CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues	$ 1,363.7	$ 1,440.9	$ 6,170.0	$ 6,378.1
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	781.4	732.5	3,633.3	3,430.1
Operating and administrative expenses	476.9	495.1	1,516.8	1,536.7
Impairment of Partnership tradenames and trademarks	0.0	75.0	0.0	75.0
Depreciation and amortization	109.9	118.8	330.0	341.3
Other operating income, net	(14.1)	(10.0)	(26.2)	(20.5)
Total costs and expenses	1,354.1	1,411.4	5,453.9	5,362.6
Operating income	9.6	29.5	716.1	1,015.5
Income from equity investees	1.5	1.3	4.6	3.0
Loss on extinguishments of debt	0.0	0.0	(6.1)	0.0
Other non-operating income, net	0.7	24.6	17.6	4.1
Interest expense	(60.5)	(56.5)	(181.7)	(172.8)
(Loss) income before income taxes	(48.7)	(1.1)	550.5	849.8
Income tax benefit (expense)	2.2	(10.6)	(111.8)	(19.6)
Net (loss) income including noncontrolling interests	(46.5)	(11.7)	438.7	830.2
Add net loss (deduct net income) attributable to noncontrolling interests, principally in AmeriGas Partners	44.6	64.1	(131.0)	(135.9)
Net (loss) income attributable to UGI Corporation	$ (1.9)	$ 52.4	$ 307.7	$ 694.3
(Loss) earnings per common share attributable to UGI Corporation stockholders:
Basic (in USD per share)	$ (0.01)	$ 0.30	$ 1.76	$ 4.00
Diluted (in USD per share)	$ (0.01)	$ 0.30	$ 1.73	$ 3.93
Weighted-average common shares outstanding (thousands):
Basic (in shares)	174,759	173,991	174,541	173,744
Diluted (in shares)	174,759	176,807	177,389	176,702
Dividends declared per common share (in USD per share)	$ 0.30	$ 0.26	$ 0.82	$ 0.76