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3. Fair Value Measurements (Tables)
 3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]  
Debt Securities, Available-for-sale [Table Text Block] Available-for-sale investments consist of the following (in millions):

 
March 31, 2019
 
Amortized
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
Estimated
Fair
Value
Short-term investments:
 
 
 
 
 
 
 
Corporate debt securities
$
194.1

 
$
0.5

 
$
(0.4
)
 
$
194.2

Municipal obligations
10.9

 
—

 
—

 
10.9

Asset-backed securities
66.8

 
0.1

 
(0.2
)
 
66.7

U.S. government sponsored agencies
80.1

 
0.3

 
(0.5
)
 
79.9

Foreign government obligations
3.0

 
—

 
—

 
3.0

  Other foreign obligations
2.8

 
—

 
—

 
2.8

 
357.7

 
0.9

 
(1.1
)
 
357.5

Long-term investments:
 
 
 
 
 
 
 
Asset-backed securities
0.1

 
—

 
—

 
0.1

 
0.1

 
—

 
—

 
0.1

Total
$
357.8

 
$
0.9

 
$
(1.1
)
 
$
357.6
Schedule of financial assets and liabilities carried at fair value on a recurring basis
Financial assets and liabilities carried at fair value and measured on a recurring basis as of March 31, 2019 are classified in the hierarchy as follows (in millions):

 
Level 1
 
Level 2
 
Level 3
 
Total
Financial Assets Carried at Fair Value:
 
 
 
 
 
 
 
Cash equivalents:
 
 
 
 
 
 
 
Commercial paper
$
—

 
$
96.1

 
$
—

 
$
96.1

Asset backed
—

 
0.4

 
—

 
0.4

Time deposits
10.0

 
10.0

 
—

 
20.0

Money market funds
39.7

 
—

 
—

 
39.7

Total cash equivalents (a)
49.7

 
106.5

 
—

 
156.2

Restricted investment
5.6

 
—

 
—

 
5.6

Equity securities (b)
3,692.7

 
—

 
—

 
3,692.7

Available-for-sale investments:
 
 
 
 
 
 
 
Corporate debt securities
—

 
194.2

 
—

 
194.2

U.S. government sponsored agencies
—

 
79.9

 
—

 
79.9

Foreign government obligations
—

 
3.0

 
—

 
3.0

Other Foreign Obligations
—

 
2.8

 
—

 
2.8

Municipal obligations
—

 
10.9

 
—

 
10.9

Asset-backed securities
—

 
66.8

 
—

 
66.8

Total available-for-sale investments (c)
—

 
357.6

 
—

 
357.6

Forward foreign exchange contracts (d)
—

 
0.6

 
—

 
0.6

Total financial assets carried at fair value
$
3,748.0

 
$
464.7

 
$
—

 
$
4,212.7

 
 
 
 
 
 
 
 
Financial Liabilities Carried at Fair Value:
 
 
 
 
 
 
 
Forward foreign exchange contracts (e)
$
—

 
$
0.7

 
$
—

 
$
0.7

Contingent consideration (f)
—

 
—

 
6.5

 
6.5

Total financial liabilities carried at fair value
$
—

 
$
0.7

 
$
6.5

 
$
7.2



Financial assets and liabilities carried at fair value and measured on a recurring basis as of December 31, 2018 are classified in the hierarchy as follows (in millions):

 
Level 1
 
Level 2
 
Level 3
 
Total
Financial Assets Carried at Fair Value:
 
 
 
 
 
 
 
Cash equivalents:
 
 
 
 
 
 
 
Commercial paper
$
—

 
$
77.8

 
$
—

 
$
77.8

Time deposits
22.7

 
10.0

 
—

 
32.7

Asset-backed securities
—

 
0.3

 
—

 
0.3

Money market funds
36.9

 
—

 
—

 
36.9

Total cash equivalents (a)
59.6

 
88.1

 
—

 
147.7

Restricted investment
5.6

 
—

 
—

 
5.6

Equity securities (b)
2,672.9

 
—

 
—

 
2,672.9

Available-for-sale investments:
 
 
 
 
 
 
 
Corporate debt securities
—

 
215.0

 
—

 
215.0

U.S. government sponsored agencies
—

 
80.3

 
—

 
80.3

Foreign government obligations
—

 
3.6

 
—

 
3.6

Municipal obligations
—

 
11.0

 
—

 
11.0

Asset-backed securities
—

 
63.3

 
—

 
63.3

Total available-for-sale investments (c)
—

 
373.2

 
—

 
373.2

Forward foreign exchange contracts (d)
—

 
0.6

 
—

 
0.6

Total financial assets carried at fair value
$
2,738.1

 
$
461.9


$
—


$
3,200.0

 
 
 
 
 
 
 
 
Financial Liabilities Carried at Fair Value:
 
 
 
 
 
 
 
Forward foreign exchange contracts (e)
$
—

 
$
0.7

 
$
—

 
$
0.7

Contingent consideration (f)
—

 
—

 
8.4

 
8.4

Total financial liabilities carried at fair value
$
—

 
$
0.7

 
$
8.4

 
$
9.1


(a)
Cash equivalents are included in Cash and cash equivalents in the Condensed Consolidated Balance Sheets.

