CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenues	$ 8,928,000,000	$ 10,106,000,000	$ 7,447,000,000
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	6,937,000,000	5,973,000,000	2,614,000,000
Operating and administrative expenses	2,158,000,000	2,028,000,000	2,014,000,000
Depreciation and amortization	532,000,000	518,000,000	502,000,000
Impairment of goodwill	656,000,000	0	0
Loss on disposal of UGI International energy marketing business	221,000,000	0	0
Other operating income, net	(132,000,000)	(79,000,000)	(33,000,000)
Total costs and expenses	10,372,000,000	8,440,000,000	5,097,000,000
Operating (loss) income	(1,444,000,000)	1,666,000,000	2,350,000,000
Income (loss) from equity investees	2,000,000	(14,000,000)	(63,000,000)
Loss on extinguishments of debt	(9,000,000)	(11,000,000)	0
Other non-operating (expense) income, net	(7,000,000)	75,000,000	12,000,000
Interest expense	(379,000,000)	(329,000,000)	(310,000,000)
(Loss) income before income taxes	(1,837,000,000)	1,387,000,000	1,989,000,000
Income tax benefit (expense)	335,000,000	(313,000,000)	(522,000,000)
Net (loss) income including noncontrolling interests	(1,502,000,000)	1,074,000,000	1,467,000,000
Deduct net income attributable to noncontrolling interests	0	(1,000,000)	0
Net (loss) income attributable to UGI Corporation	$ (1,502,000,000)	$ 1,073,000,000	$ 1,467,000,000
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)	$ (7.16)	$ 5.11	$ 7.02
Diluted (in dollars per share)	$ (7.16)	$ 4.97	$ 6.92
Weighted-average common shares outstanding:
Basic (in shares)	209,806	209,940	209,063
Diluted (in shares)	209,806	215,821	212,126