Acquisition of Totalgaz - Schedule of Preliminary Purchase Price Allocation (Details) - USD ($) $ in Millions		May. 29, 2015	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014
Liabilities assumed:
Goodwill (not subject to amortization)			$ 2,927.7	$ 2,833.4	$ 2,885.1
UGI France | Totalgaz
Assets acquired:
Cash		$ 86.8
Accounts receivable	[1]	170.3
Prepaid expenses and other current assets		11.7
Property, plant and equipment		375.3
Intangible assets	[2]	98.0
Other assets		30.9
Total assets acquired		773.0
Liabilities assumed:
Accounts payable		109.2
Other current liabilities		103.4
Deferred income taxes		120.3
Other noncurrent liabilities		109.4
Total liabilities assumed		442.3
Goodwill (not subject to amortization)		167.1
Net consideration transferred		497.8
UGI France | Totalgaz | Trade Names
Liabilities assumed:
Indefinite-lived intangible assets acquired	[2]	12.0
UGI France | Totalgaz | Customer Relationships
Liabilities assumed:
Finite-lived intangibles assets acquired	[2]	$ 86.0
Weighted average amortization period		15 years

[1] Approximates the gross contractual amounts of receivables acquired.

[2] Represents $86.0 of customer relationships and $12.0 of tradenames, which have preliminary average amortization periods of approximately 15 years.