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Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
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Statement of Financial Position [Abstract] |  |  |
Accounts receivable, allowances for doubtful accounts | $ 30.6 | $ 29.7 | $ 37.9
Property, plant and equipment, accumulated depreciation and amortization | $ 2,896.4 | $ 2,835.0 | $ 2,664.2
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 | 173,825,741 | 173,806,991 | 173,772,391

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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524 + Details
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