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Partnership Issuance of Common Units (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
Jun. 30, 2012
Sep. 30, 2011
Jun. 30, 2011
Mar. 21, 2012
AmeriGas Partners [Member]
Mar. 21, 2012
AmeriGas Partners [Member]
Senior Note [Member]
Mar. 21, 2012
AmeriGas Partners [Member]
IPO [Member]
Partnership Issuance of Common Units (Textual) [Abstract]            
Number of Common Units sold in underwritten public offering (in shares) 115,623,094 115,507,094 115,507,094     7,000,000
Public offering price (in dollars per unit)           $ 41.25
Net proceeds from issue of share and capital contribution           $ 0
Redeem amount of net proceeds from issue of share and capital contribution       $ 0    
Percentage senior notes due (as a percent)         6.50%