Commitments and Contingencies (Details)	3 Months Ended	6 Months Ended
	Dec. 31, 2015 USD ($) lb	Oct. 31, 2014 lawsuit	Dec. 31, 2014 USD ($)
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	$ 11,700,000		$ 11,200,000