CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues	$ 3,466	$ 2,581	$ 6,139	$ 4,513
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	1,470	1,274	3,590	2,107
Operating and administrative expenses	553	515	1,067	1,004
Depreciation and amortization	128	126	257	250
Other operating income, net	(17)	(5)	(39)	(21)
Costs and expenses	2,134	1,910	4,875	3,340
Operating income	1,332	671	1,264	1,173
Income from equity investees	5	10	13	17
Loss on extinguishment of debt	0	0	(11)	0
Other non-operating income (expense), net	11	18	21	(1)
Interest expense	(82)	(78)	(163)	(156)
Income before income taxes	1,266	621	1,124	1,033
Income tax expense	(332)	(132)	(286)	(241)
Net income including noncontrolling interests	934	489	838	792
Deduct net income attributable to noncontrolling interests	(1)	0	(2)	0
Net income attributable to UGI Corporation	$ 933	$ 489	$ 836	$ 792
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in USD per share)	$ 4.44	$ 2.34	$ 3.98	$ 3.79
Diluted (in USD per share)	$ 4.32	$ 2.33	$ 3.87	$ 3.77
Weighted-average common shares outstanding (thousands):
Basic (in shares)	210,163	208,930	209,919	208,849
Diluted (in shares)	215,928	210,092	215,936	209,863