XML 69 R60.htm IDEA: XBRL DOCUMENT
v3.19.1

Accounting Changes Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Accounting Changes and Error Corrections [Abstract] |  |  |
Pension expense from non-secruve cost component net of amount capitalized | $ 0.6 | $ 5.8 | $ 4.4

X
- Definition Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component + References No definition available. + Details
Name: | ugi_NetPeriodicDefinedBenefitsExpenseReversalofExpenseExcludingServiceCostComponent
Namespace Prefix: | ugi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingChangesAndErrorCorrectionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration