Revisions of Condensed Consolidated Financial Statements Comprehensive income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Net income	$ 217.5	$ 167.8
Net gains (losses) on derivative instruments, net of tax	40.5	(5.3)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(13.8)	17.4
Other comprehensive income	39.4	28.5
Comprehensive income	256.9	196.3
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(111.1)	(75.9)
Comprehensive income attributable to UGI Corporation	145.8	120.4
Scenario, Previously Reported [Member]
Net income		170.7
Net gains (losses) on derivative instruments, net of tax		(9.3)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax		21.8
Other comprehensive income		28.9
Comprehensive income		199.6
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest		(78.7)
Comprehensive income attributable to UGI Corporation		120.9
Restatement Adjustment [Member]
Net income		(2.9)
Net gains (losses) on derivative instruments, net of tax		4.0
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax		(4.4)
Other comprehensive income		(0.4)
Comprehensive income		(3.3)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest		2.8
Comprehensive income attributable to UGI Corporation		$ (0.5)