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4. Intangible Assets, Goodwill and Other (Details) (USD $)
 9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Goodwill [Line Items]    
Goodwill $ 516,600,000 $ 496,100,000
Accumulated impairment loss (27,200,000) (27,200,000)
Goodwill, net 489,355,000 468,933,000
Goodwill, Acquired During Period 21,500,000  
Goodwill, Purchase Accounting Adjustments (600,000)  
Currency fluctuations (400,000)  
Life Science [Member]
    
Goodwill [Line Items]    
Goodwill 193,600,000 176,800,000
Accumulated impairment loss (27,200,000) (27,200,000)
Goodwill, net 166,400,000 149,600,000
Goodwill, Acquired During Period 17,400,000  
Goodwill, Purchase Accounting Adjustments (600,000)  
Currency fluctuations 0  
Clinical Diagnostics [Member]
    
Goodwill [Line Items]    
Goodwill 323,000,000 319,300,000
Accumulated impairment loss 0 0
Goodwill, net 323,000,000 319,300,000
Goodwill, Acquired During Period 4,100,000  
Goodwill, Purchase Accounting Adjustments 0  
Currency fluctuations $ (400,000)