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
	Mar. 31, 2011	Sep. 30, 2011 USD ($)	Sep. 30, 2011 EUR (€)	Sep. 30, 2012 USD ($)	Mar. 31, 2011 Antargaz 2011 Senior Facilities [Member]	Mar. 31, 2011 Antargaz 2011 Senior Facilities [Member] Variable Rate Term Loan [Member] EUR (€)	Sep. 30, 2011 Antargaz 2011 Senior Facilities [Member] Variable Rate Term Loan [Member]	Sep. 30, 2012 Antargaz 2011 Senior Facilities [Member] Variable Rate Term Loan [Member] EUR (€)	Sep. 30, 2012 Flaga [Member]	Dec. 31, 2011 Flaga [Member] EUR (€)	Sep. 30, 2012 International Propane [Member] EUR (€)	Sep. 30, 2011 International Propane [Member] Euro based variable rate term loan [Member]	Sep. 30, 2012 International Propane [Member] Euro based variable rate term loan [Member]	Mar. 31, 2011 International Propane [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2011 Flaga Predecessor Variable Rate Term Loan [Member] EUR (€)	Sep. 30, 2012 Flaga multi-currency working capital facility [Member] EUR (€) Working_Capital_Facility	Sep. 30, 2012 Flaga 2011 Multi Currency Working Capital Facility [Member] USD ($)	Sep. 30, 2012 Flaga 2011 Multi Currency Working Capital Facility [Member] EUR (€)	Sep. 30, 2011 Flaga 2011 Multi Currency Working Capital Facility [Member] USD ($)	Sep. 30, 2011 Flaga 2011 Multi Currency Working Capital Facility [Member] EUR (€)	Sep. 30, 2012 Flaga euro-denominated working capital facility [Member] EUR (€)	Sep. 30, 2011 Minimum [Member] Antargaz 2011 Senior Facilities [Member]	Sep. 30, 2012 Minimum [Member] Flaga [Member]	Sep. 30, 2011 Minimum [Member] International Propane [Member] Euro based variable rate term loan [Member]	Sep. 30, 2011 Maximum [Member] Antargaz 2011 Senior Facilities [Member]	Sep. 30, 2012 Maximum [Member] Flaga [Member]	Sep. 30, 2011 Maximum [Member] International Propane [Member] Euro based variable rate term loan [Member]	Sep. 30, 2011 Matures in August 2016 [Member] International Propane [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2011 Matures in September 2016 [Member] International Propane [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2012 Maturity Date 2014 [Member] International Propane [Member] Euro based variable rate term loan [Member] USD ($)	Sep. 30, 2012 Maturity Date 2014 [Member] International Propane [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2011 Maturity Date 2014 [Member] International Propane [Member] Euro based variable rate term loan [Member] USD ($)	Sep. 30, 2011 Maturity Date 2014 [Member] International Propane [Member] Euro based variable rate term loan [Member] EUR (€)	Sep. 30, 2011 Maturity Date 2014 [Member] Minimum [Member] International Propane [Member] Euro based variable rate term loan [Member]	Sep. 30, 2011 Maturity Date 2014 [Member] Maximum [Member] International Propane [Member] Euro based variable rate term loan [Member]
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														26,700,000	13,300,000
Maturities under term loan, May 2015				74,400,000				38,000,000
Maturities under term loan, May 2016				702,300,000				34,200,000
Maturities under term loan, March 2017				50,300,000				307,800,000
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%		179.00%			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%		4.35%			4.76%	5.18%
Carrying value long-term debt		2,157,700,000		3,514,300,000						19,100,000					24,000,000															3,600,000	2,800,000	5,600,000	4,200,000
Margin on Term Loan Base Rate Borrowings																							117.50%			252.50%
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																	15,300,000	11,900,000	16,500,000	12,300,000
Line of Credit Facility, Interest Rate at Period End																	2.31%	2.31%	3.39%	3.39%
Credit agreement outstanding, amount																	24,700,000	19,200,000	16,200,000	12,100,000
Ratio of Net Debt to EBITDA		3.50	3.50
Guarantor Obligations, Maximum Exposure, Undiscounted			€ 100,000,000