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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
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Sep. 30, 2018 $ / shares shares
Exercise Price Range, Over Forty [Member] |
Share-based Compensation Arrangement by Share-based Payment Award |
Range of exercise prices, lower limit (in dollars per share) | $ 40
Under $25.00 |
Share-based Compensation Arrangement by Share-based Payment Award |
Range of exercise prices, lower limit (in dollars per share) | 0
Range of exercise prices, upper limit (in dollars per share) | $ 25
Number of options (in shares) | shares | 2,322,904
Weighted average remaining contractual life (in years) | 3 years 4 months
Weighted average exercise price (in dollars per share) | $ 20.53
Number of options (in shares) | shares | 2,322,904
Weighted average exercise price (in dollars per share) | $ 20.53
$25.00 – $30.00 |
Share-based Compensation Arrangement by Share-based Payment Award |
Number of options (in shares) | shares | 1,133,676
Weighted average remaining contractual life (in years) | 5 years
Weighted average exercise price (in dollars per share) | $ 27.38
Number of options (in shares) | shares | 1,133,676
Weighted average exercise price (in dollars per share) | $ 27.38
$30.01 – $35.00 |
Share-based Compensation Arrangement by Share-based Payment Award |
Range of exercise prices, lower limit (in dollars per share) | 25
Range of exercise prices, upper limit (in dollars per share) | $ 30
Number of options (in shares) | shares | 1,150,685
Weighted average remaining contractual life (in years) | 7 years 1 month
Weighted average exercise price (in dollars per share) | $ 33.66
Number of options (in shares) | shares | 714,201
Weighted average exercise price (in dollars per share) | $ 33.59
$35.01 – $40.00 |
Share-based Compensation Arrangement by Share-based Payment Award |
Range of exercise prices, lower limit (in dollars per share) | 30.01
Range of exercise prices, upper limit (in dollars per share) | $ 35
Number of options (in shares) | shares | 917,843
Weighted average remaining contractual life (in years) | 6 years 3 months
Weighted average exercise price (in dollars per share) | $ 37.80
Number of options (in shares) | shares | 809,899
Weighted average exercise price (in dollars per share) | $ 37.81
Over $40.00 |
Share-based Compensation Arrangement by Share-based Payment Award |
Number of options (in shares) | shares | 2,671,961
Weighted average remaining contractual life (in years) | 8 years 9 months
Weighted average exercise price (in dollars per share) | $ 47.16
Number of options (in shares) | shares | 517,650
Weighted average exercise price (in dollars per share) | $ 46.46
Exercise Price Range, Between Thirty-Five and Forty Dollars [Member] |
Share-based Compensation Arrangement by Share-based Payment Award |
Range of exercise prices, lower limit (in dollars per share) | 35.01
Range of exercise prices, upper limit (in dollars per share) | $ 40

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- Definition 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=96867065&loc=d3e5070-113901 + Details
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- Definition 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=96867065&loc=d3e5070-113901 + Details
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- Definition 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) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition 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 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=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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