Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended					12 Months Ended		12 Months Ended									12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2013 Accrued Interest Included [Member]	Sep. 30, 2012 Foreign Country [Member]	Sep. 30, 2013 Foreign Country [Member]	Sep. 30, 2013 State and Local Jurisdiction [Member]	Sep. 30, 2012 State and Local Jurisdiction [Member]	Sep. 30, 2011 State and Local Jurisdiction [Member]	Sep. 30, 2013 Domestic Tax Authority [Member]	Sep. 30, 2013 Flaga [Member]	Sep. 30, 2013 Flaga [Member] Foreign Country [Member]	Sep. 30, 2013 Antargaz [Member]	Sep. 30, 2013 Antargaz [Member] Foreign Country [Member]	Sep. 30, 2013 UGI International Holdings [Member]	Sep. 30, 2013 AmeriGas Propane [Member]	Sep. 30, 2013 Other Subsidiaries [Member]	Sep. 30, 2013 UGI International [Member]
Income Taxes [Line Items]
Decrease in unusable foreign tax credits	$ 34.9	$ 5.2
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance						4.6
State Net Operating Loss carryforwards								224.9					47.7		5.3		15.7
Income Tax Expense (Benefit), Accelerated Depreciation								(1.5)	(3.2)	(7.9)
Deferred tax assets relating to operating loss carryforwards	32.1	33.4										11.0		1.8		0.9	6.1	17.6
Valuation allowance provided for deferred tax assets related to state net operating loss carryforwards and other state deferred tax assets of certain subsidiaries	13.5
Valuation allowance operating loss carryforwards related to acquisition																			7.9
Deferred tax assets and associated valuation allowance for unrealized state tax benefits for equity compensation deductions		4.6						5.6
Foreign tax credit carryforwards							81.8
Increase (decrease) in valuation allowance	(20.6)																4.7
Foreign Income Tax Expense (Benefit), Unused Foreign Tax Credit	(26.3)
Increase in unusable state operating losses								4.7			1.0
Unrecognized income tax benefits	3.4	2.9	6.3	5.4	3.6
Accrued interest included in unrecognized income tax benefits	0.2
Unrecognized tax benefits if recognized would impact the reported effective tax rate	2.4
Tax positions for which the deductibility is highly certain but uncertainty about the timing	1.1
Expected change in unrecognized tax benefits and related interest	$ 0.7