Long-term Borrowings (Details)	12 Months Ended								12 Months Ended	1 Months Ended	12 Months Ended							0 Months Ended				12 Months Ended		12 Months Ended			12 Months Ended				12 Months Ended			12 Months Ended					12 Months Ended				1 Months Ended	12 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2014 AmeriGas Propane USD ($)	Sep. 30, 2013 AmeriGas Propane USD ($)	Sep. 30, 2014 AmeriGas Propane Senior Notes USD ($)	Sep. 30, 2013 AmeriGas Propane Senior Notes USD ($)	Jan. 12, 2012 AmeriGas Propane Senior Notes USD ($)	Sep. 30, 2014 AmeriGas Propane Senior Notes Maximum	Jun. 30, 2012 AmeriGas Propane Senior Notes 7.00% Senior Notes, due 2022 USD ($)	Sep. 30, 2012 AmeriGas Propane Senior Notes 7.00% Senior Notes, due 2022 USD ($)	Sep. 30, 2014 AmeriGas Propane Senior Notes 7.00% Senior Notes, due 2022 USD ($)	Sep. 30, 2013 AmeriGas Propane Senior Notes 7.00% Senior Notes, due 2022 USD ($)	Jan. 12, 2012 AmeriGas Propane Senior Notes 7.00% Senior Notes, due 2022 USD ($)	Sep. 30, 2014 AmeriGas Propane Senior Notes 6.75% Senior Notes, due 2020 USD ($)	Sep. 30, 2013 AmeriGas Propane Senior Notes 6.75% Senior Notes, due 2020 USD ($)	Jan. 12, 2012 AmeriGas Propane Senior Notes 6.75% Senior Notes, due 2020	Mar. 28, 2012 AmeriGas Propane Senior Notes 6.50% Senior Notes, due 2021	Sep. 30, 2014 AmeriGas Propane Senior Notes 6.50% Senior Notes, due 2021 USD ($)	Sep. 30, 2013 AmeriGas Propane Senior Notes 6.50% Senior Notes, due 2021 USD ($)	Mar. 28, 2012 AmeriGas Propane Senior Notes 6.50% Senior Notes, due 2021 USD ($)	Sep. 30, 2014 AmeriGas Propane Senior Secured Notes HOLP Senior Secured Notes USD ($)	Sep. 30, 2013 AmeriGas Propane Senior Secured Notes HOLP Senior Secured Notes USD ($)	Sep. 30, 2014 Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 USD ($)	Sep. 30, 2014 Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 EUR (€)	Sep. 30, 2013 Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 USD ($)	Sep. 30, 2014 Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 Minimum	Sep. 30, 2014 Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 Maximum	Sep. 30, 2013 Flaga Notes Payable to Banks Flaga Term Loan, due September 2016 USD ($)	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due September 2016 USD ($)	Sep. 30, 2013 Flaga Notes Payable to Banks Flaga Term Loan, due October 2016 USD ($)	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due October 2016 USD ($)	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due October 2016 EUR (€)	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due October 2016 Minimum	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due October 2016 Maximum	Sep. 30, 2013 Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 USD ($)	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 USD ($)	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 EUR (€)	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 Minimum	Sep. 30, 2014 Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 Maximum	Sep. 30, 2014 UGI Utilities USD ($)	Sep. 30, 2013 UGI Utilities USD ($)	Mar. 31, 2014 UGI Utilities Senior Notes 4.98% Senior Notes due 2044 USD ($)	Sep. 30, 2014 UGI Utilities Senior Notes 4.98% Senior Notes due 2044 USD ($)	Mar. 31, 2016 Forecast Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 USD ($)	Mar. 31, 2016 Forecast Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 EUR (€)	May 31, 2015 Forecast Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 USD ($)	May 31, 2015 Forecast Antargaz Notes Payable to Banks Antargaz Senior Facilities Term Loan, due 2016 EUR (€)	Sep. 30, 2016 Forecast Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 USD ($)	Sep. 30, 2016 Forecast Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 EUR (€)	Aug. 31, 2016 Forecast Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 USD ($)	Aug. 31, 2016 Forecast Flaga Notes Payable to Banks Flaga Term Loan, due through September 2016 EUR (€)
Debt Instrument
Long-term Debt	$ 3,510,800,000	$ 3,609,400,000		$ 2,291,700,000	$ 2,300,100,000	$ 450,000,000	$ 450,000,000					$ 980,800,000	$ 980,800,000		$ 550,000,000	$ 550,000,000			$ 270,000,000	$ 270,000,000		$ 26,500,000	$ 32,000,000	$ 432,000,000	€ 342,000,000	$ 514,000,000			$ 52,000,000	$ 52,000,000	$ 25,800,000	$ 24,100,000	€ 19,100,000			$ 54,100,000	$ 50,500,000	€ 40,000,000			$ 642,000,000	$ 642,000,000	$ 175,000,000						$ 16,800,000	€ 13,300,000	$ 33,700,000	€ 26,700,000
Principal repayments due in 2015	76,700,000																																														43,200,000	34,200,000
Principal repayments due in 2016	748,200,000																																												388,800,000	307,800,000
Aggregate principal amount								550,000,000						1,000,000,000
Interest rate stated percentage						6.25%				7.00%		7.00%		7.00%	6.75%		6.75%		6.50%		6.50%																						4.98%
Percentage of Redemption at Option									35.00%
Guaranteed Debt						1,500,000,000
Debt Tendered for Redemption																					383,500,000
Percentage of Aggregate Amount Outstanding Tendered																		82.00%
Principal Amount Outstanding Before Redemption																					470,000,000
Redemption Value of Senior Notes																					200,000,000
Early Redemption Percentage of Senior Notes																		105.00%
Percentage of Proration Factor																		52.30%
Repayments of Long-term Debt	242,600,000	168,700,000	299,900,000							19,200,000.0
Loss on extinguishments of debt	0	0	13,300,000								13,300,000
Reduction in Net Income Attributable to Company											2,200,000
Debt Instrument, Unamortized Premium																						3,100,000
Margin on Term Loan Base Rate Borrowings																													1.25%					117.50%	252.50%				1.125%	2.55%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum																						7.89%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum																						8.87%
Debt Instrument, Interest Rate, Effective Percentage																						6.75%		4.79%	4.79%	4.41%			1.82%	1.82%	3.85%	3.40%	3.40%			4.68%	4.25%	4.25%
Margin on Credit Agreement Base Rate Borrowings																											1.75%	2.50%
Effective EURIBOR Rate of Interest on Term Loan																								2.45%	2.45%						1.79%					2.68%
Effective EURIBOR Rate of Interest on Term Loan Thereafter																								3.71%	3.71%
Ratio of Net Debt to EBITDA																								3.50	3.50
Guarantor Obligations, Maximum Exposure, Undiscounted																									100,000,000
Debt Instrument, Term																																											364 days
Ratio of Consolidated Debt to Consolidated Capital																																												0.65
Amount of Net Assets Restricted from Transfer to Parent Company under Different Agreements																																												$ 1,600,000,000