CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Total UGI stockholders’ equity	Common stock, without par value	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests
Balance, beginning of period at Sep. 30, 2019			$ 1,397	$ 2,653	$ (217)	$ (16)	$ 10
Increase (Decrease) in Stockholders' Equity
Equity-based compensation expense			2
Net income attributable to UGI Corporation	$ 212			212
Cash dividends on UGI Common Stock ($0.33, and $0.325, respectively)				(68)
Net gains on derivative instruments	6				6
Reclassification of net losses on derivative instruments	1				1
Foreign currency adjustments	47				47
Common Stock issued in connection with employee and director plans, net of tax withheld						2
Repurchases of UGI Common Stock						(23)
Other			(1)	1			(1)
Balance, end of period at Dec. 31, 2019	4,005	$ 3,996	1,398	2,798	(163)	(37)	9
Balance, beginning of period at Sep. 30, 2020	4,137		1,416	2,908	(147)	(49)	9
Increase (Decrease) in Stockholders' Equity
Common Stock issued in connection with employee and director plans, net of tax withheld			1
Equity-based compensation expense			2
Losses on common stock transactions in connection with employee and director plans				(3)
Net income attributable to UGI Corporation	303			303
Cash dividends on UGI Common Stock ($0.33, and $0.325, respectively)				(69)
Net gains on derivative instruments	0
Reclassification of net losses on derivative instruments	5				5
Foreign currency adjustments	63				63
Common Stock issued in connection with employee and director plans, net of tax withheld						7
Balance, end of period at Dec. 31, 2020	$ 4,446	$ 4,437	$ 1,419	$ 3,139	$ (79)	$ (42)	$ 9