CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (unaudited) - USD ($) $ in Millions	Total	Total UGI stockholders’ equity	Preferred stock, without par value	Preferred stock, without par value Cumulative effect of change in accounting - ASU 2020-06 (Note 3)	Common stock, without par value	Common stock, without par value Cumulative effect of change in accounting - ASU 2020-06 (Note 3)	Retained earnings	Retained earnings Cumulative effect of change in accounting - ASU 2020-06 (Note 3)	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests
Balance, beginning of period at Sep. 30, 2021			$ 213	$ 1	$ 1,394		$ 4,081	$ (1)	$ (140)	$ (26)	$ 9
Increase (Decrease) in Stockholders' Equity
Other			(52)		53						(2)
Common Stock issued in connection with employee and director plans, net of tax withheld					13
Equity-based compensation expense					14
Losses on common stock transactions in connection with employee and director plans							(15)
Net (loss) income attributable to UGI Corporation	$ 829						829
Cash dividends on UGI Common Stock ($0.375, $0.36, $1.095 and $1.05, respectively)							(220)
Net gains on derivative instruments	42								42
Reclassification of net (gains) losses on derivative instruments	13								13
Benefit plans	3								3
Foreign currency adjustments	(191)								(191)
Common Stock issued in connection with employee and director plans, net of tax withheld										33
Repurchases of UGI Common Stock										(38)
Reacquired UGI Common Stock - employee and director plans										(10)
Net income attributable to noncontrolling interests	831										2
Balance, end of period at Jun. 30, 2022	6,005	$ 5,996	162		1,474		4,674		(273)	(41)	9
Balance, beginning of period at Sep. 30, 2021			213	1	1,394		4,081	(1)	(140)	(26)	9
Balance, end of period at Sep. 30, 2022	$ 6,074		162	5	1,483	$ (6)	4,841	1	(380)	(40)	8
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	Accounting Standards Update 2020-06 [Member]
Balance, beginning of period at Mar. 31, 2022			161	1	1,465		4,757	(1)	(178)	(5)	10
Increase (Decrease) in Stockholders' Equity
Other											(1)
Common Stock issued in connection with employee and director plans, net of tax withheld					5
Equity-based compensation expense					4
Net (loss) income attributable to UGI Corporation	$ (7)						(7)
Cash dividends on UGI Common Stock ($0.375, $0.36, $1.095 and $1.05, respectively)							(75)
Net gains on derivative instruments	8								8
Reclassification of net (gains) losses on derivative instruments	3								3
Benefit plans	0
Foreign currency adjustments	(106)								(106)
Common Stock issued in connection with employee and director plans, net of tax withheld										3
Repurchases of UGI Common Stock										(38)
Reacquired UGI Common Stock - employee and director plans										(1)
Net income attributable to noncontrolling interests	(7)
Balance, end of period at Jun. 30, 2022	6,005	5,996	162		1,474		4,674		(273)	(41)	9
Balance, beginning of period at Sep. 30, 2022	6,074		162	$ 5	1,483	$ (6)	4,841	$ 1	(380)	(40)	8
Increase (Decrease) in Stockholders' Equity
Other											1
Common Stock issued in connection with employee and director plans, net of tax withheld					9
Equity-based compensation expense					14
Losses on common stock transactions in connection with employee and director plans							(5)
Net (loss) income attributable to UGI Corporation	(1,633)						(1,633)
Cash dividends on UGI Common Stock ($0.375, $0.36, $1.095 and $1.05, respectively)							(230)
Net gains on derivative instruments	10								10
Reclassification of net (gains) losses on derivative instruments	(20)								(20)
Benefit plans	(1)								(1)
Foreign currency adjustments	169								169
Common Stock issued in connection with employee and director plans, net of tax withheld										7
Repurchases of UGI Common Stock										(22)
Net income attributable to noncontrolling interests	(1,633)
Balance, end of period at Jun. 30, 2023	4,373	4,364	167		1,500		2,974		(222)	(55)	9
Balance, beginning of period at Mar. 31, 2023			167		1,492		3,842		(241)	(55)	9
Increase (Decrease) in Stockholders' Equity
Common Stock issued in connection with employee and director plans, net of tax withheld					3
Equity-based compensation expense					5
Net (loss) income attributable to UGI Corporation	(789)						(789)
Cash dividends on UGI Common Stock ($0.375, $0.36, $1.095 and $1.05, respectively)							(79)
Net gains on derivative instruments	22								22
Reclassification of net (gains) losses on derivative instruments	(10)								(10)
Benefit plans	(1)								(1)
Foreign currency adjustments	8								8
Net income attributable to noncontrolling interests	(789)
Balance, end of period at Jun. 30, 2023	$ 4,373	$ 4,364	$ 167		$ 1,500		$ 2,974		$ (222)	$ (55)	$ 9