CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interests	$ 496	$ 110	$ 590	$ (844)
Other comprehensive income (loss):
Net gains (losses) on derivative instruments (net of tax of $(5), $6, $2 and $5, respectively)	12	(15)	(3)	(12)
Reclassifications of net gains on derivative instruments (net of tax of $5, $2, $8 and $4, respectively)	(9)	(5)	(19)	(10)
Foreign currency adjustments (net of tax of $(7), $(1), $5 and $29, respectively)	(24)	10	25	161
Benefit plans (net of tax of $0, $0, $0 and $0, respectively)	(1)	0	(1)	0
Other comprehensive (loss) income	(22)	(10)	2	139
Comprehensive income (loss) attributable to UGI Corporation	$ 474	$ 100	$ 592	$ (705)