CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interests	$ 110	$ 934	$ (844)	$ 838
Other comprehensive income (loss):
Net (losses) gains on derivative instruments (net of tax of $6, $(12), $5 and $(14), respectively)	(15)	24	(12)	34
Reclassifications of net (gains) losses on derivative instruments (net of tax of $2, $(1), $4 and $(3), respectively)	(5)	6	(10)	10
Foreign currency adjustments (net of tax of $(1), $(9), $29 and $(13), respectively)	10	(53)	161	(85)
Benefit plans (net of tax of $0, $0, $0 and $(1), respectively)	0	1	0	3
Other comprehensive (loss) income	(10)	(22)	139	(38)
Comprehensive income (loss) including noncontrolling interests	100	912	(705)	800
Deduct comprehensive income attributable to noncontrolling interests	0	(1)	0	(2)
Comprehensive income (loss) attributable to UGI Corporation	$ 100	$ 911	$ (705)	$ 798