Significant Accounting Policies (Details Textuals) (USD $) In Millions	9 Months Ended
Jun. 30, 2011
Significant Accounting Policies (Textuals) [Abstract]
Other comprehensive income including associated after-tax charge	$ 2.1

Name:

ugi_PensionRemeasurementAfterTaxComprehensiveIncomeIncrease

Namespace Prefix:

ugi

Data Type:

xbrli:monetaryItemType

Balance Type:

na

Period Type:

duration