CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interests	$ 94	$ (954)
Other comprehensive income (loss):
Net (losses) gains on derivative instruments (net of tax of $7 and $(1), respectively)	(15)	3
Reclassifications of net gains on derivative instruments (net of tax of $3 and $2, respectively)	(10)	(5)
Foreign currency adjustments (net of tax of $12 and $30, respectively)	49	151
Other comprehensive income	24	149
Comprehensive income (loss) attributable to UGI Corporation	$ 118	$ (805)