Commitments and Contingencies (Details)	6 Months Ended	9 Months Ended
	Oct. 31, 2014 lawsuit	Jun. 30, 2015 USD ($) lb	Jun. 30, 2014 USD ($)
Commitments and Contingencies
Class action lawsuits (more than 35) | lawsuit	35
Amount of propane in cylinders before reduction | lb		17
Amount of propane in cylinders after reduction | lb		15
PNG MGP
Commitments and Contingencies
Loss contingency, settlement agreement, terms		2 years
Environmental Matters | CPG MGP
Commitments and Contingencies
Environmental expenditures cap during calendar year		$ 1,800,000.0
Environmental Matters | PNG MGP
Commitments and Contingencies
Environmental expenditures cap during calendar year		$ 1,100,000.0
Environmental Matters | UGI Utilities
Commitments and Contingencies
Base year for determination of investigation and remediation cost (in years)		5 years
CPG and PNG COAs | UGI Utilities
Commitments and Contingencies
Accrual for environmental loss contingencies		$ 9,600,000	$ 11,400,000