CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Total UGI Corporation stockholders’ equity	Common stock, without par value	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests
Balance, beginning of year at Sep. 30, 2016			$ 1,201.6	$ 1,834.1	$ (154.7)	$ (36.9)	$ 750.9
Common stock issued:
Employee and director plans (including losses on treasury stock transactions), net of tax withheld			(28.2)
Employee and director plans, net of tax withheld						49.6
Equity-based compensation expense			13.2
Net income including noncontrolling interests	$ 523.8			436.6			87.2
Cash dividends on common stock ($1.145, $1.02, and $0.975 per share, respectively)				(168.9)
Reclassification of stranded income tax effects related to TCJA				0.0	0.0
Losses on treasury stock transactions in connection with employee and director plans				0.0
Net (losses) gains on derivative instruments	1.7				1.7
Reclassifications of net losses (gains) on derivative instruments (net of tax of $(0.7), $(2.6), and $4.1, respectively)	(9.7)				(9.7)
Benefit plans, principally actuarial (losses) gains	6.5				6.5
Reclassification of benefit plans actuarial losses and net prior service benefits	3.4				3.4
Foreign currency (losses) gains on long-term intra-company transactions	24.8				24.8
Foreign currency translation adjustments	34.6				34.6
Repurchases of common stock						(43.3)
Reacquired common stock – employee and director plans						(8.2)
Sale of treasury stock			2.0			0.2
Dividends and distributions							(261.6)
AmeriGas Merger-related adjustments			0.0				0.0
Other							1.1
Balance, end of year at Sep. 30, 2017	3,740.9	$ 3,163.3	1,188.6	2,106.7	(93.4)	(38.6)	577.6
Common stock issued:
Employee and director plans (including losses on treasury stock transactions), net of tax withheld			(1.5)
Employee and director plans, net of tax withheld						86.5
Equity-based compensation expense			13.7
Net income including noncontrolling interests	822.4			718.7			103.7
Cash dividends on common stock ($1.145, $1.02, and $0.975 per share, respectively)				(176.9)
Reclassification of stranded income tax effects related to TCJA				0.0	0.0
Losses on treasury stock transactions in connection with employee and director plans				(37.8)
Net (losses) gains on derivative instruments	1.0				1.0
Reclassifications of net losses (gains) on derivative instruments (net of tax of $(0.7), $(2.6), and $4.1, respectively)	4.3				4.3
Benefit plans, principally actuarial (losses) gains	10.4				10.4
Reclassification of benefit plans actuarial losses and net prior service benefits	(2.2)				(2.2)
Foreign currency (losses) gains on long-term intra-company transactions	(9.1)				(9.1)
Foreign currency translation adjustments	(21.4)				(21.4)
Repurchases of common stock						(59.8)
Reacquired common stock – employee and director plans						(7.8)
Sale of treasury stock			0.0			0.0
Dividends and distributions							(263.3)
AmeriGas Merger-related adjustments			0.0				0.0
Other							0.6
Balance, end of year at Sep. 30, 2018	4,100.0	3,681.4	1,200.8	2,610.7	(110.4)	(19.7)	418.6
Balance, beginning of year at Sep. 30, 2018	4,100.0	3,681.4	1,200.8	2,610.7	(110.4)	(19.7)	418.6
Common stock issued:
Employee and director plans (including losses on treasury stock transactions), net of tax withheld			11.2
Employee and director plans, net of tax withheld						23.5
Equity-based compensation expense			14.6
Net income including noncontrolling interests	307.9			256.2			51.7
Cash dividends on common stock ($1.145, $1.02, and $0.975 per share, respectively)				(199.5)
Reclassification of stranded income tax effects related to TCJA				6.6	(6.6)
Losses on treasury stock transactions in connection with employee and director plans				(13.8)
Net (losses) gains on derivative instruments	(7.3)				(7.3)
Reclassifications of net losses (gains) on derivative instruments (net of tax of $(0.7), $(2.6), and $4.1, respectively)	1.7				1.7
Benefit plans, principally actuarial (losses) gains	(13.0)				(13.0)
Reclassification of benefit plans actuarial losses and net prior service benefits	1.2				1.2
Foreign currency (losses) gains on long-term intra-company transactions	(59.0)				(59.0)
Foreign currency translation adjustments	(23.2)				(23.2)
Repurchases of common stock						(16.9)
Reacquired common stock – employee and director plans						(2.8)
Sale of treasury stock			0.0			0.0
Dividends and distributions							(263.1)
AmeriGas Merger-related adjustments			170.3				(198.7)
Other							1.2
Balance, end of year at Sep. 30, 2019	$ 3,827.2	$ 3,817.5	$ 1,396.9	2,653.1	$ (216.6)	$ (15.9)	$ 9.7
Common stock issued:
Cumulative effect of change in accounting | ASC 606				(7.1)
Cumulative effect of change in accounting | Employee share-based payments				$ 0.0