Debt (International Propane) (Narrative) (Details)	3 Months Ended	12 Months Ended			1 Months Ended		12 Months Ended			12 Months Ended				12 Months Ended										12 Months Ended											12 Months Ended								12 Months Ended
	Mar. 31, 2012	Sep. 30, 2012 USD ($)	Sep. 30, 2012 EUR (€)	Sep. 30, 2013 USD ($)	Mar. 31, 2011 Antargaz 2011 Senior Facilities [Member]	Mar. 31, 2011 Antargaz 2011 Senior Facilities [Member] Variable Rate Term Loan [Member] EUR (€)	Sep. 30, 2012 Antargaz 2011 Senior Facilities [Member] Variable Rate Term Loan [Member]	Sep. 30, 2013 Antargaz 2011 Senior Facilities [Member] Variable Rate Term Loan [Member] USD ($)	Sep. 30, 2013 Antargaz 2011 Senior Facilities [Member] Variable Rate Term Loan [Member] EUR (€)	Sep. 30, 2013 Flaga [Member]	Sep. 30, 2012 Flaga [Member]	Dec. 31, 2011 Flaga [Member] EUR (€)	Sep. 30, 2013 UGI International [Member] EUR (€)	Sep. 30, 2013 UGI International [Member] Euro based variable rate term loan [Member]	Sep. 30, 2012 UGI International [Member] Euro based variable rate term loan [Member]	Mar. 31, 2011 UGI International [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2012 Flaga Predecessor Variable Rate Term Loan [Member] EUR (€)	Sep. 30, 2013 Flaga multi-currency working capital facility [Member] EUR (€) Working_Capital_Facility	Sep. 30, 2013 Flaga 2011 Multi Currency Working Capital Facility [Member] USD ($)	Sep. 30, 2013 Flaga 2011 Multi Currency Working Capital Facility [Member] EUR (€)	Sep. 30, 2012 Flaga 2011 Multi Currency Working Capital Facility [Member] USD ($)	Sep. 30, 2012 Flaga 2011 Multi Currency Working Capital Facility [Member] EUR (€)	Sep. 30, 2013 Flaga euro-denominated working capital facility [Member] EUR (€)	Sep. 30, 2012 Minimum [Member] Antargaz 2011 Senior Facilities [Member]	Sep. 30, 2013 Minimum [Member] Flaga [Member]	Sep. 30, 2013 Minimum [Member] UGI International [Member] Euro based variable rate term loan [Member]	Sep. 30, 2012 Maximum [Member] Antargaz 2011 Senior Facilities [Member]	Sep. 30, 2013 Maximum [Member] Flaga [Member]	Sep. 30, 2013 Maximum [Member] UGI International [Member] Euro based variable rate term loan [Member]	Sep. 30, 2013 Matures in August 2016 [Member] UGI International [Member] Euro based variable rate term loan [Member] USD ($)	Sep. 30, 2013 Matures in August 2016 [Member] UGI International [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2011 Matures in August 2016 [Member] UGI International [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2013 Matures in September 2016 [Member] UGI International [Member] Euro based variable rate term loan [Member] USD ($)	Sep. 30, 2013 Matures in September 2016 [Member] UGI International [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2013 Maturity Date 2014 [Member] UGI International [Member] Euro based variable rate term loan [Member] USD ($)	Sep. 30, 2013 Maturity Date 2014 [Member] UGI International [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2012 Maturity Date 2014 [Member] UGI International [Member] Euro based variable rate term loan [Member] USD ($)	Sep. 30, 2012 Maturity Date 2014 [Member] UGI International [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2013 Maturity Date 2014 [Member] Minimum [Member] UGI International [Member] Euro based variable rate term loan [Member]	Sep. 30, 2013 Maturity Date 2014 [Member] Maximum [Member] UGI International [Member] Euro based variable rate term loan [Member]	Sep. 30, 2013 UGI International [Member] USD ($)	Sep. 30, 2012 UGI International [Member] USD ($)	Sep. 30, 2013 UGI International [Member] Flaga term loan due September 2016 [Member] USD ($)	Sep. 30, 2012 UGI International [Member] Flaga term loan due September 2016 [Member] USD ($)	Sep. 30, 2013 UGI International [Member] Flaga term loan due October 2016 [Member] USD ($)	Sep. 30, 2012 UGI International [Member] Flaga term loan due October 2016 [Member] USD ($)
Debt Instrument [Line Items]
Term Period of Senior Facilities Agreement	1 year				5 years
Proceeds from issuance of senior notes						€ 380,000,000
Borrowing capacity under revolving credit agreement																40,000,000														36,100,000	26,700,000		18,000,000	13,300,000
Maturities under term loan, May 2016				778,100,000				51,400,000	38,000,000																																523,400,000
Maturities under term loan, May 2017				52,400,000				46,300,000	34,200,000																																26,700,000
Maturities under term loan, March 2018				45,600,000				416,300,000	307,800,000																																500,000
Margin on credit agreement base rate borrowings																								1.75%		0.23%	2.50%		2.55%										2.625%	3.50%
Effective underlying EURIBOR rate of interest on term loan							2.45%			1.79%				2.68%																					2.16%	2.16%
Effective underlying EURIBOR rate of interest on term loan after September 2015							3.71%
Effective interest rate on term loan							4.66%	4.41%	4.41%	3.85%	4.35%			4.68%	5.18%																												1.82%
Long-term Debt		3,514,300,000		3,609,400,000								19,100,000					24,000,000																		1,900,000	1,400,000	3,600,000	2,800,000			654,400,000	573,900,000	52,000,000	0	25,800,000	24,600,000
Margin on Term Loan Base Rate Borrowings																									117.50%			252.50%															1.25%
Credit agreement																		46,000,000		6,000,000			12,000,000									40,000,000
Semi Annual Principal Payments Due													700,000
Interest rate on credit agreements																																			5.04%	5.04%	5.04%	5.04%
Line of Credit Facility, Number of Working Capital Facilities																		2
Borrowings outstanding, amount																			300,000	200,000	15,300,000	11,900,000
Line of Credit Facility, Interest Rate at Period End																			4.21%	4.21%	2.31%	2.31%
Credit agreement outstanding, amount																			38,700,000	28,600,000	24,700,000	19,200,000
Ratio of Net Debt to EBITDA		3.50	3.50
Guarantor Obligations, Maximum Exposure, Undiscounted			€ 100,000,000