(b)
Equity securities are included in the following accounts in the Condensed Consolidated Balance Sheets (in millions):
 
March 31, 2019
Short-term investments
$
45.7

Other investments
3,647.0

        Total
$
3,692.7



The unrealized gains on our equity securities for the first quarter of 2019 are $1,059.2 million and are primarily due to our investment in Sartorius AG and is recorded in our Condensed Consolidated Statements of Income.

(c)Available-for-sale investments are included in the following accounts in the Condensed Consolidated Balance Sheets (in millions):
 
March 31, 2019
 
December 31, 2018
Short-term investments
$
357.5

 
$
373.0

Other investments
0.1

 
0.2

Total
$
357.6

 
$
373.2




(d) Forward foreign exchange contracts in an asset position are included in Other current assets in the Condensed Consolidated Balance Sheets.

(e) Forward foreign exchange contracts in a liability position are included in Other current liabilities in the Condensed Consolidated Balance Sheets.

(f) Contingent consideration liability is included in the following accounts in the Condensed Consolidated Balance Sheets (in millions):

 
March 31, 2019
 
December 31, 2018
Other current liabilities
$
3.4

 
$
3.2

Other long-term liabilities
3.1

 
5.2

   Total
$
6.5

 
$
8.4
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] The following table provides a reconciliation of the Level 3 analytical flow cytometer platform contingent consideration liabilities measured at estimated fair value (in millions):

December 31, 2018
$
8.4

Payment of sales milestone
(1.4
)
Decrease in estimated fair value of contingent consideration included in Selling, general and administrative expense
(0.5
)
March 31, 2019
$
6.5
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] The following table provides quantitative information about Level 3 inputs for fair value measurement of our analytical flow cytometer platform contingent consideration liability as of March 31, 2019. Significant increases or decreases in these inputs in isolation could result in a significantly lower or higher fair value measurement.
 
 
 
 
 
Valuation Technique
Unobservable Input
 
Analytical flow cytometer platform
Probability-weighted income approach
Sales milestones:
 
 
 
Discount rate
12.0
%
 
 
Cost of debt
4.7
%
 
 
 
 
Schedule of available-for-sale investments Available-for-sale investments consist of the following (in millions):

 
December 31, 2018
 
Amortized
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
Estimated
Fair
Value
Short-term investments:
 
 
 
 
 
 
 
Corporate debt securities
$
216.2

 
$
0.1

 
$
(1.3
)
 
$
215.0

Municipal obligations
11.1

 
—

 
(0.1
)
 
11.0

Asset-backed securities
63.5

 
—

 
(0.4
)
 
63.1

U.S. government sponsored agencies
80.9

 
0.2

 
(0.8
)
 
80.3

Foreign government obligations
3.6

 
—

 
—

 
3.6

 
375.3

 
0.3

 
(2.6
)
 
373.0

Long-term investments:
 
 
 
 
 
 
 
Asset-backed securities
0.2

 
—

 
—

 
0.2

 
0.2

 
—

 
—

 
0.2

Total
$
375.5

 
$
0.3

 
$
(2.6
)
 
$
373.2
Summary of fair value of gross unrealized losses for investments with unrealized losses The following is a summary of investments with gross unrealized losses and the associated fair value (in millions):
 
March 31, 2019
 
December 31, 2018
Fair value of investments in a loss position 12 months or more
$
106.4

 
$
117.9

Fair value of investments in a loss position less than 12 months
$
97.4

 
$
193.0

Gross unrealized losses for investments in a loss position 12 months or more
$
1.0

 
$
1.8

Gross unrealized losses for investments in a loss position less than 12 months
$
0.1

 
$
0.8
Discussion of current derivative risk management The following is a summary of our forward foreign exchange contracts (in millions):
 
March 31,
 
2019
Contracts maturing in April through June 2019 to sell foreign currency:
 
Notional value
$
41.9

Unrealized loss
$
0.2

Contracts maturing in April through June 2019 to purchase foreign currency:
 
Notional value
$
249.9

Unrealized loss
$
0.1
Summary of amortized cost and estimated fair value of debt securities by contractual maturity date The following is a summary of the amortized cost and estimated fair value of our debt securities at March 31, 2019 by contractual maturity date (in millions):
 
Amortized
Cost
 
Estimated Fair
Value
Mature in less than one year
$
129.9

 
$
129.8

Mature in one to five years
175.8

 
175.8

Mature in more than five years
52.1

 
52.0

Total
$
357.8

 
$
357.6
Estimated fair value of financial instruments
The estimated fair value of our long-term debt discussed above and the level of the fair value hierarchy within which the fair value measurement is categorized are as follows (in millions):
 
March 31, 2019
 
December 31, 2018
 
Carrying 
Amount 
 
Estimated 
Fair 
Value 
 
Fair Value Hierarchy Level
 
Carrying 
Amount 
 
Estimated 
Fair 
Value 
 
Fair Value Hierarchy Level
Total long-term debt, excluding leases and current maturities
$
423.9

 
$
436.9

 
2
 
$
423.7

 
$
435.8

 
2