Inventories - Narrative (Details) - UGI Utilities $ in Millions	3 Months Ended
	Dec. 31, 2019 storage_agreement	Dec. 31, 2018 USD ($) Bcf
Inventory
Number of storage agreements | storage_agreement	3
SCAA contract term (up to)	3 years
Volume of gas storage inventories released under SCAAs with non-affiliates (in bcf) | Bcf		1.9
Carrying value of gas storage inventories released under SCAAs with non-affiliates | $		$ 4.6