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4. Intangible Assets, Goodwill and Other (Tables)
 3 Months Ended
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes to goodwill by segment Changes to goodwill by segment were as follows (in millions):
 
Life
Science
 
Clinical
Diagnostics
 
Total
Balances as of January 1, 2017:
 
 
 
 
 
Goodwill
$
207.1

 
$
311.7

 
$
518.8

Accumulated impairment losses
(27.2
)
 
(14.5
)
 
(41.7
)
Goodwill, net
179.9

 
297.2

 
477.1

 
 
 
 
 
 
Acquisitions
34.8

 
—

 
34.8

Currency fluctuations
0.2

 
4.1

 
4.3

 
 
 
 
 
 
Balances as of March 31, 2017:
 
 
 
 
 
Goodwill
242.1

 
315.8

 
557.9

Accumulated impairment losses
(27.2
)
 
(14.5
)
 
(41.7
)
Goodwill, net
$
214.9

 
$
301.3

 
$
516.2



In conjunction with the purchase of certain assets from Propel in January 2016 (see Note 2, "Acquisitions"), we recorded $0.1 million of goodwill and $32.7 million of definite-lived intangible assets: $29.7 million of developed product technology and $3.0 million of covenants not to compete.

In conjunction with the purchase of all the issued and outstanding stock of RainDance Technologies, Inc. in February 2017 (see Note 2, "Acquisitions), we recorded $34.8 million of goodwill and $35.0 million for licenses.
Schedule of identifiable purchased intangible assets with definite lives Information regarding our identifiable purchased intangible assets with definite lives is as follows (in millions):
 
March 31, 2017
 
Average
Remaining
Life (years)
 
Purchase
Price
 
Accumulated
Amortization
 
Net
Carrying
Amount
Customer relationships/lists
1-8
 
$
85.7

 
$
(55.1
)
 
$
30.6

Know how
1-9
 
184.0

 
(140.6
)
 
43.4

Developed product technology
2-12
 
126.7

 
(58.9
)
 
67.8

Licenses
1-14
 
74.1

 
(31.4
)
 
42.7

Tradenames
4-8
 
3.6

 
(2.7
)
 
0.9

Covenants not to compete
2-7
 
7.8

 
(2.6
)
 
5.2

     Total definite-lived intangible assets
 
 
$
481.9

 
$
(291.3
)
 
$
190.6


 
December 31, 2016
 
Average
Remaining
Life (years)
 
Purchase
Price
 
Accumulated
Amortization
 
Net
Carrying
Amount
Customer relationships/lists
1-8
 
$
84.4

 
$
(52.8
)
 
$
31.6

Know how
1-9
 
182.6

 
(136.9
)
 
45.7

Developed product technology
3-12
 
125.9

 
(56.3
)
 
69.6

Licenses
1-9
 
39.0

 
(30.6
)
 
8.4

Tradenames
4-8
 
3.5

 
(2.5
)
 
1.0

Covenants not to compete
2-9
 
7.8

 
(2.5
)
 
5.3

     Total definite-lived intangible assets
 
 
$
443.2

 
$
(281.6
)
 
$
161.6
Finite-lived Intangible Assets Amortization Expense [Table Text Block] Amortization expense related to purchased intangible assets is as follows (in millions):

 
Three Months Ended
 
March 31,
 
2017
 
2016
 
 
 
 
Amortization expense
$
6.9

 
$
9.4