Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues	$ 1,153.5	$ 1,130.8	$ 5,006.8	$ 4,709.5
Costs and expenses:
Cost of sales (excluding depreciation shown below)	618.5	433.0	2,337.1	1,943.9
Operating and administrative expenses	445.7	445.5	1,396.7	1,390.6
Utility taxes other than income taxes	3.7	4.0	12.3	12.2
Depreciation	89.6	82.8	258.1	251.9
Amortization	14.5	15.3	43.4	47.5
Other operating income, net	(15.7)	(5.5)	(17.4)	(13.2)
Total costs and expenses	1,156.3	975.1	4,030.2	3,632.9
Operating (loss) income	(2.8)	155.7	976.6	1,076.6
Income (loss) from equity investees	0.9	0.0	3.0	(0.1)
Loss on extinguishments of debt	(4.4)	(37.1)	(59.7)	(37.1)
Losses on foreign currency contracts, net	(16.2)	0.0	(16.1)	0.0
Interest expense	(56.8)	(56.4)	(168.0)	(171.6)
Income (loss) before income taxes	(79.3)	62.2	735.8	867.8
Income tax benefit (expense)	17.1	(33.6)	(195.3)	(263.3)
Net (loss) income including noncontrolling interests	(62.2)	28.6	540.5	604.5
Add net loss (deduct net income) attributable to noncontrolling interests, principally in AmeriGas Partners	43.2	32.1	(108.9)	(196.0)
Net (loss) income attributable to UGI Corporation	$ (19.0)	$ 60.7	$ 431.6	$ 408.5
(Loss) earnings per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)	$ (0.11)	$ 0.35	$ 2.49	$ 2.36
Diluted (in dollars per share)	$ (0.11)	$ 0.34	$ 2.44	$ 2.33
Weighted average common shares outstanding (thousands):
Basic (in shares)	173,742	173,395	173,625	172,954
Diluted (in shares)	173,742	175,974	177,125	175,260
Dividends declared per common share (in dollars per share)	$ 0.25	$ 0.2375	$ 0.725	$ 0.6925