Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenues	$ 2,200.2	$ 2,125.2
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	1,425.0	1,137.4
Operating and administrative expenses	503.2	486.9
Depreciation and amortization	111.2	110.3
Other operating income, net	(6.9)	(4.4)
Total costs and expenses	2,032.5	1,730.2
Operating income	167.7	395.0
Income from equity investees	1.5	1.0
Loss on extinguishments of debt	(6.1)	0.0
Other non-operating income (expense), net	9.0	(8.0)
Interest expense	(60.2)	(58.2)
(Loss) income before income taxes	111.9	329.8
Income tax (expense) benefit	(23.4)	104.4
Net income including noncontrolling interests	88.5	434.2
Deduct net income attributable to noncontrolling interests, principally in AmeriGas Partners	(24.3)	(68.3)
Net income attributable to UGI Corporation	$ 64.2	$ 365.9
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in USD per share)	$ 0.37	$ 2.11
Diluted (in USD per share)	$ 0.36	$ 2.07
Weighted-average common shares outstanding (thousands):
Basic (in shares)	174,413	173,670
Diluted (in shares)	177,566	176,948
Dividends declared per common share (in USD per share)	$ 0.26	$ 0.25