Restatements of Condensed Consolidated Financial Statements - Condensed Consolidated Statement of Comprehensive income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 387.8	$ 341.7	$ 605.3	$ 509.5
Net gains on derivative instruments, net of tax	6.3	5.7	46.8	0.4
Reclassification of net (gains) losses on derivative instruments, net of tax	(31.4)	25.2	(45.2)	42.6
Other comprehensive income	(25.5)	7.8	13.9	36.3
Comprehensive income	362.3	349.5	619.2	545.8
Deduct comprehensive income attributable to noncontrolling interests	(155.8)	(178.0)	(266.9)	(253.9)
Comprehensive income attributable to UGI Corporation	206.5	171.5	352.3	291.9
As Previously Reported
Net income		326.2		496.9
Net gains on derivative instruments, net of tax		9.2		(0.1)
Reclassification of net (gains) losses on derivative instruments, net of tax		29.0		50.8
Other comprehensive income		15.1		44.0
Comprehensive income		341.3		540.9
Deduct comprehensive income attributable to noncontrolling interests		(171.3)		(250.0)
Comprehensive income attributable to UGI Corporation		170.0		290.9
As Restated
Net income		15.5		12.6
Net gains on derivative instruments, net of tax		(3.5)		0.5
Reclassification of net (gains) losses on derivative instruments, net of tax		(3.8)		(8.2)
Other comprehensive income		(7.3)		(7.7)
Comprehensive income		8.2		4.9
Deduct comprehensive income attributable to noncontrolling interests		(6.7)		(3.9)
Comprehensive income attributable to UGI Corporation		$ 1.5		$ 1.0