v2.4.0.6
Segment information (Details 3) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
AmerisourceBergen Corporation [Member]
     
Revenues Earned from Major Customers [Abstract]      
Gross product sales $ 7,556 $ 7,574 $ 7,678
Gross product sales to major customer (as defined) as a percentage of total gross revenues 34.00% 36.00% 38.00%
Gross product sales to major customer (as defined) as a percentage of U.S. gross product sales 43.00% 45.00% 47.00%
McKesson Corporation [Member]
     
Revenues Earned from Major Customers [Abstract]      
Gross product sales 5,898 4,591 3,913
Gross product sales to major customer (as defined) as a percentage of total gross revenues 27.00% 22.00% 19.00%
Gross product sales to major customer (as defined) as a percentage of U.S. gross product sales 32.00% 27.00% 24.00%
Cardinal Health, Inc. [Member]
     
Revenues Earned from Major Customers [Abstract]      
Gross product sales $ 3,245 $ 3,021 $ 2,813
Gross product sales to major customer (as defined) as a percentage of total gross revenues 15.00% 14.00% 14.00%
Gross product sales to major customer (as defined) as a percentage of U.S. gross product sales 19.00% 18.00% 17.00%