CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenues	$ 2,121	$ 2,759
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	1,202	3,106
Operating and administrative expenses	530	529
Depreciation and amortization	137	131
Loss on disposal of UGI International energy marketing business	28	215
Other operating income, net	(8)	(18)
Costs and expenses	1,889	3,963
Operating income (loss)	232	(1,204)
Income from equity investees	1	1
Other non-operating expense, net	(13)	(28)
Interest expense	(100)	(92)
Income (loss) before income taxes	120	(1,323)
Income tax (expense) benefit	(26)	369
Net income (loss) attributable to UGI Corporation	$ 94	$ (954)
Earnings (loss) per common share attributable to UGI Corporation stockholders:
Basic (in USD per share)	$ 0.45	$ (4.54)
Diluted (in USD per share)	$ 0.44	$ (4.54)
Weighted-average common shares outstanding (thousands):
Basic (in shares)	209,782	209,934
Diluted (in shares)	215,570	209,934