CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss including noncontrolling interests	$ (954)	$ (96)
Other comprehensive income (loss):
Net gains on derivative instruments (net of tax of $(1) and $(2), respectively)	3	10
Reclassifications of net (gains) losses on derivative instruments (net of tax of $2 and $(2), respectively)	(5)	4
Foreign currency adjustments (net of tax of $30 and $(4), respectively)	151	(32)
Benefit plans (net of tax of $0 and $(1), respectively)	0	2
Other comprehensive income (loss)	149	(16)
Comprehensive loss including noncontrolling interests	(805)	(112)
Deduct comprehensive income attributable to noncontrolling interests	0	(1)
Comprehensive loss attributable to UGI Corporation	$ (805)	$ (113)