Restatements of Condensed Consolidated Financial Statements - Condensed Consolidated Statement of Income (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Revenues	$ 3,163.3	$ 2,542.7	$ 5,479.2	$ 4,561.4
Cost of sales	2,001.3	1,486.7	3,431.2	2,702.2
Operating and administrative expenses	492.0	461.5	923.5	888.4
Depreciation	76.8	74.0	155.4	146.5
Operating income	588.6	507.7	952.3	801.9
Interest expense	(59.5)	(60.1)	(118.8)	(121.6)
Income before income taxes	529.1	447.7	833.5	680.4
Income taxes	(141.3)	(106.0)	(228.2)	(170.9)
Net income	387.8	341.7	605.3	509.5
Deduct net income attributable to noncontrolling interests	(173.4)	(161.0)	(268.9)	(226.3)
Net income attributable to UGI Corporation	214.4	180.7	336.4	283.2
Basic earnings per common share	$ 1.86	$ 1.59	$ 2.93	$ 2.50
Diluted earnings per common share	$ 1.84	$ 1.57	$ 2.89	$ 2.47
As Previously Reported
Revenues		2,537.1		4,560.3
Cost of sales		1,500.6		2,719.4
Operating and administrative expenses		465.8		892.7
Depreciation		71.7		143.5
Operating income		486.2		782.3
Interest expense		(60.1)		(120.4)
Income before income taxes		426.2		662.0
Income taxes		(100.0)		(165.1)
Net income		326.2		496.9
Deduct net income attributable to noncontrolling interests		(154.3)		(222.4)
Net income attributable to UGI Corporation		171.9		274.5
Basic earnings per common share		$ 1.51		$ 2.42
Diluted earnings per common share		$ 1.49		$ 2.39
Adjustment
Revenues		5.6		1.1
Cost of sales		(13.9)		(17.2)
Operating and administrative expenses		(4.3)		(4.3)
Depreciation		2.3		3.0
Operating income		21.5		19.6
Interest expense		0		(1.2)
Income before income taxes		21.5		18.4
Income taxes		(6.0)		(5.8)
Net income		15.5		12.6
Deduct net income attributable to noncontrolling interests		(6.7)		(3.9)
Net income attributable to UGI Corporation		$ 8.8		$ 8.7