Inventories - Narrative (Details) - UGI Utilities	9 Months Ended
Jun. 30, 2020 storage_agreement
Inventory
Number of storage agreements	3
SCAA contract term (up to)	3 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_PublicUtilitiesInventoryLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration