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		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues	$ 1,486.7	$ 1,374.3	$ 6,965.9	$ 5,935.7
Cost of sales	926.5	836.8	4,357.7	3,539.0
Operating and administrative expenses	415.9	407.5	1,339.4	1,295.9
Depreciation	74.6	76.4	230.0	222.9
Other income, net	(12.1)	(7.0)	(30.6)	(24.5)
Operating income	62.7	41.5	1,015.0	843.4
Interest expense	(60.1)	(59.2)	(178.9)	(180.8)
Income (loss) before income taxes	2.5	(17.7)	836.0	662.7
Income taxes	(15.2)	(5.1)	(243.4)	(176.0)
Net (loss) income	(12.7)	(22.8)	592.6	486.7
Add net loss (deduct net income) attributable to noncontrolling interests, principally in AmeriGas Partners	33.3	31.9	(235.6)	(194.4)
Net income attributable to UGI Corporation	20.6	9.1	357.0	292.3
Basic earnings per common share	$ 0.18	$ 0.08	$ 3.10	$ 2.57
Diluted earnings per common share	$ 0.18	$ 0.08	$ 3.06	$ 2.54
As Previously Reported
Revenues		1,372.3		5,932.6
Cost of sales		827.9		3,547.3
Operating and administrative expenses		404.7		1,297.4
Depreciation		76.5		220.0
Other income, net		(9.0)		(26.5)
Operating income		53.1		835.4
Interest expense		(59.2)		(179.6)
Income (loss) before income taxes		(6.1)		655.9
Income taxes		(9.0)		(174.1)
Net (loss) income		(15.1)		481.8
Add net loss (deduct net income) attributable to noncontrolling interests, principally in AmeriGas Partners		29.8		(192.6)
Net income attributable to UGI Corporation		14.7		289.2
Basic earnings per common share		$ 0.13		$ 2.54
Diluted earnings per common share		$ 0.13		$ 2.51
Adjustment
Revenues		2.0		3.1
Cost of sales		8.9		(8.3)
Operating and administrative expenses		2.8		(1.5)
Depreciation		(0.1)		2.9
Other income, net		2.0		2.0
Operating income		(11.6)		8.0
Interest expense		0		(1.2)
Income (loss) before income taxes		(11.6)		6.8
Income taxes		3.9		(1.9)
Net (loss) income		(7.7)		4.9
Add net loss (deduct net income) attributable to noncontrolling interests, principally in AmeriGas Partners		2.1		(1.8)
Net income attributable to UGI Corporation		$ (5.6)		$ 3.1