Employee Retirement Plans Textual (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial losses for Fiscal 2013	$ (6,800)
Amortization of net prior service credits for Fiscal 2013	(300)
Projected benefit obligations of unfunded and non qualified supplemental executive retirement plans	3,550	2,507
Net cost to sponsor unfunded and non-qualified supplemental executive retirement plans	498	255	583
The aggregate holdings of all qualifying employer securities not to exceed the fair value of trust assets at the time of purchase	10.00%
Percentage of UGI Common Stock represented Pension Plan Assets	8.20%	7.50%
Cost of benefits under the 401(k) savings plan	1,762	1,690	1,820
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
ABO for the Pension Plans	451,228	496,395
Benefit obligations	486,468	543,605	456,714
Expected contribution to pensions plans in next twelve months	(17,900)
Pension Benefits [Member] | Employees of UGI and Certain of its Other Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	44,161	48,570
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	10,688	14,560	13,333
Other Postretirement Benefits [Member] | Employees of UGI and Certain of its Other Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
ABO for the Pension Plans	$ 787	$ 869
Fiscal 2017 [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed domestic health care cost range	7.00%
Fiscal 2017 [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed domestic health care cost range	5.00%
Fiscal 2019 [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed domestic health care cost range	7.50%
Fiscal 2019 [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed domestic health care cost range	5.00%