Segment Information Segment Information - Reconciliation of Partnership Adjusted EBITDA (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014
Segment Reporting Information
Depreciation and amortization	$ 88.0		$ 87.7		$ 179.0		$ 181.7
Operating income	702.1		588.6		785.4		952.3
General Partnership interest in AmeriGas OLP (percentage)	1.01%		1.01%
Amerigas Propane
Segment Reporting Information
Partnership Adjusted EBITDA	342.1	[1]	331.2	[1]	530.6	[1]	561.5	[1]
Depreciation and amortization	48.1		49.2		97.5		101.5
Noncontrolling interests	2.9	[2]	2.8	[2]	3.5	[2]	4.5	[2]
Operating income	$ 296.9		$ 284.8		$ 436.6		$ 464.5

[1] The following table provides a reconciliation of Partnership Adjusted EBITDA to AmeriGas Propane operating income: Three Months EndedMarch 31, Six Months Ended March 31, 2015 2014 2015 2014Partnership Adjusted EBITDA $342.1 $331.2 $530.6 $561.5Depreciation and amortization (48.1) (49.2) (97.5) (101.5)Noncontrolling interests (i) 2.9 2.8 3.5 4.5Operating income $296.9 $284.8 $436.6 $464.5(i)Principally represents the General Partner’s 1.01% interest in AmeriGas OLP.

[2] Principally represents the General Partner’s 1.01% interest in AmeriGas OLP.