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) Income	Treasury Stock	Noncontrolling Interests
Balance, beginning of period at Sep. 30, 2013			$ 1,208.1	$ 1,308.3	$ 8.4	$ (32.3)	$ 1,055.4
Increase (Decrease) in Stockholders' Equity
Common Stock issued in connection with employee and director plans (including (losses) gains on treasury stock transactions), net of tax withheld			0.2
Common stock issued in connection with employee and director plans, net of tax withheld						1.9
Excess tax benefits realized on equity-based compensation			0.3
Equity-based compensation expense			1.4
Net income attributable to UGI Corporation	122.0			122.0
Cash dividends on Common Stock				(32.4)
Net gains on derivative instruments, net of tax	40.5				15.3
Reclassification of net losses (gains) on derivative instruments, net of tax	(13.8)				(4.2)
Benefit plans (net of tax of $(0.4) and $0.1, respectively)	0.4				0.4
Foreign currency, net of tax	12.3				12.3
Reacquired common stock - employee and director plans						(0.1)
Net (loss) income attributable to noncontrolling interests, principally in AmeriGas Partners	95.5						95.5
Net gains on derivative instruments							25.2
Reclassification of net gains on derivative instruments							(9.6)
Dividends and distributions							(58.0)
Other							0.6
Balance, end of period at Dec. 31, 2013	3,718.7	2,609.6	1,210.0	1,397.9	32.2	(30.5)	1,109.1
Balance, beginning of period at Sep. 30, 2014	3,663.2		1,215.6	1,509.4	(21.2)	(44.7)	1,004.1
Increase (Decrease) in Stockholders' Equity
Common Stock issued in connection with employee and director plans (including (losses) gains on treasury stock transactions), net of tax withheld			(3.9)
Common stock issued in connection with employee and director plans, net of tax withheld						9.8
Excess tax benefits realized on equity-based compensation			1.8
Equity-based compensation expense			2.2
Net income attributable to UGI Corporation	34.1			34.1
Cash dividends on Common Stock				(37.5)
Net gains on derivative instruments, net of tax	7.7				7.7
Reclassification of net losses (gains) on derivative instruments, net of tax	2.1				3.3
Benefit plans (net of tax of $(0.4) and $0.1, respectively)	0.6				0.6
Foreign currency, net of tax	(30.5)				(30.5)
Reacquired common stock - employee and director plans						(0.4)
Net (loss) income attributable to noncontrolling interests, principally in AmeriGas Partners	(33.9)						(33.9)
Net gains on derivative instruments							0
Reclassification of net gains on derivative instruments							(1.2)
Dividends and distributions							(60.8)
Other							0.2
Balance, end of period at Dec. 31, 2014	$ 3,554.7	$ 2,646.3	$ 1,215.7	$ 1,506.0	$ (40.1)	$ (35.3)	$ 908.4