CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenues	$ 7,287	$ 7,210	$ 8,928
Costs and expenses:
Cost of sales	3,654	3,529	6,937
Operating and administrative expenses	2,011	2,132	2,158
Depreciation and amortization	561	551	532
Impairment of goodwill	0	195	656
(Gain) loss on disposals of businesses	36	95	221
Other operating expense (income), net	(82)	(62)	(132)
Total costs and expenses	6,180	6,440	10,372
Operating income (loss)	1,107	770	(1,444)
Income (loss) from equity investees	5	(19)	2
Loss on extinguishments of debt	(10)	(9)	(9)
Other non-operating income (expense), net	5	(8)	(7)
Interest expense	(411)	(394)	(379)
Income (loss) before income taxes	696	340	(1,837)
Income tax benefit (expense)	(18)	(71)	335
Net income (loss) attributable to UGI Corporation	$ 678	$ 269	$ (1,502)
Earnings (loss) per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)	$ 3.15	$ 1.27	$ (7.16)
Diluted (in dollars per share)	$ 3.09	$ 1.25	$ (7.16)
Weighted-average common shares outstanding (thousands):
Basic (in shares)	214,945	211,309	209,806
Diluted (in shares)	219,160	215,271	209,806