Condensed Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 0.2	$ 217.5
Other comprehensive income (loss):
Net gains on derivative instruments (net of tax of $(3.9) and $(7.5), respectively)	7.7	40.5
Reclassifications of net losses (gains) on derivative instruments (net of tax of $(1.5) and $2.0, respectively)	2.1	(13.8)
Foreign currency adjustments (net of tax of $15.6 and $(3.7), respectively)	(30.5)	12.3
Benefit plans (net of tax of $(0.4) and $0.1, respectively)	0.6	0.4
Other comprehensive (loss) income	(20.1)	39.4
Comprehensive (loss) income	(19.9)	256.9
Add comprehensive loss (deduct comprehensive income) attributable to noncontrolling interests, principally in AmeriGas Partners	35.0	(111.1)
Comprehensive income attributable to UGI Corporation	$ 15.1	$ 145.8