Condensed Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (12.7)	$ (22.8)	$ 592.6	$ 486.7
Other comprehensive income (loss):
Net (losses) gains on derivative instruments (net of tax of $0.6, $(4.1) $(6.5) and $(7.1), respectively)	(0.6)	(7.6)	46.2	(7.2)
Reclassifications of net (gains) losses on derivative instruments (net of tax of $(1.3), $(2.1), $4.0 and $(9.8), respectively)	(1.5)	9.7	(46.7)	52.3
Foreign currency adjustments (net of tax of $0.0, $(2.4), $(3.1) and $1.8, respectively)	(0.2)	8.8	11.5	1.3
Benefit plans (net of tax of $(0.2), $(0.2), $(0.2) and $(0.7), respectively)	0.2	0.3	0.8	1.1
Other comprehensive (loss) income	(2.1)	11.2	11.8	47.5
Comprehensive (loss) income	(14.8)	(11.6)	604.4	534.2
Add comprehensive loss (deduct comprehensive income) attributable to noncontrolling interests, principally in AmeriGas Partners	36.5	39.9	(230.4)	(214.0)
Comprehensive income attributable to UGI Corporation	$ 21.7	$ 28.3	$ 374.0	$ 320.2