Condensed Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 387.8	$ 341.7	$ 605.3	$ 509.5
Other comprehensive income (loss):
Net gains on derivative instruments (net of tax of $0.4, $(4.4), $(7.1) and $(3.0), respectively)	6.3	5.7	46.8	0.4
Reclassifications of net (gains) losses on derivative instruments (net of tax of $3.3, $(4.2), $5.3 and $(7.7), respectively)	(31.4)	25.2	(45.2)	42.6
Foreign currency adjustments (net of tax of $0.6, $8.2, $(3.1) and $4.2, respectively)	(0.6)	(23.6)	11.7	(7.5)
Benefit plans (net of tax of $(0.1), $(0.3), $0.0 and $(0.5), respectively)	0.2	0.5	0.6	0.8
Other comprehensive (loss) 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, principally in AmeriGas Partners	(155.8)	(178.0)	(266.9)	(253.9)
Comprehensive income attributable to UGI Corporation	$ 206.5	$ 171.5	$ 352.3	$ 291.9