Partnership Distributions (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Distribution Made to Limited Partner
Partnership distributions to partners (days following quarter end)	45 days
Pre-Incentive distribution of the available cash to Limited Partners	98.00%
Pre-Incentive distribution of available cash to General Partners	2.00%
General Partner Interest in AmeriGas partners	1.00%
General Partner Interest in AmeriGas OLP	1.01%
First target distribution	$ 0.055
Threshold for increased distribution to General Partner	$ 0.605
General Partners distribution based on ownership interest	$ 39.3	$ 32.4	$ 27.4
Incentive distributions received by the General Partner	$ 30.4	$ 23.9	$ 19.3
Minimum
Distribution Made to Limited Partner
Quarterly distribution	$ 0.55
Available cash for per common unit	$ 0.605	$ 0.605	$ 0.605