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4. Intangible Assets, Goodwill and Other (Details) (USD $)
 6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Goodwill [Line Items]    
Goodwill $ 493,400,000 $ 496,100,000
Accumulated impairment loss (27,200,000) (27,200,000)
Goodwill, net 466,157,000 468,933,000
Goodwill, Acquired During Period 1,100,000  
Goodwill, Purchase Accounting Adjustments (600,000)  
Currency fluctuations (3,200,000)  
Life Science [Member]
    
Goodwill [Line Items]    
Goodwill 176,200,000 176,800,000
Accumulated impairment loss (27,200,000) (27,200,000)
Goodwill, net 149,000,000 149,600,000
Goodwill, Acquired During Period 0  
Goodwill, Purchase Accounting Adjustments (600,000)  
Currency fluctuations 0  
Clinical Diagnostics [Member]
    
Goodwill [Line Items]    
Goodwill 317,200,000 319,300,000
Accumulated impairment loss 0 0
Goodwill, net 317,200,000 319,300,000
Goodwill, Acquired During Period 1,100,000  
Goodwill, Purchase Accounting Adjustments 0  
Currency fluctuations $ (3,200,000)