CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues	$ 2,606.1	$ 2,812.0	$ 4,806.3	$ 4,937.2
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	1,426.9	1,560.2	2,851.9	2,697.6
Operating and administrative expenses	536.7	554.7	1,039.9	1,041.6
Depreciation and amortization	108.9	112.2	220.1	222.5
Other operating income, net	(5.2)	(6.1)	(12.1)	(10.5)
Total costs and expenses	2,067.3	2,221.0	4,099.8	3,951.2
Operating income	538.8	591.0	706.5	986.0
Income from equity investees	1.6	0.7	3.1	1.7
Loss on extinguishments of debt	0.0	0.0	(6.1)	0.0
Other non-operating income, net	7.9	(12.5)	16.9	(20.5)
Interest expense	(61.0)	(58.1)	(121.2)	(116.3)
Income (loss) before income taxes	487.3	521.1	599.2	850.9
Income tax expense	(90.6)	(113.4)	(114.0)	(9.0)
Net income including noncontrolling interests	396.7	407.7	485.2	841.9
Deduct net income attributable to noncontrolling interests, principally in AmeriGas Partners	(151.3)	(131.7)	(175.6)	(200.0)
Net income attributable to UGI Corporation	$ 245.4	$ 276.0	$ 309.6	$ 641.9
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in USD per share)	$ 1.41	$ 1.59	$ 1.77	$ 3.70
Diluted (in USD per share)	$ 1.38	$ 1.57	$ 1.74	$ 3.63
Weighted-average common shares outstanding (thousands):
Basic (in shares)	174,501	173,570	174,461	173,617
Diluted (in shares)	177,318	176,350	177,446	176,646
Dividends declared per common share (in USD per share)	$ 0.26	$ 0.25	$ 0.52	$ 0.5