CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues	$ 2,033	$ 1,496	$ 8,172	$ 6,009
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	1,361	516	4,951	2,623
Operating and administrative expenses	465	469	1,532	1,473
Depreciation and amortization	130	125	387	375
Other operating income, net	(22)	(5)	(61)	(26)
Costs and expenses	1,934	1,105	6,809	4,445
Operating income	99	391	1,363	1,564
Loss from equity investees	(45)	(86)	(32)	(69)
Loss on extinguishment of debt	0	0	(11)	0
Other non-operating income, net	20	1	41	0
Interest expense	(82)	(77)	(245)	(233)
(Loss) income before income taxes	(8)	229	1,116	1,262
Income tax benefit (expense)	1	(79)	(285)	(320)
Net (loss) income including noncontrolling interests	(7)	150	831	942
Deduct net income attributable to noncontrolling interests	0	0	(2)	0
Net (loss) income attributable to UGI Corporation	$ (7)	$ 150	$ 829	$ 942
(Loss) earnings per common share attributable to UGI Corporation stockholders:
Basic (in USD per share)	$ (0.03)	$ 0.72	$ 3.95	$ 4.51
Diluted (in USD per share)	$ (0.03)	$ 0.71	$ 3.84	$ 4.48
Weighted-average common shares outstanding (thousands):
Basic (in shares)	210,190	209,099	209,992	208,934
Diluted (in shares)	210,190	210,851	215,965	210,194