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3. Fair Value Measurements Contingent Consideration (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended | 25 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value |  |  |  |  | $ 16.7 |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  |  |  | $ (6.2) | (18.1) | $ (0.4) |
Fair Value, Measurements, Recurring [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability | [1] |  |  | 8.4 | $ 16.7 |  | $ 8.4
Analytical Flow Cytometer Platform [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value |  |  |  | 8.4 |  |  | 8.4
Business Combination, Contingent Consideration, Liability |  |  |  | 8.4 |  |  | 8.4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements |  | $ (0.8) | $ (1.3) | (2.1) |  |  |
Net (decrease) increase in estimated fair value of contingent consideration included in selling, general and administrative expense |  |  |  | $ (6.2) |  |  | $ 12.2
Discount rate [Member] | Analytical Flow Cytometer Platform [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Discount Rate |  |  |  | 11.00% |  |  |
Sales milestone percentage of annual invoices [Member] | Analytical Flow Cytometer Platform [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Business Acquisition, Contingent Consideration, Potential Percentage Payout |  |  |  | 39.00% |  |  | 39.00%
Sales milestone percentage of annual invoices low [Member] | Analytical Flow Cytometer Platform [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Business Acquisition, Contingent Consideration, Potential Percentage Payout |  |  |  | 20.00% |  |  | 20.00%
Sales milestone minimum amount [Member] | Analytical Flow Cytometer Platform [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low |  |  |  | $ 0.0 |  |  | $ 0.0
Cost of debt [Member] | Analytical Flow Cytometer Platform [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Discount Rate |  |  |  | 5.10% |  |  |
[1] | Contingent consideration liabilities are included in the following accounts in the Consolidated Balance Sheets (in millions):
| December 31, 2018 |  | December 31, 2017
Other current liabilities | $ | 3.2 |  |  | $ | 2.7 |
Other long-term liabilities | 5.2 |  |  | 14.0 |
Total | $ | 8.4 |  |  | $ | 16.7 |

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