Condensed Consolidated Statements of Changes in Equity (unaudited) (USD $) In Millions, unless otherwise specified	Total	Parent	Common Stock, Without Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests
Balance, beginning of period at Sep. 30, 2012			$ 1,157.7	$ 1,156.0	$ (55.2)	$ (28.7)	$ 1,085.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock issued in connection with employee and director plans (including gains (losses) on treasury stock transactions), net of tax withheld			19.7			20.8
Dividend reinvestment plan			1.4			0.8
Excess tax benefits realized on equity-based compensation			5.7
Equity-based compensation expense			8.4
Net income attributable to UGI Corporation	292.3			292.3
Cash dividends on Common Stock				(93.4)
Net gains on derivative instruments, net of tax	(7.2)				10.5
Reclassification of net (gains) losses on derivative instruments, net of tax	52.3				14.9
Benefit plans, net of tax	(1.1)				1.1
Foreign currency, net of tax	1.3				1.3
Repurchases of Common Stock						0
Reacquired Common Stock - employee and director plans						(19.1)
Net income attributable to noncontrolling interests, principally in AmeriGas Partners	194.4						194.4
Net gains (losses) on derivative instruments							(17.7)
Reclassification of net (gains) losses on derivative instruments							37.3
Dividends and distributions							(168.7)
Other							3.0
Balance, end of period at Jun. 30, 2013	3,628.1	2,494.2	1,192.9	1,354.9	(27.4)	(26.2)	1,133.9
Balance, beginning of period at Sep. 30, 2013	3,547.9		1,208.1	1,308.3	8.4	(32.3)	1,055.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock issued in connection with employee and director plans (including gains (losses) on treasury stock transactions), net of tax withheld			(9.6)			46.7
Dividend reinvestment plan			0			0
Excess tax benefits realized on equity-based compensation			8.4
Equity-based compensation expense			9.1
Net income attributable to UGI Corporation	357.0			357.0
Cash dividends on Common Stock				(98.6)
Net gains on derivative instruments, net of tax	46.2				12.3
Reclassification of net (gains) losses on derivative instruments, net of tax	(46.7)				(7.6)
Benefit plans, net of tax	(0.8)				0.8
Foreign currency, net of tax	11.5				11.5
Repurchases of Common Stock						(21.4)
Reacquired Common Stock - employee and director plans						(30.1)
Net income attributable to noncontrolling interests, principally in AmeriGas Partners	235.6						235.6
Net gains (losses) on derivative instruments							33.9
Reclassification of net (gains) losses on derivative instruments							(39.1)
Dividends and distributions							(176.9)
Other							0.9
Balance, end of period at Jun. 30, 2014	$ 3,880.8	$ 2,771.0	$ 1,216.0	$ 1,566.7	$ 25.4	$ (37.1)	$ 1,109.8