Consolidated Statements of Changes In Equity (USD $) In Millions, unless otherwise specified	Total	Total UGI Corporation Stockholder's Equity	Common stock, without par value	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests
Beginning Balance at Sep. 30, 2009							$ 225.4
Beginning Balance at Sep. 30, 2009			875.6	804.3	(38.9)	(49.6)
Common stock issued:
Employee and director plans						10.6
Employee and director plans			14.4
Dividend reinvestment plan			1.7			0.8
Reacquired common stock - employee and director plans						0
Excess tax benefits realized on equity-based compensation			4.2
Stock-based compensation expense			10.2
Net losses on derivative instruments, net of tax	(16.8)				(37.8)
Reclassifications of net losses on derivative instruments, net of tax	(22.9)				37.2
Benefit plans, principally actuarial (losses) gains, net of tax	(18.7)				(18.7)
Reclassification of benefit plans actuarial losses and prior service costs, net of tax, to net income	4.2				4.2
Reclassifications of pension plans actuarial losses and prior service cost, net of tax, to regulatory assets	83.3				83.3
Adjustments to reflect change in ownership of Amerigas Partners, net of tax			0		0		0
Net income attributable to UGI Corporation	261.0			261.0
Cash dividends on Common Stock ($1.06, $1.02 and $0.90 per share, respectively)				(98.6)
Foreign currency losses on long-term intra-company transactions, net of tax	0
Foreign currency translation adjustments, net of tax	(39.4)				(39.4)
Net (loss) income attributable to noncontrolling interests, principally in AmeriGas Partners	94.7						94.7
Net (losses) gainson derivative instruments							21.0
Reclassification of net losses (gains) on derivative instruments							(14.3)
Dividends and distributions							(89.1)
AmeriGas Partners Common Unit public offering							0
AmeriGas Partners Common Units issued for Heritage Acquisition							0
Other							(0.6)
Ending Balance at Sep. 30, 2010		1,824.5	906.1	966.7	(10.1)	(38.2)
Ending Balance at Sep. 30, 2010	2,061.6						237.1
Common stock issued:
Employee and director plans						9.7
Employee and director plans			14.7
Dividend reinvestment plan			2.2			0.7
Reacquired common stock - employee and director plans						0
Excess tax benefits realized on equity-based compensation			3.8
Stock-based compensation expense			10.6
Net losses on derivative instruments, net of tax	(10.8)				(23.4)
Reclassifications of net losses on derivative instruments, net of tax	(11.8)				29.9
Benefit plans, principally actuarial (losses) gains, net of tax	0.1				0.1
Reclassification of benefit plans actuarial losses and prior service costs, net of tax, to net income	0.6				0.6
Reclassifications of pension plans actuarial losses and prior service cost, net of tax, to regulatory assets	0
Adjustments to reflect change in ownership of Amerigas Partners, net of tax			0		0		0
Net income attributable to UGI Corporation	232.9			232.9
Cash dividends on Common Stock ($1.06, $1.02 and $0.90 per share, respectively)				(113.8)
Foreign currency losses on long-term intra-company transactions, net of tax	(0.8)				(0.8)
Foreign currency translation adjustments, net of tax	(14.0)				(14.0)
Net (loss) income attributable to noncontrolling interests, principally in AmeriGas Partners	75.3						75.3
Net (losses) gainson derivative instruments							12.6
Reclassification of net losses (gains) on derivative instruments							(18.1)
Dividends and distributions							(94.0)
AmeriGas Partners Common Unit public offering							0
AmeriGas Partners Common Units issued for Heritage Acquisition							0
Other							0.5
Ending Balance at Sep. 30, 2011	1,977.7	1,977.7	937.4	1,085.8	(17.7)	(27.8)
Ending Balance at Sep. 30, 2011	2,191.1						213.4
Common stock issued:
Employee and director plans						6.4
Employee and director plans			13.6
Dividend reinvestment plan			2.2			0.9
Reacquired common stock - employee and director plans						(8.2)
Excess tax benefits realized on equity-based compensation			1.8
Stock-based compensation expense			8.3
Net losses on derivative instruments, net of tax	(127.1)				(67.3)
Reclassifications of net losses on derivative instruments, net of tax	(87.9)				54.2
Benefit plans, principally actuarial (losses) gains, net of tax	(11.5)				(11.5)
Reclassification of benefit plans actuarial losses and prior service costs, net of tax, to net income	0.7				0.7
Reclassifications of pension plans actuarial losses and prior service cost, net of tax, to regulatory assets	0
Adjustments to reflect change in ownership of Amerigas Partners, net of tax			194.4		1.9		(321.4)
Net income attributable to UGI Corporation	199.4			199.4
Cash dividends on Common Stock ($1.06, $1.02 and $0.90 per share, respectively)				(119.1)
Foreign currency losses on long-term intra-company transactions, net of tax	(1.7)				(1.7)
Foreign currency translation adjustments, net of tax	(20.6)				(20.6)
Net (loss) income attributable to noncontrolling interests, principally in AmeriGas Partners	(12.8)						(12.8)
Net (losses) gainson derivative instruments							(59.8)
Reclassification of net losses (gains) on derivative instruments							33.7
Dividends and distributions							(182.1)
AmeriGas Partners Common Unit public offering							276.6
AmeriGas Partners Common Units issued for Heritage Acquisition							1,132.6
Other							5.5
Ending Balance at Sep. 30, 2012	2,233.1	2,233.1	1,157.7	1,166.1	(62.0)	(28.7)
Ending Balance at Sep. 30, 2012	$ 3,318.8						$ 1,085.7