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Partnership Acquisition of Heritage Propane (Details 1) (Heritage Propane [Member], USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Heritage Propane [Member] |  |
Partnership unaudited consolidated results of operations |  |
Revenues | $ 2,023.2 | $ 2,111.2
Net income attributable to UGI Corporation | $ 102.6 | $ 85.4
Earnings per common share attributable to UGI Corporation stockholders: |  |
Basic (in dollars per share) | $ 0.91 | $ 0.76
Diluted (in dollars per share) | $ 0.90 | $ 0.75

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