Condensed Financial Information of Registrant (Parent Company) (Details 1) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 1,259.0	$ 1,374.3	$ 2,542.7	$ 2,018.7	$ 1,126.0	$ 1,280.7	$ 2,427.8	$ 1,686.8	$ 7,194.7		$ 6,521.3		$ 6,090.9
Costs and Expenses
Operating and administrative expenses	396.1	407.5	461.5	426.9	400.1	404.5	443.8	342.7	1,692.0		1,591.1		1,267.0
Other income, net	(8.3)	(7.0)	(7.5)	(10.0)	(10.8)	(8.1)	(12.8)	(8.1)	(32.8)		(39.8)		(45.5)
Total costs and expenses	1,271.3	1,332.8	2,035.0	1,724.5	1,141.0	1,277.5	2,042.8	1,521.4	6,363.6		5,982.7		5,448.5
Operating (loss) income	(12.3)	41.5	507.7	294.2	(15.0)	3.2	385.0	165.4	831.1		538.6		642.4
Income tax expense (benefit)	(13.2)	5.1	106.0	64.9	(7.7)	4.1	77.2	33.3	162.8		106.9		145.4
Equity in income of unconsolidated subsidiaries	(0.5)		0.1		(0.1)	(0.1)		(0.1)	(0.4)		(0.3)		(0.9)
Net income attributable to UGI Corporation	(14.2)	9.1	180.7	102.5	(6.3)	5.3	136.3	74.9	278.1		210.2		245.4
Earnings per common share:
Basic (in dollars per share)	$ (0.12)	$ 0.08	$ 1.59	$ 0.91	$ (0.06)	$ 0.05	$ 1.21	$ 0.67	$ 2.44		$ 1.87		$ 2.20
Diluted (in dollars per share)	$ (0.12)	$ 0.08	$ 1.57	$ 0.90	$ (0.06)	$ 0.05	$ 1.20	$ 0.66	$ 2.41		$ 1.85		$ 2.17
Average common shares outstanding (thousands):
Basic (in shares)	114,598	114,240	113,709	113,136	112,868	112,726	112,510	112,240	113,923	[1]	112,581	[1]	111,674
Diluted (in shares)	114,598	116,196	115,199	114,490	112,868	113,504	113,239	113,152	115,521	[1]	113,432	[1]	112,944
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues									0		0		0
Costs and Expenses
Operating and administrative expenses									36.9		27.8		31.0
Other income, net									(36.7)	[2]	(28.1)	[2]	(24.8)	[2]
Total costs and expenses									0.2		(0.3)		6.2
Operating (loss) income									(0.2)		0.3		(6.2)
Intercompany interest income									0.2		0.2		0.1
Income (loss) before income taxes									0		0.5		(6.1)
Income tax expense (benefit)									3.1		0.3		(1.1)
(Loss) income before equity in income of unconsolidated subsidiaries									(3.1)		0.2		(5.0)
Equity in income of unconsolidated subsidiaries									281.2		210.0		250.4
Net income attributable to UGI Corporation									$ 278.1		$ 210.2		$ 245.4
Earnings per common share:
Basic (in dollars per share)									$ 2.44		$ 1.87		$ 2.20
Diluted (in dollars per share)									$ 2.41		$ 1.85		$ 2.17
Average common shares outstanding (thousands):
Basic (in shares)									113,923		112,581		111,674
Diluted (in shares)									115,521		113,432		112,944

[1] For Fiscal 2013, Fiscal 2012 and Fiscal 2011, there were approximately 88 shares, 81 shares and 3,700 shares, respectively, associated with outstanding stock option awards that were not included in the computation of diluted earnings per share above because their effect was antidilutive.

[2] UGI provides certain financial and administrative services to certain of its subsidiaries. UGI bills these subsidiaries monthly for all direct expenses incurred by UGI on behalf of its subsidiaries as well as allocated shares of indirect corporate expense incurred or paid with respect to services provided by UGI. The allocation of indirect UGI corporate expenses to certain of its subsidiaries utilizes a weighted, three-component formula comprising revenues, operating expenses, and net assets employed and considers the relative percentage of such items for each subsidiary to the total of such items for all UGI operating subsidiaries for which general and administrative services are provided. Management believes that this allocation method is reasonable and equitable to its subsidiaries. These billed expenses are classified as “Other income, net” in the Statements of Income above.