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10. Segment Information Segment Reporting
 6 Months Ended
Jun. 30, 2021
Segment Reporting [Abstract]  
Segment Reporting Disclosure [Text Block] SEGMENT INFORMATION
Information regarding operating segments for the three months ended June 30, 2021 and 2020 is as follows (in millions):
Life
Science		Clinical
Diagnostics		Other
Operations
Segment net sales 2021$334.2 $380.2 $1.5 
 2020$252.1 $283.2 $1.6 
Segment net profit (loss)2021$64.6 $60.1 $(0.3)
 2020$35.4 $10.5 $0.1 

Information regarding operating segments for the six months ended June 30, 2021 and 2020 is as follows (in millions):
Life
Science		Clinical
Diagnostics		Other
Operations
Segment net sales 2021$700.7 $738.8 $3.2 
 2020$479.2 $623.4 $5.9 
Segment net profit (loss)2021$166.9 $58.2 $(0.2)
 2020$59.1 $54.3 $1.2 

Segment results are presented in the same manner as we present our operations internally to make operating decisions and assess performance. Our chief operating decision maker ("CODM") views all operating expenses, interest expense and corporate overhead as directly supporting the strategies of our segments. As a result, starting in 2021 these costs are fully allocated to our reportable segments. Prior to this change, the difference between total segment allocated interest expense, depreciation and amortization, and the corresponding consolidated amounts was attributable to our corporate headquarters.

The historical segment information has been recast to conform to the current allocation methodology of corporate operating and other expenses to the segments.  Interest expense is charged to segments based on the carrying amount of inventory and receivables employed by that segment. The following reconciles total segment profit to consolidated income before income taxes (in millions):

Three Months EndedSix Months Ended
June 30,June 30,
 2021202020212020
Total segment profit $124.4 $46.0 $224.9 $114.6 
Foreign currency exchange gains (losses), net1.8 (0.8)1.7 (1.7)
Change in fair market value of equity securities1,030.7 1,183.5 2,210.1 2,011.2 
Other (expense) income, net(0.1)17.2 17.3 20.5 
Consolidated income before income taxes$1,156.8 $1,245.9 $2,454.0 $2,144.6