CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenues	$ 10,106	$ 7,447	$ 6,559
Costs and expenses:
Cost of sales (excluding depreciation and amortization shown below)	5,973	2,614	3,149
Operating and administrative expenses	2,028	2,014	1,911
Loss on disposals of Conemaugh and HVAC	0	0	54
Depreciation and amortization	518	502	484
Other operating income, net	(79)	(33)	(21)
Total costs and expenses	8,440	5,097	5,577
Operating income	1,666	2,350	982
(Loss) income from equity investees	(14)	(63)	27
Loss on extinguishment of debt	(11)	0	0
Other non-operating income (expense), net	75	12	(20)
Interest expense	(329)	(310)	(322)
Income before income taxes	1,387	1,989	667
Income tax expense	(313)	(522)	(135)
Net income including noncontrolling interests	1,074	1,467	532
Deduct net income attributable to noncontrolling interests	(1)	0	0
Net income attributable to UGI Corporation	$ 1,073	$ 1,467	$ 532
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)	$ 5.11	$ 7.02	$ 2.55
Diluted (in dollars per share)	$ 4.97	$ 6.92	$ 2.54
Weighted-average common shares outstanding:
Basic (in shares)	209,940	209,063	208,928
Diluted (in shares)	215,821	212,126	209,869
Restructuring, Incurred Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Operating and administrative expenses	Operating and administrative expenses