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Common Stock And Equity Based Compensation - UGI Performance Unit Award Activity (Details) - $ / shares | 12 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
UGI Performance Units and Stock Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Number of units - beginning balance (in units) |  | 1,306,181 |  |  |
Granted (in units) |  | 180,724 |  | 234,264 | 381,900
Number of units - ending balance (in units) |  | 1,136,251 |  | 1,306,181 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Weighted average grant date fair value - beginning balance (in usd per unit) |  | $ 20.58 |  |  |
Granted (in usd per unit) |  | 38.20 |  | $ 31.38 | $ 24.87
Weighted average grant date fair value - ending balance (in usd per unit) |  | $ 23.78 |  | $ 20.58 |
UGI Performance Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Granted (in units) |  | 140,923 |  |  |
Forfeited (in units) |  | (18,144) |  |  |
Vested (in units) |  | 0 |  |  |
Unit awards paid (in units) |  | (263,966) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Granted (in usd per unit) |  | $ 38.43 |  |  |
Forfeited (in usd per unit) |  | 30.16 |  |  |
Vested (in usd per unit) |  | 0.00 |  |  |
Unit awards paid (in usd per unit) |  | $ 19.10 |  |  |
UGI Stock Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Granted (in units) |  | 39,801 | [1] | 44,814 | 51,038
Forfeited (in units) |  | (1,125) |  |  |
Vested (in units) |  | 0 |  |  |
Unit awards paid (in units) |  | (67,419) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Granted (in usd per unit) | [1] | $ 37.39 |  |  |
Forfeited (in usd per unit) |  | 29.84 |  |  |
Vested (in usd per unit) |  | 0.00 |  |  |
Unit awards paid (in usd per unit) |  | $ 17.04 |  |  |
Shares granted under stock awards (percentage) |  | 70.00% |  |  |
Vested | UGI Performance Units and Stock Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Number of units - beginning balance (in units) |  | 781,231 |  |  |
Number of units - ending balance (in units) |  | 803,817 |  | 781,231 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Weighted average grant date fair value - beginning balance (in usd per unit) |  | $ 16.60 |  |  |
Weighted average grant date fair value - ending balance (in usd per unit) |  | $ 20.19 |  | $ 16.60 |
Vested | UGI Performance Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Granted (in units) |  | 22,942 |  |  |
Forfeited (in units) |  | 0 |  |  |
Vested (in units) |  | 290,678 |  |  |
Unit awards paid (in units) |  | (263,966) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Granted (in usd per unit) |  | $ 38.51 |  |  |
Forfeited (in usd per unit) |  | 0.00 |  |  |
Vested (in usd per unit) |  | 24.60 |  |  |
Unit awards paid (in usd per unit) |  | $ 19.10 |  |  |
Vested | UGI Stock Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Granted (in units) | [1] | 38,101 |  |  |
Vested (in units) |  | 2,250 |  |  |
Unit awards paid (in units) |  | (67,419) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Granted (in usd per unit) | [1] | $ 37.37 |  |  |
Vested (in usd per unit) |  | 22.86 |  |  |
Unit awards paid (in usd per unit) |  | $ 17.04 |  |  |
Non-Vested | UGI Performance Units and Stock Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Number of units - beginning balance (in units) |  | 524,950 |  |  |
Number of units - ending balance (in units) |  | 332,434 |  | 524,950 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Weighted average grant date fair value - beginning balance (in usd per unit) |  | $ 26.51 |  |  |
Weighted average grant date fair value - ending balance (in usd per unit) |  | $ 32.28 |  | $ 26.51 |
Non-Vested | UGI Performance Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Granted (in units) |  | 117,981 |  |  |
Forfeited (in units) |  | (18,144) |  |  |
Vested (in units) |  | 290,678 |  |  |
Unit awards paid (in units) |  | 0 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Granted (in usd per unit) |  | $ 38.41 |  |  |
Forfeited (in usd per unit) |  | 30.16 |  |  |
Vested (in usd per unit) |  | 24.60 |  |  |
Unit awards paid (in usd per unit) |  | $ 0.00 |  |  |
Non-Vested | UGI Stock Units |  |  |  |  |
UGI Unit Award Activity |  |  |  |  |
Granted (in units) | [1] | 1,700 |  |  |
Forfeited (in units) |  | (1,125) |  |  |
Vested (in units) |  | 2,250 |  |  |
Unit awards paid (in units) |  | 0 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Granted (in usd per unit) | [1] | $ 37.75 |  |  |
Forfeited (in usd per unit) |  | 29.84 |  |  |
Vested (in usd per unit) |  | 22.86 |  |  |
Unit awards paid (in usd per unit) |  | $ 0.00 |  |  |
[1] | Generally, shares granted under UGI Stock Unit awards are paid approximately 70% in shares. UGI Stock Unit awards granted in Fiscal 2014 and Fiscal 2013 were 44,814 and 51,038, respectively.

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- Definition Share based compensation arrangement by share based payment award equity instruments other than options unit awards paid weighted average grant date fair value. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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