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Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2016
Sep. 30, 2015
Mar. 31, 2015
Statement of Financial Position [Abstract]      
Accounts receivable, allowances for doubtful accounts $ 34.1 $ 29.7 $ 42.7
Property, plant and equipment, accumulated depreciation and amortization $ 2,987.1 $ 2,835.0 $ 2,691.0
UGI Common Stock, without par value, shares authorized 450,000,000 450,000,000 450,000,000
UGI Common Stock, without par value, shares issued 173,842,891 173,806,991 173,788,741