Long-term Borrowings - Schedule of Long-term Debt Instruments (Details) In Millions, unless otherwise specified	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 AmeriGas Propane USD ($)	Sep. 30, 2013 AmeriGas Propane USD ($)	Sep. 30, 2014 AmeriGas Propane Other USD ($)	Sep. 30, 2013 AmeriGas Propane Other USD ($)	Sep. 30, 2014 UGI International USD ($)	Sep. 30, 2013 UGI International USD ($)	Sep. 30, 2014 UGI Utilities USD ($)	Sep. 30, 2013 UGI Utilities USD ($)	Sep. 30, 2014 Other USD ($)	Sep. 30, 2013 Other USD ($)	Sep. 30, 2014 Senior Notes AmeriGas Propane USD ($)	Sep. 30, 2013 Senior Notes AmeriGas Propane USD ($)	Sep. 30, 2014 Senior Notes AmeriGas Propane 7.00% Senior Notes, due 2022 USD ($)	Sep. 30, 2013 Senior Notes AmeriGas Propane 7.00% Senior Notes, due 2022 USD ($)	Jun. 30, 2012 Senior Notes AmeriGas Propane 7.00% Senior Notes, due 2022	Jan. 12, 2012 Senior Notes AmeriGas Propane 7.00% Senior Notes, due 2022	Sep. 30, 2014 Senior Notes AmeriGas Propane 6.75% Senior Notes, due 2020 USD ($)	Sep. 30, 2013 Senior Notes AmeriGas Propane 6.75% Senior Notes, due 2020 USD ($)	Jan. 12, 2012 Senior Notes AmeriGas Propane 6.75% Senior Notes, due 2020	Sep. 30, 2014 Senior Notes AmeriGas Propane 6.50% Senior Notes, due 2021 USD ($)	Sep. 30, 2013 Senior Notes AmeriGas Propane 6.50% Senior Notes, due 2021 USD ($)	Mar. 28, 2012 Senior Notes AmeriGas Propane 6.50% Senior Notes, due 2021	Sep. 30, 2014 Senior Notes UGI Utilities 5.75% Senior Notes, due 2016 USD ($)	Sep. 30, 2013 Senior Notes UGI Utilities 5.75% Senior Notes, due 2016 USD ($)	Sep. 30, 2014 Senior Notes UGI Utilities 4.98% Senior Notes, due 2044 USD ($)	Sep. 30, 2013 Senior Notes UGI Utilities 4.98% Senior Notes, due 2044 USD ($)	Sep. 30, 2014 Senior Notes UGI Utilities 6.21% Senior Notes, due 2036 USD ($)	Sep. 30, 2013 Senior Notes UGI Utilities 6.21% Senior Notes, due 2036 USD ($)	Sep. 30, 2014 Senior Secured Notes AmeriGas Propane HOLP Senior Secured Notes USD ($)	Sep. 30, 2013 Senior Secured Notes AmeriGas Propane HOLP Senior Secured Notes USD ($)	Sep. 30, 2014 Medium-term Notes UGI Utilities 5.16% Medium-term Notes, due May 2015 USD ($)	Sep. 30, 2013 Medium-term Notes UGI Utilities 5.16% Medium-term Notes, due May 2015 USD ($)	Sep. 30, 2014 Medium-term Notes UGI Utilities 7.37% Medium-term Notes, due October 2015 USD ($)	Sep. 30, 2013 Medium-term Notes UGI Utilities 7.37% Medium-term Notes, due October 2015 USD ($)	Sep. 30, 2014 Medium-term Notes UGI Utilities 5.64% Medium-term Notes, due December 2015 USD ($)	Sep. 30, 2013 Medium-term Notes UGI Utilities 5.64% Medium-term Notes, due December 2015 USD ($)	Sep. 30, 2014 Medium-term Notes UGI Utilities 6.17% Medium-term Notes, due June 2017 USD ($)	Sep. 30, 2013 Medium-term Notes UGI Utilities 6.17% Medium-term Notes, due June 2017 USD ($)	Sep. 30, 2014 Medium-term Notes UGI Utilities 7.25% Medium-term Notes, due November 2017 USD ($)	Sep. 30, 2013 Medium-term Notes UGI Utilities 7.25% Medium-term Notes, due