Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowances for doubtful accounts	$ 40.3	$ 39.1	$ 52.5
Property, plant and equipment, accumulated depreciation and amortization	$ 2,773.6	$ 2,633.0	$ 2,702.3
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	173,806,991	173,770,641	173,746,041