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Commitments and Contingencies (Details 3)
In Millions, unless otherwise specified
9 Months Ended9 Months Ended
Sep. 30, 2011
Commercial Litigation - Cogent Inc. Delaware Court of Chancery
Claim
Sep. 30, 2011
Commercial Litigation - Cogent Inc. Los Angeles Superior Court
Claim
Sep. 30, 2011
Commercial Litigation - Avery Dennison
Patent
Sep. 30, 2011
Commercial Litigation - Meda AB
USD ($)
Sep. 30, 2011
Commercial Litigation - Acolyte Biomedica Ltd.
GBP (£)
Loss contingencies     
Damages sought by plaintiff    £ 40
Number of Avery patents for which 3M seeks a declaratory judgment  2  
Number of new lawsuits filed36   
Number of Cogent, Inc. shares held by subsidiary shareholders that have asserted appraisal rights5.8    
The estimated minimum amount the lawsuit seeks to recover   $ 200