Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Accounts receivable, allowances for doubtful accounts	$ 37.9	$ 39.1	$ 43.8
Property, plant and equipment, accumulated depreciation and amortization	$ 2,664.2	$ 2,633.0	$ 2,630.9
UGI Common Stock, without par value (in shares)
UGI Common Stock, without par value, shares authorized (in shares)	450,000,000us-gaap_CommonStockSharesAuthorized	450,000,000us-gaap_CommonStockSharesAuthorized	450,000,000us-gaap_CommonStockSharesAuthorized
UGI Common Stock, without par value, shares issued (in shares)	173,772,391us-gaap_CommonStockSharesIssued	173,770,641us-gaap_CommonStockSharesIssued	173,675,691us-gaap_CommonStockSharesIssued

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Face amount per share of no-par value common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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