Condensed Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 482.2us-gaap_ProfitLoss	$ 387.8us-gaap_ProfitLoss	$ 482.4us-gaap_ProfitLoss	$ 605.3us-gaap_ProfitLoss
Other comprehensive income (loss):
Net gains on derivative instruments (net of tax of $(10.4), $0.4, $(14.3) and $(7.1), respectively)	20.2	6.3	27.9	46.8
Reclassifications of net losses (gains) on derivative instruments (net of tax of $1.1, $3.3, $(0.4) and $5.3, respectively)	(1.9)	(31.4)	0.2	(45.2)
Foreign currency adjustments (net of tax of $35.0, $0.6, $50.6 and $(3.1), respectively)	(64.5)	(0.6)	(95.0)	11.7
Benefit plans (net of tax of $(0.2), $(0.1), $(0.6) and $0.0, respectively)	0.4	0.2	1.0	0.6
Other comprehensive (loss) income	(45.8)	(25.5)	(65.9)	13.9
Comprehensive income	436.4	362.3	416.5	619.2
Deduct comprehensive income attributable to noncontrolling interests, principally in AmeriGas Partners	(235.1)	(155.8)	(200.1)	(266.9)
Comprehensive income attributable to UGI Corporation	$ 201.3us-gaap_ComprehensiveIncomeNetOfTax	$ 206.5us-gaap_ComprehensiveIncomeNetOfTax	$ 216.4us-gaap_ComprehensiveIncomeNetOfTax	$ 352.3us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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