Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2010
Valuation and Qualifying Accounts [Abstract]
Insurance Indemnification Receivables	$ 6,291		$ 8,163		$ 882
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	6,368		7,072		11,384
Charged to costs and expenses	6,286		9,137		10,651
Other	(9,066)	[1]	(9,841)	[1]	(14,963)	[1]
Ending Balance	3,588		6,368		7,072
Property and Casualty Liability [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	34,080	[2]	33,465	[2]	38,707
Charged to costs and expenses	1,614		10,173		(1,547)
Valuation allowances and reserves, deductions on other adjustment	(8,359)	[3]	(9,558)	[3]	(2,940)	[3]
Other Adjustments	384	[4]			755	[4]
Ending Balance	$ 26,951	[2]	$ 34,080	[2]	$ 33,465	[2]

[1] Uncollectible accounts written off, net of recoveries

[2] At September 30, 2012, 2011 and 2010, UGI Utilities had insurance indemnification receivables associated with its property and casualty liabilities totaling $6,291, $8,163 and $882, respectively.

[3] Payments, net

[4] Other adjustments