CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Total UGI stockholders’ equity	Preferred stock, without par value	Common stock, without par value	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests
Balance, beginning of period at Sep. 30, 2019			$ 0	$ 1,397	$ 2,653	$ (217)	$ (16)	$ 10
Increase (Decrease) in Stockholders' Equity
Common Stock issued in connection with employee and director plans, net of tax withheld				2
Equity-based compensation expense				15
Losses on common stock transactions in connection with employee and director plans					(3)
Net income attributable to UGI Corporation	$ 523				523
Cash dividends on UGI Common Stock ($0.35, $0.33, $1.01, and $0.980, respectively)					(204)
Net (losses) gains on derivative instruments	(38)					(38)
Reclassification of net losses on derivative instruments	6					6
Benefit plans	2					2
Foreign currency adjustments	42					42
Common Stock issued in connection with employee and director plans, net of tax withheld							5
Repurchases of UGI Common Stock							(38)
Reacquired UGI Common Stock - employee and director plans							(3)
Other				(1)	1			(1)
Balance, end of period at Jun. 30, 2020	4,135	$ 4,126	0	1,413	2,970	(205)	(52)	9
Balance, beginning of period at Mar. 31, 2020			0	1,409	2,953	(230)	(51)	9
Increase (Decrease) in Stockholders' Equity
Equity-based compensation expense				4
Net income attributable to UGI Corporation	85				85
Cash dividends on UGI Common Stock ($0.35, $0.33, $1.01, and $0.980, respectively)					(68)
Net (losses) gains on derivative instruments	(8)					(8)
Reclassification of net losses on derivative instruments	5					5
Benefit plans	0
Foreign currency adjustments	28					28
Common Stock issued in connection with employee and director plans, net of tax withheld							1
Reacquired UGI Common Stock - employee and director plans							(2)
Balance, end of period at Jun. 30, 2020	4,135	4,126	0	1,413	2,970	(205)	(52)	9
Balance, beginning of period at Sep. 30, 2020	4,137		0	1,416	2,908	(147)	(49)	9
Increase (Decrease) in Stockholders' Equity
Issuance of preferred stock			213	(45)
Common Stock issued in connection with employee and director plans, net of tax withheld				6
Equity-based compensation expense				13
Losses on common stock transactions in connection with employee and director plans					(11)
Net income attributable to UGI Corporation	942				942
Cash dividends on UGI Common Stock ($0.35, $0.33, $1.01, and $0.980, respectively)					(210)
Net (losses) gains on derivative instruments	4					4
Reclassification of net losses on derivative instruments	14					14
Benefit plans	1					1
Foreign currency adjustments	23					23
Common Stock issued in connection with employee and director plans, net of tax withheld							22
Reacquired UGI Common Stock - employee and director plans							(1)
Other				(2)
Balance, end of period at Jun. 30, 2021	5,106	5,097	213	1,388	3,629	(105)	(28)	9
Balance, beginning of period at Mar. 31, 2021			0	1,428	3,557	(126)	(40)	9
Increase (Decrease) in Stockholders' Equity
Issuance of preferred stock			213	(45)
Common Stock issued in connection with employee and director plans, net of tax withheld				3
Equity-based compensation expense				4
Losses on common stock transactions in connection with employee and director plans					(6)
Net income attributable to UGI Corporation	150				150
Cash dividends on UGI Common Stock ($0.35, $0.33, $1.01, and $0.980, respectively)					(72)
Net (losses) gains on derivative instruments	0
Reclassification of net losses on derivative instruments	5					5
Benefit plans	0
Foreign currency adjustments	16					16
Common Stock issued in connection with employee and director plans, net of tax withheld							12
Other				(2)
Balance, end of period at Jun. 30, 2021	$ 5,106	$ 5,097	$ 213	$ 1,388	$ 3,629	$ (105)	$ (28)	$ 9