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3. Fair Value Measurements 3. Contingent Consideration (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended
Jun. 30, 2012
Fair Value, Measurements, Recurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
Jun. 30, 2012
Fair Value, Measurements, Recurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
Jun. 30, 2012
QuantaLife [Member]
Oct. 04, 2011
QuantaLife [Member]
Jun. 30, 2012
Credit Adjusted Discount Rates Lower [Member]
QuantaLife [Member]
Jun. 30, 2012
Credit Adjusted Discount Rate Higher [Member]
QuantaLife [Member]
Jun. 30, 2012
Projected Volatility of Growth Rates Higher [Member]
QuantaLife [Member]
Jun. 30, 2012
Market Price of Risk [Member]
QuantaLife [Member]
Jun. 30, 2012
Probablity [Member]
QuantaLife [Member]
Jun. 30, 2012
Risk-Adjusted Discount Rate [Member]
QuantaLife [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Business Acquisition, Contingent Consideration, Potential Cash Payment     $ 45 $ 48            
Business Acquisition, Contingent Consideration, at Fair Value beginning of period   24.1 [1]   24.1            
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability 8.1 7.5                
Business Acquisition, Contingent Consideration, at Fair Value end of period $ 16.6 [1] $ 16.6 [1]   $ 24.1            
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Significant Inputs         0.0087 .0143 .15 .004 .95 .0094
[1] Contingent consideration liability is included in the following accounts in the Condensed Consolidated Balance Sheet (in millions): June 30, 2012 December 31, 2011Other current liabilities$9.8 $8.5Other long-term liabilities6.8 15.6 Total$16.6 $24.1