Segment Information - Reconciliation of Partnership Adjusted EBITDA (Details) - USD ($) $ in Millions		3 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information
Depreciation and amortization		$ (98.1)	$ (100.6)	[1]
Interest expense		(55.4)	(57.9)	[1]
Loss on extinguishment of debt		(33.2)	0.0
Income before income taxes		$ 378.7	$ 247.5	[1]
General Partnership interest in AmeriGas OLP (percentage)		1.01%	1.01%
Operating Segments | Amerigas Propane
Segment Reporting Information
Partnership Adjusted EBITDA	[2]	$ 185.1	$ 177.7	[1]
Depreciation and amortization		(44.6)	(49.2)	[1]
Interest expense		(40.0)	(41.0)	[1]
Loss on extinguishment of debt		(33.2)	0.0
Noncontrolling interest	[3]	1.4	1.1
Income before income taxes		$ 68.7	$ 88.6	[1]

[1] Restated to reflect (1) the current-year changes in the presentation of our UGI International and Midstream & Marketing reportable segments and (2) the adoption of new accounting guidance related to debt issuance costs (see Note 2).

[2] The following table provides a reconciliation of Partnership Adjusted EBITDA to AmeriGas Propane income before income taxes: Three Months EndedDecember 31, 2016 2015Partnership Adjusted EBITDA $185.1 $177.7Depreciation and amortization (44.6) (49.2)Interest expense (40.0) (41.0)Loss on extinguishment of debt (33.2) —Noncontrolling interest (i) 1.4 1.1Income before income taxes $68.7 $88.6(i)Principally represents the General Partner’s 1.01% interest in AmeriGas OLP.

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