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Debt - Accounts Receivable Securitization Facility (Details) - USD ($) | 6 Months Ended
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Oct. 31, 2016 | Apr. 30, 2016
Energy Services | Receivables Facility | Energy Services Receivables Facility |  |
Short-term Debt |  |
Maximum borrowing capacity | $ 75,000,000 | $ 150,000,000

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- Definition Receivables Facility, Maximum Borrowing Capacity + References No definition available. + Details
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Namespace Prefix: | ugi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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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Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |