $ / shares shares
Under $20.00
Share-based Compensation Arrangement by Share-based Payment Award
Number of options (in shares) | shares	1,876,551
Weighted average remaining contractual life (in years)	4 years 1 month
Weighted average exercise price (in dollars per share)	$ 18.10
Number of options (in shares) | shares	1,876,551
Weighted average exercise price (in dollars per share)	$ 18.10
Range of exercise prices, lower limit (in dollars per share)	0
Range of exercise prices, upper limit (in dollars per share)	$ 20.00
$20.01 - $25.00
Share-based Compensation Arrangement by Share-based Payment Award
Number of options (in shares) | shares	2,209,352
Weighted average remaining contractual life (in years)	5 years 7 months
Weighted average exercise price (in dollars per share)	$ 21.58
Number of options (in shares) | shares	2,073,902
Weighted average exercise price (in dollars per share)	$ 21.56
Range of exercise prices, lower limit (in dollars per share)	20.01
Range of exercise prices, upper limit (in dollars per share)	$ 25.00
$25.01 - $30.00
Share-based Compensation Arrangement by Share-based Payment Award
Number of options (in shares) | shares	1,591,195
Weighted average remaining contractual life (in years)	7 years 1 month
Weighted average exercise price (in dollars per share)	$ 27.44
Number of options (in shares) | shares	1,033,454
Weighted average exercise price (in dollars per share)	$ 27.34
Range of exercise prices, lower limit (in dollars per share)	25.01
Range of exercise prices, upper limit (in dollars per share)	$ 30.00
$30.01 - $35.00
Share-based Compensation Arrangement by Share-based Payment Award
Number of options (in shares) | shares	1,453,584
Weighted average remaining contractual life (in years)	9 years 1 month
Weighted average exercise price (in dollars per share)	$ 33.65
Number of options (in shares) | shares	117,050
Weighted average exercise price (in dollars per share)	$ 32.90
Range of exercise prices, lower limit (in dollars per share)	30.01
Range of exercise prices, upper limit (in dollars per share)	$ 35.00
Over $35.00
Share-based Compensation Arrangement by Share-based Payment Award
Number of options (in shares) | shares	1,357,769
Weighted average remaining contractual life (in years)	8 years 5 months
Weighted average exercise price (in dollars per share)	$ 38.46
Number of options (in shares) | shares	421,413
Weighted average exercise price (in dollars per share)	$ 37.73
Range of exercise prices, lower limit (in dollars per share)	$ 35.01

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 718
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