Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interests	$ 28.6	$ (15.9)	$ 604.5	$ 466.5
Other comprehensive income (loss):
Net gains (losses) on derivative instruments (net of tax of $(3.4), $2.4, $10.9 and $(11.9), respectively)	7.8	(4.8)	(15.1)	23.1
Reclassifications of net losses (gains) on derivative instruments (net of tax of $(0.4), $(1.9), $5.5 and $(2.3), respectively)	0.6	0.5	(9.0)	0.7
Foreign currency adjustments (net of tax of $0, $(55.3), $0 and $(4.7), respectively)	(35.4)	(23.0)	(18.9)	(118.0)
Benefit plans (net of tax of $(0.3), $(0.1), $(0.7) and $(0.7), respectively)	0.3	0.4	1.0	1.4
Other comprehensive loss	(26.7)	(26.9)	(42.0)	(92.8)
Comprehensive income (loss) including noncontrolling interests	1.9	(42.8)	562.5	373.7
Add comprehensive loss (deduct comprehensive income) attributable to noncontrolling interests, principally in AmeriGas Partners	32.1	25.6	(196.0)	(174.5)
Comprehensive income (loss) attributable to UGI Corporation	$ 34.0	$ (17.2)	$ 366.5	$ 199.2