CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 1,659	$ 2,033	$ 7,524	$ 8,172
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	1,104	1,361	6,358	4,951
Operating and administrative expenses	523	465	1,639	1,532
Depreciation and amortization	134	130	397	387
Impairment of goodwill	656	0	656	0
Loss on disposal of U.K. energy marketing business	0	0	215	0
Other operating income, net	(26)	(22)	(60)	(61)
Costs and expenses	2,391	1,934	9,205	6,809
Operating (loss) income	(732)	99	(1,681)	1,363
Income (loss) from equity investees	1	(45)	2	(32)
Loss on extinguishments of debt	(9)	0	(9)	(11)
Other non-operating income (expense), net	1	20	(25)	41
Interest expense	(96)	(82)	(281)	(245)
(Loss) income before income taxes	(835)	(8)	(1,994)	1,116
Income tax benefit (expense)	46	1	361	(285)
Net (loss) income including noncontrolling interests	(789)	(7)	(1,633)	831
Deduct net income attributable to noncontrolling interests	0	0	0	(2)
Net (loss) income attributable to UGI Corporation	$ (789)	$ (7)	$ (1,633)	$ 829
(Loss) earnings per common share attributable to UGI Corporation stockholders:
Basic (in USD per share)	$ (3.76)	$ (0.03)	$ (7.78)	$ 3.95
Diluted (in USD per share)	$ (3.76)	$ (0.03)	$ (7.78)	$ 3.84
Weighted-average common shares outstanding (thousands):
Basic (in shares)	209,706	210,190	209,811	209,992
Diluted (in shares)	209,706	210,190	209,811	215,965