Discontinued Operations (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Anderson Brecon and AmerisourceBergen Canada Corporation [Member]
Income Statement Balance Sheet and Additional Disclosures by Disposal Groups Including Discontinued Operations [Line Items]
disposal group including discontinued operation revenue	$ 0	$ 441,277,000	$ 0	$ 915,508,000
disposal group including discontinued operation operating income	0	(154,561,000)	(7,546,000)	(156,613,000)
AmerisourceBergen Canada Corporation [Member]
Income Statement Balance Sheet and Additional Disclosures by Disposal Groups Including Discontinued Operations [Line Items]
Discontinued Operation Provision for Loss Gain on Disposal Net of Tax		134,800,000		134,800,000
Goodwill Impairment Loss		$ 26,900,000		$ 26,900,000