CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net (loss) income including noncontrolling interests	$ (789)	$ (7)	$ (1,633)	$ 831
Other comprehensive income (loss):
Net gains on derivative instruments (net of tax of $(10), $(3), $(5) and $(17), respectively)	22	8	10	42
Reclassifications of net (gains) losses on derivative instruments (net of tax of $4, $(1), $8 and $(4), respectively)	(10)	3	(20)	13
Foreign currency adjustments (net of tax of $2, $(17), $31 and $(30), respectively)	8	(106)	169	(191)
Benefit plans (net of tax of $1, $0, $1 and $(1), respectively)	(1)	0	(1)	3
Other comprehensive income (loss)	19	(95)	158	(133)
Comprehensive (loss) income including noncontrolling interests	(770)	(102)	(1,475)	698
Deduct comprehensive income attributable to noncontrolling interests	0	0	0	(2)
Comprehensive (loss) income attributable to UGI Corporation	$ (770)	$ (102)	$ (1,475)	$ 696