CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Total UGI stockholders’ equity	Common stock, without par value	Retained earnings	Retained earnings Revision of Prior Period, Accounting Standards Update, Adjustment	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests
Balance, beginning of period at Sep. 30, 2018			$ 1,200.8	$ 2,610.7	$ (7.1)	$ (110.4)	$ (19.7)	$ 418.6
Increase (Decrease) in Stockholders' Equity
Common Stock issued in connection with employee and director plans, net of tax withheld			10.7
Equity-based compensation expense			12.4
Reclassification of stranded income tax effects related to TCJA				6.6		(6.6)
Losses on common stock transactions in connection with employee and director plans				(13.9)
Net income	$ 438.7			307.7				131.0
Cash dividends on UGI Common Stock ($0.33, $0.30, $0.98, and $0.82, respectively)				(142.8)
Net losses on derivative instruments	(4.3)					(4.3)
Reclassification of net losses on derivative instruments	1.4					1.4
Benefit plans	0.8					0.8
Foreign currency adjustments	(26.3)					(26.3)
Common Stock issued in connection with employee and director plans, net of tax withheld							20.6
Repurchases of UGI Common Stock							(16.9)
Reacquired UGI Common Stock - employee and director plans							(2.8)
Dividends and distributions								(197.3)
Other								0.5
Balance, end of period at Jun. 30, 2019	4,173.7	$ 3,820.9	1,223.9	2,761.2		(145.4)	(18.8)	352.8
Balance, beginning of period at Mar. 31, 2019			1,219.0	2,818.2		(160.8)	(23.4)	463.0
Increase (Decrease) in Stockholders' Equity
Common Stock issued in connection with employee and director plans, net of tax withheld			1.3
Equity-based compensation expense			3.6
Losses on common stock transactions in connection with employee and director plans				(2.8)
Net income	(46.5)			(1.9)				(44.6)
Cash dividends on UGI Common Stock ($0.33, $0.30, $0.98, and $0.82, respectively)				(52.3)
Net losses on derivative instruments	(1.6)					(1.6)
Reclassification of net losses on derivative instruments	0.7					0.7
Benefit plans	0.2					0.2
Foreign currency adjustments	16.1					16.1
Common Stock issued in connection with employee and director plans, net of tax withheld							4.6
Dividends and distributions								(65.8)
Other								0.2
Balance, end of period at Jun. 30, 2019	4,173.7	3,820.9	1,223.9	2,761.2		(145.4)	(18.8)	352.8
Balance, beginning of period at Sep. 30, 2019	3,827.2		1,396.9	2,653.1		(216.6)	(15.9)	9.7
Increase (Decrease) in Stockholders' Equity
Common Stock issued in connection with employee and director plans, net of tax withheld			1.7
Equity-based compensation expense			14.9
Losses on common stock transactions in connection with employee and director plans				(2.8)
Net income	522.3			522.8				(0.5)
Cash dividends on UGI Common Stock ($0.33, $0.30, $0.98, and $0.82, respectively)				(204.4)
Net losses on derivative instruments	(37.6)					(37.6)
Reclassification of net losses on derivative instruments	6.0					6.0
Benefit plans	1.7					1.7
Foreign currency adjustments	41.9					41.9
Common Stock issued in connection with employee and director plans, net of tax withheld							4.9
Repurchases of UGI Common Stock							(38.3)
Reacquired UGI Common Stock - employee and director plans							(1.9)
Other			(0.7)	1.0				(0.5)
Balance, end of period at Jun. 30, 2020	4,135.4	4,126.7	1,412.8	2,969.7		(204.6)	(51.2)	8.7
Balance, beginning of period at Mar. 31, 2020			1,408.6	2,953.3		(229.7)	(51.7)	9.1
Increase (Decrease) in Stockholders' Equity
Equity-based compensation expense			4.2
Losses on common stock transactions in connection with employee and director plans				(0.1)
Net income	84.7			85.3				(0.6)
Cash dividends on UGI Common Stock ($0.33, $0.30, $0.98, and $0.82, respectively)				(68.8)
Net losses on derivative instruments	(7.6)					(7.6)
Reclassification of net losses on derivative instruments	4.7					4.7
Benefit plans	0.4					0.4
Foreign currency adjustments	27.6					27.6
Common Stock issued in connection with employee and director plans, net of tax withheld							0.5
Other								0.2
Balance, end of period at Jun. 30, 2020	$ 4,135.4	$ 4,126.7	$ 1,412.8	$ 2,969.7		$ (204.6)	$ (51.2)	$ 8.7