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Inventories (Details Textual) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 Storage_Agreement | Sep. 30, 2012 ft3 | Mar. 31, 2012 | Dec. 31, 2011 ft3
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Public Utilities, Inventory [Line Items] |  |  |  |
Number Of Storage Agreements | 3 |  |  |
Volume of gas storage inventories released under SCAAs with non-affiliates (in cubic feet) |  | 3,800,000,000 |  | 600,000,000
Carrying value of gas storage inventories released under SCAAs with non-affiliates |  | $ 11.4 | $ 2.9 |
UGI Utilities [Member] | Expires in October 2013 [Member] |  |  |  |
Public Utilities, Inventory [Line Items] |  |  |  |
Number Of Storage Agreements | 1 |  |  |
UGI Utilities [Member] | Expires in October 2015 [Member] |  |  |  |
Public Utilities, Inventory [Line Items] |  |  |  |
Number Of Storage Agreements | 2 |  |  |

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- Definition Volume of gas storage inventories released. + References No definition available. + Details
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- Details
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