CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues	$ 2,228.9	$ 2,606.1	$ 4,235.5	$ 4,806.3
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	1,248.2	1,426.9	2,256.2	2,851.9
Operating and administrative expenses	503.4	536.7	1,014.6	1,039.9
Depreciation and amortization	120.2	108.9	239.6	220.1
Other operating income, net	(4.8)	(5.2)	(14.0)	(12.1)
Total cost and expenses	1,867.0	2,067.3	3,496.4	4,099.8
Operating income	361.9	538.8	739.1	706.5
Income from equity investees	8.0	1.6	14.5	3.1
Loss on extinguishments of debt	0.0	0.0	0.0	(6.1)
Other non-operating income, net	11.7	7.9	0.2	16.9
Interest expense	(82.4)	(61.0)	(166.5)	(121.2)
Income before income taxes	299.2	487.3	587.3	599.2
Income tax expense	(73.6)	(90.6)	(149.7)	(114.0)
Net income including noncontrolling interests	225.6	396.7	437.6	485.2
Deduct net income attributable to noncontrolling interests, principally in AmeriGas Partners prior to the AmeriGas Merger	(0.1)	(151.3)	(0.1)	(175.6)
Net income attributable to UGI Corporation	$ 225.5	$ 245.4	$ 437.5	$ 309.6
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in USD per share)	$ 1.08	$ 1.41	$ 2.09	$ 1.77
Diluted (in USD per share)	$ 1.07	$ 1.38	$ 2.08	$ 1.74
Weighted-average common shares outstanding (thousands):
Basic (in shares)	208,941	174,501	209,151	174,461
Diluted (in shares)	209,808	177,318	210,494	177,446