Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016		Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues	$ 2,173.8	$ 1,972.1	[1]	$ 3,853.3	$ 3,578.7	[1]
Costs and expenses:
Cost of sales (excluding depreciation shown below)	1,071.2	776.9	[1]	1,718.6	1,510.9	[1]
Operating and administrative expenses	486.2	481.0		951.0	945.1
Utility taxes other than income taxes	4.9	4.4		8.6	8.2
Depreciation	84.8	83.4		168.5	169.1
Amortization	14.5	17.3		28.9	32.2
Other operating income, net	(1.0)	(6.3)		(1.7)	(7.7)
Total costs and expenses	1,660.6	1,356.7		2,873.9	2,657.8
Operating income	513.2	615.4	[1]	979.4	920.9	[1]
Income (loss) from equity investees	2.3	0.0		2.1	(0.1)	[1]
Loss on extinguishments of debt	(22.1)	0.0		(55.3)	0.0
(Losses) gains on foreign currency contracts, net	(1.2)	0.0		0.1	0.0
Interest expense	(55.8)	(57.3)	[1]	(111.2)	(115.2)	[1]
Income before income taxes	436.4	558.1	[1]	815.1	805.6	[1]
Income tax expense	(124.6)	(150.1)		(212.4)	(229.7)
Net income including noncontrolling interests	311.8	408.0		602.7	575.9
Deduct net income attributable to noncontrolling interests, principally in AmeriGas Partners	(91.9)	(174.8)	[1]	(152.1)	(228.1)	[1]
Net income attributable to UGI Corporation	$ 219.9	$ 233.2		$ 450.6	$ 347.8
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)	$ 1.27	$ 1.35		$ 2.60	$ 2.01
Diluted (in dollars per share)	$ 1.24	$ 1.33		$ 2.55	$ 1.99
Weighted average common shares outstanding (thousands):
Basic (in shares)	173,624	172,619		173,567	172,733
Diluted (in shares)	177,136	174,845		176,976	174,953
Dividends declared per common share (in dollars per share)	$ 0.2375	$ 0.2275		$ 0.475	$ 0.4550

[1] Restated to reflect (1) the current-year changes in the presentation of our UGI International and Midstream & Marketing reportable segments and (2) the adoption of new accounting guidance related to debt issuance costs (see Note 2).