CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income attributable to UGI Corporation	$ 303	$ 212
Other comprehensive income:
Net gains on derivative instruments (net of tax of $0 and $(2), respectively)	0	6
Reclassifications of net losses on derivative instruments (net of tax of $(2) and $0, respectively)	5	1
Foreign currency adjustments (net of tax of $12 and $7, respectively)	63	47
Other comprehensive income	68	54
Comprehensive income attributable to UGI Corporation	$ 371	$ 266