Common Stock and Equity Based Compensation - Common Stock Share Activity (Details) - UGI Corporation Common Stock - shares	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Common Stock Share Activity
Beginning balance - shares issued	173,770,641	173,675,691	173,436,891
Beginning balance - shares outstanding	172,273,781	171,643,287	168,930,632
Employee and director plans - shares issued	36,350	94,950	238,800
Employee and director plans - shares outstanding	1,191,726	3,023,090	4,172,307
Dividend reinvestment plan - shares outstanding			93,253
Shares reacquired, employee and director plans - shares outstanding	(77,004)	(1,164,942)	(1,552,905)
Repurchases of Common Stock - shares outstanding	(1,000,000)	(1,227,654)
Ending balance - shares issued	173,806,991	173,770,641	173,675,691
Beginning balance - shares outstanding	172,388,503	172,273,781	171,643,287
Treasury Stock
Common Stock Share Activity
Beginning balance - shares issued	1,496,860	2,032,404	4,506,259
Employee and director plans - shares issued	1,155,376	2,928,140	3,933,507
Dividend reinvestment plan - shares issued			93,253
Shares reacquired, employee and director plans - held in treasury	(77,004)	(1,164,942)	(1,552,905)
Repurchases of Common Stock - held in treasury	(1,000,000)	(1,227,654)
Ending balance - shares issued	1,418,488	1,496,860	2,032,404