Discontinued Operations (Details)	12 Months Ended					12 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2013 AmerisourceBergen Canada Corporation [Member] USD ($)	Sep. 30, 2013 AmerisourceBergen Canada Corporation [Member] CAD	Sep. 30, 2013 AndersonBrecon [Member] USD ($)
Discontinued Operations Details [Abstract]
Disposal Group Including Discontinued Operation Revenue	$ 1,181,231,000	$ 1,639,684,000	$ 1,521,899,000
Disposal Group Including Discontinued Operation Operating Income Loss	(50,090,000)	(37,534,000)	12,652,000
disposal group accounts receivable		187,179,000
disposal group inventory		249,463,000
disposal group property plant and equipment		131,907,000
Disposal Group Goodwill and Other Intangible Assets		85,163,000
disposal group other assets		9,141,000
Assets of Disposal Group		662,853,000
disposal group accounts payable		152,110,000
disposal group accrued liabilities		16,554,000
disposal group other liabilities		71,042,000
Liabilities of Disposal Group		239,706,000
Disposal Group Net Assets		423,147,000
Income Statement, Balance Sheet and Additional Disclosures by Disposal Group Including Discontinued Operations [Line Items]
Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax				(143,700,000)		114,100,000
Goodwill, Impairment Loss			3,000,000	26,900,000
proceeds from sales of business				67,900,000		306,500,000
Discontinued Operations Note Due from Buyer					50,000,000
Discontinued Operations Annual Interest Rate on Note Due from Buyer					3.00%
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized Upon Sale or Liquidation, Net of Tax	$ 9,300,000