CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)	Total	Total UGI Corporation stockholders’ equity	Preferred stock, without par value	Preferred stock, without par value Cumulative effect of change in accounting - ASU 2020-06	Common stock, without par value	Common stock, without par value Cumulative effect of change in accounting - ASU 2020-06	Retained earnings	Retained earnings Cumulative effect of change in accounting - ASU 2020-06	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests
Balance, beginning of year at Sep. 30, 2021			$ 213,000,000		$ 1,394,000,000		$ 4,081,000,000		$ (140,000,000)	$ (26,000,000)	$ 9,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock issued in connection with employee and director plans, net of tax withheld					19,000,000
Equity-based compensation expense					17,000,000
Net income (loss) attributable to UGI Corporation	$ 1,073,000,000						1,073,000,000
Cash dividends on common stock ($1.50, $1.47, and $1.41 per share, respectively)							(296,000,000)
Losses on treasury stock transactions in connection with employee and director plans							(17,000,000)
Net (losses) gains on derivative instruments	64,000,000								64,000,000
Reclassification of net (gains) losses on derivative instruments	6,000,000								6,000,000
Benefit plans, principally actuarial (losses) gains	28,000,000								28,000,000
Reclassification of benefit plans net actuarial (gains) losses and net prior service costs (benefits)	3,000,000								3,000,000
Foreign currency gains (losses) on long-term intra-company transactions	(148,000,000)								(148,000,000)
Foreign currency translation adjustments	(193,000,000)								(193,000,000)
Common Stock issued in connection with employee and director plans, net of tax withheld										34,000,000
Repurchases of common stock	0									(38,000,000)
Reacquired common stock – employee and director plans										(10,000,000)
Noncontrolling interests’ net income	1,074,000,000										1,000,000
Other			(51,000,000)		53,000,000						(2,000,000)
Balance, ending of year at Sep. 30, 2022	6,074,000,000	$ 6,066,000,000	162,000,000	$ 5,000,000	1,483,000,000	$ (6,000,000)	4,841,000,000	$ 1,000,000	(380,000,000)	(40,000,000)	8,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock issued in connection with employee and director plans, net of tax withheld					8,000,000
Equity-based compensation expense					18,000,000
Net income (loss) attributable to UGI Corporation	(1,502,000,000)						(1,502,000,000)
Cash dividends on common stock ($1.50, $1.47, and $1.41 per share, respectively)							(308,000,000)
Losses on treasury stock transactions in connection with employee and director plans							(5,000,000)
Net (losses) gains on derivative instruments	16,000,000								16,000,000
Reclassification of net (gains) losses on derivative instruments	(27,000,000)								(27,000,000)
Benefit plans, principally actuarial (losses) gains	5,000,000								5,000,000
Reclassification of benefit plans net actuarial (gains) losses and net prior service costs (benefits)	(2,000,000)								(2,000,000)
Foreign currency gains (losses) on long-term intra-company transactions	64,000,000								64,000,000
Foreign currency translation adjustments	68,000,000								68,000,000
Common Stock issued in connection with employee and director plans, net of tax withheld										7,000,000
Repurchases of common stock										(22,000,000)
Noncontrolling interests’ net income	(1,502,000,000)
Balance, ending of year at Sep. 30, 2023	4,394,000,000	4,386,000,000	167,000,000		1,503,000,000		3,027,000,000		(256,000,000)	(55,000,000)	8,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation expense					7,000,000
Net income (loss) attributable to UGI Corporation	269,000,000						269,000,000
Cash dividends on common stock ($1.50, $1.47, and $1.41 per share, respectively)							(318,000,000)
Net (losses) gains on derivative instruments	(14,000,000)								(14,000,000)
Reclassification of net (gains) losses on derivative instruments	(35,000,000)								(35,000,000)
Benefit plans, principally actuarial (losses) gains	(7,000,000)								(7,000,000)
Reclassification of benefit plans net actuarial (gains) losses and net prior service costs (benefits)	0
Foreign currency gains (losses) on long-term intra-company transactions	47,000,000								12,000,000
Foreign currency translation adjustments	12,000,000								47,000,000
Reacquired common stock – employee and director plans										(1,000,000)
Noncontrolling interests’ net income	269,000,000
Settlement of Equity Units			$ (167,000,000)		166,000,000
Other											1,000,000
Balance, ending of year at Sep. 30, 2024	$ 4,354,000,000	$ 4,345,000,000			$ 1,676,000,000		$ 2,978,000,000		$ (253,000,000)	$ (56,000,000)	$ 9,000,000