Summary of Significant Accounting Policies (Policies)

6 Months Ended

Mar. 31, 2014

Summary of Significant Accounting Policies [Abstract]

Consolidation Policy [Policy Text Block]

The accompanying financial statements present the consolidated financial position, results of operations and cash flows of AmerisourceBergen Corporation and its wholly owned subsidiaries (the “Company”) as of the dates and for the periods indicated. All intercompany accounts and transactions have been eliminated in consolidation.

Basis of Accounting [Policy Text Block]

The accompanying unaudited consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information, the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. In the opinion of management, all adjustments (consisting only of normal recurring accruals, except as otherwise disclosed herein) considered necessary to present fairly the financial position as of March 31, 2014 and the results of operations and cash flows for the interim periods ended March 31, 2014 and 2013 have been included. Certain information and footnote disclosures normally included in financial statements presented in accordance with U.S. GAAP, but which are not required for interim reporting purposes, have been omitted. The accompanying unaudited consolidated financial statements should be read in conjunction with the financial statements and notes thereto included in the Company'sAnnual Report on Form 10-K for the fiscal year ended September 30, 2013.

Use of Estimates, Policy [Policy Text Block]

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual amounts could differ from these estimated amounts.

Reclassifications [Policy Text Block]

Certain reclassifications have been made to prior year amounts in order to conform to the current year presentation.

New Accounting Pronouncements Policy [Policy Text Block]

As of March 31, 2014, there were no recently issued accounting standards that will have a material impact on our financial position or results of operations upon their adoption.