CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net (loss) income including noncontrolling interests	$ (48)	$ (789)	$ 542	$ (1,633)
Other comprehensive (loss) income:
Net gains on derivative instruments (net of tax of $(3), $(10), $(1) and $(5), respectively)	4	22	1	10
Reclassifications of net gains on derivative instruments (net of tax of $4, $4, $12 and $8, respectively)	(9)	(10)	(28)	(20)
Foreign currency adjustments (net of tax of $(2), $2, $3 and $31, respectively)	(10)	8	15	169
Benefit plans (net of tax of $0, $1, $0 and $1, respectively)	0	(1)	(1)	(1)
Other comprehensive (loss) income	(15)	19	(13)	158
Comprehensive (loss) income attributable to UGI Corporation	$ (63)	$ (770)	$ 529	$ (1,475)