Document and Entity Information	3 Months Ended
	Dec. 31, 2012	Jan. 31, 2013
Entity Information [Line Items]
Entity Registrant Name	AMERIGAS PARTNERS LP
Entity Central Index Key	0000932628
Document Type	10-Q
Document Period End Date	Dec. 31, 2012
Amendment Flag	false
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		92,816,905