Condensed Consolidated Statements of Changes in Equity (USD $) In Millions	Total	Parent [Member]	Common stock, without par value	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling Interest [Member]	Accumulated Defined Benefit Plans Adjustment [Member] Accumulated other comprehensive income (loss)
Stockholders' Equity Attributable to Noncontrolling Interest at Sep. 30, 2012							$ 1,085.6
Beginning Balance at Sep. 30, 2012			1,157.7	1,156.0	(55.2)	(28.7)
Common Stock issued in connection with employee and director plans, net of tax withheld			9.6
Dividend reinvestment plan			0.5			0.2
Excess tax benefits realized on equity-based compensation			1.3
Stock-based compensation expense			0.9
Net income attributable to UGI Corporation	102.5			102.5
Cash dividends on Common Stock				(30.6)
Net gains (losses) on derivative instruments, net of tax	(5.3)				(3.4)
Reclassification of net (gains) losses on derivative instruments, net of tax	(17.4)				4.9
Benefit plans, net of tax								0.3
Foreign currency, net of tax	16.1				16.1
Common Stock issued in connection with employee and director plans, net of tax withheld						7.2
Reacquired common stock - employee and director plans						(8.1)
Net income attributable to noncontrolling interests, principally in AmeriGas Partners	65.3						65.3
Net gains (losses) on derivative instruments							(1.9)
Reclassification of net (gains) losses on derivative instruments							12.5
Dividends and distributions							(55.2)
Other							1.3
Total equity	3,438.8						1,107.6
Stockholders' Equity Attributable to Noncontrolling Interest at Dec. 31, 2012	1,107.6						1,107.6
Ending Balance at Dec. 31, 2012	2,331.2	2,331.2	1,170.0	1,227.9	(37.3)	(29.4)
Stockholders' Equity Attributable to Noncontrolling Interest at Sep. 30, 2013	1,055.4						1,055.4
Beginning Balance at Sep. 30, 2013	2,492.5		1,208.1	1,308.3	8.4	(32.3)
Common Stock issued in connection with employee and director plans, net of tax withheld			0.2
Dividend reinvestment plan			0
Excess tax benefits realized on equity-based compensation			0.3
Stock-based compensation expense			1.4
Net income attributable to UGI Corporation	122.0			122.0
Cash dividends on Common Stock				(32.4)
Net gains (losses) on derivative instruments, net of tax	40.5				15.3
Reclassification of net (gains) losses on derivative instruments, net of tax	13.8				(4.2)
Benefit plans, net of tax	23.8							0.4
Foreign currency, net of tax	12.3				12.3
Common Stock issued in connection with employee and director plans, net of tax withheld						1.9
Reacquired common stock - employee and director plans						(0.1)
Net income attributable to noncontrolling interests, principally in AmeriGas Partners	95.5						95.5
Net gains (losses) on derivative instruments							25.2
Reclassification of net (gains) losses on derivative instruments							(9.6)
Dividends and distributions							(58.0)
Other							0.6
Total equity	3,718.7
Stockholders' Equity Attributable to Noncontrolling Interest at Dec. 31, 2013	1,109.1						1,109.1
Ending Balance at Dec. 31, 2013	$ 2,609.6	$ 2,609.6	$ 1,210.0	$ 1,397.9	$ 32.2	$ (30.5)