CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income attributable to UGI Corporation	$ 1,074	$ 1,467	$ 532
Net gains (losses) on derivative instruments (net of tax of $(27), $(1), and $15, respectively)	64	3	(38)
Reclassifications of net losses on derivative instruments (net of tax of $(1), $(7), and $(4), respectively)	6	18	9
Foreign currency translation adjustments (net of tax of $(55), $(4), and $12, respectively)	(193)	(11)	15
Foreign currency (losses) gains on long-term intra-company transactions	(148)	(12)	84
Benefit plans, principally actuarial gains (losses) (net of tax of $(10), $(3), and $1, respectively)	28	7	(3)
Reclassifications of benefit plans actuarial losses and net prior service benefit (net of tax of $(1), $(1), and $(1), respectively)	3	2	3
Other comprehensive (loss) income	(240)	7	70
Comprehensive income including noncontrolling interests	834	1,474	602
Deduct comprehensive income attributable to noncontrolling interests	(1)	0	0
Comprehensive income attributable to UGI Corporation	$ 833	$ 1,474	$ 602