Acquisition of Totalgaz - Schedule of Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015
As Reported
Revenues	$ 1,130.8	$ 1,148.1	[1]	$ 4,709.5	$ 5,608.3	[1]
Net income attributable to UGI Corporation	$ 60.7	$ 9.6		$ 408.5	$ 290.2
Earnings Per Share [Abstract]
Basic (in dollars per share)	$ 0.35	$ 0.06		$ 2.36	$ 1.68
Diluted (in dollars per share)	$ 0.34	$ 0.05		$ 2.33	$ 1.65
Totalgaz SAS
Pro Forma Adjusted
Revenues		$ 1,204.2			$ 5,983.0
Net income attributable to UGI Corporation		$ 16.3			$ 348.5
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)		$ 0.09			$ 2.01
Diluted (in dollars per share)		$ 0.09			$ 1.98

[1] Certain amounts have been restated to reflect the current-year changes in our segment presentation as described above.