November 2017 USD ($)	Sep. 30, 2014 Medium-term Notes UGI Utilities 5.67% Medium-term Notes, due 2018 USD ($)	Sep. 30, 2013 Medium-term Notes UGI Utilities 5.67% Medium-term Notes, due 2018 USD ($)	Sep. 30, 2014 Medium-term Notes UGI Utilities 6.50% Medium-term Notes, due 2033 USD ($)	Sep. 30, 2013 Medium-term Notes UGI Utilities 6.50% Medium-term Notes, due 2033 USD ($)	Sep. 30, 2014 Medium-term Notes UGI Utilities 6.13% Medium-term Notes, due 2034 USD ($)	Sep. 30, 2013 Medium-term Notes UGI Utilities 6.13% Medium-term Notes, due 2034 USD ($)	Sep. 30, 2014 Notes Payable to Banks UGI International Other USD ($)	Sep. 30, 2013 Notes Payable to Banks UGI International Other USD ($)	Sep. 30, 2014 Notes Payable to Banks Antargaz Antargaz Senior Facilities Term Loan, due 2016 USD ($)	Sep. 30, 2014 Notes Payable to Banks Antargaz Antargaz Senior Facilities Term Loan, due 2016 EUR (€)	Sep. 30, 2013 Notes Payable to Banks Antargaz Antargaz Senior Facilities Term Loan, due 2016 USD ($)	Sep. 30, 2014 Notes Payable to Banks Flaga Flaga Term Loan, due September 2016 USD ($)	Sep. 30, 2013 Notes Payable to Banks Flaga Flaga Term Loan, due September 2016 USD ($)	Sep. 30, 2014 Notes Payable to Banks Flaga Flaga Term Loan, due through September 2016 USD ($)	Sep. 30, 2014 Notes Payable to Banks Flaga Flaga Term Loan, due through September 2016 EUR (€)	Sep. 30, 2013 Notes Payable to Banks Flaga Flaga Term Loan, due through September 2016 USD ($)	Sep. 30, 2014 Notes Payable to Banks Flaga Flaga Term Loan, due October 2016 USD ($)	Sep. 30, 2014 Notes Payable to Banks Flaga Flaga Term Loan, due October 2016 EUR (€)	Sep. 30, 2013 Notes Payable to Banks Flaga Flaga Term Loan, due October 2016 USD ($)	Sep. 30, 2014 Notes Payable to Banks Flaga Flaga Term Loan, due June 2014 USD ($)	Sep. 30, 2013 Notes Payable to Banks Flaga Flaga Term Loan, due June 2014 USD ($)	Sep. 30, 2014 Notes Payable to Banks UGI Utilities Term Loan Credit Agreement USD ($)	Sep. 30, 2013 Notes Payable to Banks UGI Utilities Term Loan Credit Agreement USD ($)
Debt Instrument
Debt Instrument, Interest Rate, Effective Percentage																															6.75%																				4.79%	4.79%	4.41%	1.82%	1.82%	4.25%	4.25%	4.68%	3.40%	3.40%	3.85%
Total long-term debt	$ 3,510.8	$ 3,609.4	$ 2,291.7	$ 2,300.1	$ 14.4	$ 17.3	$ 565.0	$ 654.4	$ 642.0	$ 642.0	$ 12.1	$ 12.9	$ 450.0	$ 450.0	$ 980.8	$ 980.8			$ 550.0	$ 550.0		$ 270.0	$ 270.0		$ 175.0	$ 175.0	$ 175.0	$ 0	$ 100.0	$ 100.0	$ 26.5	$ 32.0	$ 20.0	$ 20.0	$ 22.0	$ 22.0	$ 50.0	$ 50.0	$ 20.0	$ 20.0	$ 20.0	$ 20.0	$ 20.0	$ 20.0	$ 20.0	$ 20.0	$ 20.0	$ 20.0	$ 6.4	$ 6.6	$ 432.0	€ 342.0	$ 514.0	$ 52.0	$ 52.0	$ 50.5	€ 40.0	$ 54.1	$ 24.1	€ 19.1	$ 25.8	$ 0	$ 1.9	$ 0	$ 175.0
Less: current maturities	(77.2)	(67.2)
Total long-term debt due after one year	$ 3,433.6	$ 3,542.2
Interest rate stated percentage													6.25%		7.00%		7.00%	7.00%	6.75%		6.75%	6.50%		6.50%	5.75%		4.98%		6.21%				5.16%		7.37%		5.64%		6.17%		7.25%		5.67%		6.50%		6.13%