Short-term Borrowings (Details)								12 Months Ended	0 Months Ended							12 Months Ended		12 Months Ended		12 Months Ended								12 Months Ended			1 Months Ended			12 Months Ended		1 Months Ended				12 Months Ended				5 Months Ended	7 Months Ended
	Sep. 30, 2014 Line of Credit Flaga USD ($)	Sep. 30, 2014 Line of Credit Flaga EUR (€)	Sep. 30, 2013 Line of Credit Flaga USD ($)	Sep. 30, 2013 Line of Credit Flaga EUR (€)	Sep. 30, 2014 Line of Credit AmeriGas Credit Agreement AmeriGas Propane USD ($)	Jun. 30, 2014 Line of Credit AmeriGas Credit Agreement AmeriGas Propane USD ($)	Sep. 30, 2013 Line of Credit AmeriGas Credit Agreement AmeriGas Propane USD ($)	Sep. 30, 2014 Line of Credit Senior Facilities Agreement Credit Facility Antargaz EUR (€)	Sep. 30, 2014 Line of Credit Flaga Credit Agreements Flaga credit_agreement	Sep. 30, 2014 Line of Credit Flaga Credit Agreements Flaga USD ($)	Sep. 30, 2014 Line of Credit Flaga Credit Agreements Flaga EUR (€)	Sep. 30, 2013 Line of Credit Flaga Credit Agreements Flaga USD ($)	Sep. 30, 2013 Line of Credit Flaga Credit Agreements Flaga EUR (€)	Sep. 30, 2014 Line of Credit Multi-Currency Working Capital Facility Flaga USD ($)	Sep. 30, 2014 Line of Credit Euro Working Capital Facility Flaga USD ($)	Sep. 30, 2014 Line of Credit UGI Utilities Credit Agreement UGI Utilities USD ($)	Sep. 30, 2013 Line of Credit UGI Utilities Credit Agreement UGI Utilities USD ($)	Sep. 30, 2014 Line of Credit Energy Services Credit Agreement Energy Services USD ($)	Sep. 30, 2013 Line of Credit Energy Services Credit Agreement Energy Services USD ($)	Sep. 30, 2014 Line of Credit Energy Services Credit Agreement Energy Services Federal Funds Rate	Sep. 30, 2014 Line of Credit Energy Services Credit Agreement Energy Services London Interbank Offered Rate (LIBOR)	Sep. 30, 2014 Line of Credit Energy Services Credit Agreement Energy Services Alternate Base Rate	Sep. 30, 2014 Line of Credit Energy Services Credit Agreement Energy Services One -Month LIBOR Rate	Jun. 30, 2014 Letter of Credit AmeriGas Credit Agreement AmeriGas Propane USD ($)	Sep. 30, 2014 Letter of Credit UGI Utilities Credit Agreement UGI Utilities USD ($)	Sep. 30, 2014 Letter of Credit Energy Services Credit Agreement Energy Services USD ($)	Sep. 30, 2014 Overdraft Facility Multi-Currency Working Capital Facility Flaga USD ($)	Sep. 30, 2014 Receivables Facility Energy Services Accounts Receivable Securitization Facility Energy Services USD ($)	Sep. 30, 2013 Receivables Facility Energy Services Accounts Receivable Securitization Facility Energy Services USD ($)	Sep. 30, 2012 Receivables Facility Energy Services Accounts Receivable Securitization Facility Energy Services USD ($)	Jun. 30, 2014 Minimum AmeriGas Credit Agreement AmeriGas Propane	Jun. 30, 2014 Minimum AmeriGas Credit Agreement AmeriGas Propane Base Rate	Jun. 30, 2014 Minimum AmeriGas Credit Agreement AmeriGas Propane Eurodollar	Sep. 30, 2014 Minimum Line of Credit Senior Facilities Agreement Credit Facility Antargaz	Sep. 30, 2014 Minimum Line of Credit UGI Utilities Credit Agreement UGI Utilities	Jun. 30, 2014 Maximum AmeriGas Credit Agreement AmeriGas Propane	Jun. 30, 2014 Maximum AmeriGas Credit Agreement AmeriGas Propane Federal Funds Rate	Jun. 30, 2014 Maximum AmeriGas Credit Agreement AmeriGas Propane Base Rate	Jun. 30, 2014 Maximum AmeriGas Credit Agreement AmeriGas Propane Eurodollar	Sep. 30, 2014 Maximum Line of Credit Senior Facilities Agreement Credit Facility Antargaz	Sep. 30, 2014 Maximum Line of Credit UGI Utilities Credit Agreement UGI Utilities	Sep. 30, 2014 Maximum Line of Credit Energy Services Credit Agreement Energy Services	Sep. 30, 2014 Energy Services Credit Agreement	Oct. 31, 2015 Subsequent Event Receivables Facility Energy Services Accounts Receivable Securitization Facility Energy Services USD ($)	May 31, 2015 Subsequent Event Receivables Facility Energy Services Accounts Receivable Securitization Facility Energy Services USD ($)
Short-term Debt
Line of Credit Facility, Interest Rate at Period End																																											0.00%
Line of Credit Facility, Maximum Borrowing Capacity						$ 525		€ 40,000,000						$ 46,000,000	$ 0	$ 300		$ 240						$ 125	$ 100	$ 50	$ 6,000,000
Debt Instrument, Basis Spread on Variable Rate																				0.50%	2.50%	1.50%	1.00%									0.50%	1.50%	1.75%	0.00%		0.50%	1.50%	2.50%	2.50%	2.00%
Line of Credit Facility, Commitment Fee Percentage																															0.30%					0.45%
Short-term Debt, Weighted Average Interest Rate					2.16%		2.69%					4.21%	4.21%			1.03%	1.18%		2.91%
Letters of Credit Outstanding, Amount					64,700,000		53,700,000			40,800,000	32,300,000	38,700,000	28,600,000			2,000,000	2,000,000
Line of Credit Facility, Number of Credit Agreements									2
Line of Credit Facility, Amount Outstanding at Period End	8,000,000	6,300,000	6,200,000	4,600,000				0			0	300,000	200,000					0	57,000,000
Ratio of Net Debt to EBITDA								3.50
Ratio of Consolidated Debt to Consolidated Capital																0.65
Ratio of Consolidated Indebtedness to EBITDA																																										2.25
Debt Instrument, Restrictive Covenant, Maximum Consolidated Total Indebtedness Ceiling																		250
Debt Instrument, Restrictive Covenant, Minimum Consolidated Net Worth Floor																		200
Receivables Facility, Maximum Borrowing Capacity																																												75,000,000	150,000,000
Sale of Trade Receivables to Consolidated Special Purpose Subsidiary																												1,260,600,000	975,300,000	836,000,000
Proceeds from Accounts Receivable Securitization																												354,000,000	291,000,000	286,000,000
Outstanding Balance of ESFC Trade Receivables																												46,400,000	55,000,000
Trade Receivables Sold to Commercial Paper Conduit																												7,500,000	30,000,000
Losses on Sales of Receivables to Commercial Paper Conduit Included in Interest Expenses																												$ 600,000	$ 700,000	$ 1,000,000