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4. Intangible Assets, Goodwill and Other (Details) (USD $)
 3 Months Ended
Mar. 31, 2012
Dec. 31, 2011
Goodwill [Line Items]    
Goodwill $ 507,300,000 $ 496,100,000
Accumulated impairment loss (27,200,000) (27,200,000)
Goodwill, net 480,060,000 468,933,000
Goodwill, Acquired During Period 1,100,000  
Currency fluctuations 10,100,000  
Life Science [Member]
    
Goodwill [Line Items]    
Goodwill 176,800,000 176,800,000
Accumulated impairment loss (27,200,000) (27,200,000)
Goodwill, net 149,600,000 149,600,000
Goodwill, Acquired During Period 0  
Currency fluctuations 0  
Clinical Diagnostics [Member]
    
Goodwill [Line Items]    
Goodwill 330,500,000 319,300,000
Accumulated impairment loss 0 0
Goodwill, net 330,500,000 319,300,000
Goodwill, Acquired During Period 1,100,000  
Currency fluctuations $ 10,100,000