v2.4.0.6
Collaborative arrangements (Textuals 1) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Research and Development Arrangement, Contract to Perform for Others [Line Items]                      
Product sales $ 4,337 $ 4,201 $ 4,200 $ 3,901 $ 3,907 $ 3,877 [1] $ 3,893 $ 3,618 $ 16,639 $ 15,295 $ 14,660
Collaborative Arrangement With Glaxo Group Limited [Member] | Primary Territories [Member]
                     
Research and Development Arrangement, Contract to Perform for Others [Line Items]                      
Product sales                 139 62 5
Collaborative Arrangement With Glaxo Group Limited [Member] | Selling General and Administrative [Member]
                     
Research and Development Arrangement, Contract to Perform for Others [Line Items]                      
Cost recoveries                 10 30 46
Collaborative Arrangement With Glaxo Group Limited [Member] | Other Revenues [Member]
                     
Research and Development Arrangement, Contract to Perform for Others [Line Items]                      
Milestone payments received                     $ 75
[1] We recorded a $780 million legal settlement charge ($705 million, net of tax) in connection with an agreement in principle to settle allegations related to our sales and marketing practices.