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3. Fair Value Measurements Fair Value Level Table (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016 | Jan. 06, 2016
--- | --- | --- | ---
Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Restricted Investments, at Fair Value |  | $ 4.6 | $ 4.6 |
Available-for-sale Securities, Fair Value Disclosure | [1] | 1,319.8 | 1,115.6 |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [2] | 0.5 | 0.6 |
Assets, Fair Value Disclosure |  | 1,444.5 | 1,173.7 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [3] | 1.2 | 1.3 |
Business Combination, Contingent Consideration, Liability | [4] | 23.1 | 38.5 |
Liabilities, Fair Value Disclosure |  | 24.3 | 39.8 |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Restricted Investments, at Fair Value |  | 4.6 | 4.6 |
Available-for-sale Securities, Fair Value Disclosure | [1] | 973.2 | 767.8 |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [2] | 0.0 | 0.0 |
Assets, Fair Value Disclosure |  | 1,073.8 | 790.1 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [3] | 0.0 | 0.0 |
Business Combination, Contingent Consideration, Liability | [4] | 0.0 | 0.0 |
Liabilities, Fair Value Disclosure |  | 0.0 | 0.0 |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Restricted Investments, at Fair Value |  | 0.0 | 0.0 |
Available-for-sale Securities, Fair Value Disclosure | [1] | 346.6 | 347.8 |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [2] | 0.5 | 0.6 |
Assets, Fair Value Disclosure |  | 370.7 | 383.6 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [3] | 1.2 | 1.3 |
Business Combination, Contingent Consideration, Liability | [4] | 0.0 | 0.0 |
Liabilities, Fair Value Disclosure |  | 1.2 | 1.3 |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Restricted Investments, at Fair Value |  | 0.0 | 0.0 |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [2] | 0.0 | 0.0 |
Assets, Fair Value Disclosure |  | 0.0 | 0.0 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [3] | 0.0 | 0.0 |
Business Combination, Contingent Consideration, Liability | [4] | 23.1 | 38.5 |
Liabilities, Fair Value Disclosure |  | 23.1 | 38.5 |
US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] |  | 1.1 |
US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] |  | 0.0 |
US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] |  | 1.1 |
US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] |  | 0.0 |
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 23.6 | 14.1 |
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 0.0 | 0.0 |
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 23.6 | 14.1 |
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 0.0 | 0.0 |
Foreign Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 71.6 | 11.8 |
Foreign Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 71.6 | 11.8 |
Foreign Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 0.0 | 0.0 |
Foreign Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 0.0 | 0.0 |
Domestic time deposit [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] |  | 20.0 |
Domestic time deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] |  | 0.0 |
Domestic time deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] |  | 20.0 |
Domestic time deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] |  | 0.0 |
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 24.4 | 5.9 |
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 24.4 | 5.9 |
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 0.0 | 0.0 |
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 0.0 | 0.0 |
Cash Equivalents [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 119.6 | 52.9 |
Cash Equivalents [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 96.0 | 17.7 |
Cash Equivalents [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 23.6 | 35.2 |
Cash Equivalents [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [5] | 0.0 | 0.0 |
Brokered certificates of deposit [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] |  | 3.6 |
Brokered certificates of deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] |  | 0.0 |
Brokered certificates of deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] |  | 3.6 |
Brokered certificates of deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] |  | 0.0 |
Marketable Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 973.2 | 767.8 |
Marketable Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 973.2 | 767.8 |
Marketable Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Marketable Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Municipal Obligations (Member) | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 14.3 | 15.4 |
Municipal Obligations (Member) | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Municipal Obligations (Member) | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 14.3 | 15.4 |
Municipal Obligations (Member) | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Foreign Government Obligations [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 3.0 | 4.4 |
Foreign Government Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Foreign Government Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 3.0 | 4.4 |
Foreign Government Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 200.6 | 179.4 |
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 200.6 | 179.4 |
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 70.9 | 82.5 |
US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 70.9 | 82.5 |
US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 57.8 | 62.5 |
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 57.8 | 62.5 |
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | [1] | 0.0 | 0.0 |
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability |  | 4.1 | 14.5 |
Other Noncurrent Liabilities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability |  | 19.0 | 24.0 |
Short-term Investments [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  | 387.5 | 383.2 |
Short-term Investments [Member] | Brokered certificates of deposit [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  |  | 3.6 |
Short-term Investments [Member] | Marketable Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  | 41.1 | 35.7 |
Short-term Investments [Member] | Municipal Obligations (Member) | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  | 14.3 | 15.4 |
Short-term Investments [Member] | Foreign Government Obligations [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  | 3.0 | 4.4 |
Short-term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  | 200.6 | 179.4 |
Short-term Investments [Member] | US Government Sponsored Agencies [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  | 70.9 | 82.5 |
Short-term Investments [Member] | Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  | 57.6 | 62.2 |
Other Investments [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure |  | 932.3 | $ 732.4 |
Analytical Flow Cytometer Platform [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability |  | 23.1 |  | $ 23.3
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 |  |
[1] | Available-for-sale investments are included in the following accounts in the Condensed Consolidated Balance Sheets (in millions):
| September 30, 2017 |  | December 31, 2016
Short-term investments | $ | 387.5 |  |  | $ | 383.2 |
Other investments | 932.3 |  |  | 732.4 |
Total | $ | 1,319.8 |  |  | $ | 1,115.6 |
[2] | Forward foreign exchange contracts in an asset position are included in Other current assets in the Condensed Consolidated Balance Sheets.
[3] | Forward foreign exchange contracts in a liability position are included in Other current liabilities in the Condensed Consolidated Balance Sheets.
[4] | Contingent consideration liability is included in the following accounts in the Condensed Consolidated Balance Sheets (in millions):
| September 30, 2017 |  | December 31, 2016
Other current liabilities | $ | 4.1 |  |  | $ | 14.5 |
Other long-term liabilities | 19.0 |  |  | 24.0 |
Total | $ | 23.1 |  |  | $ | 38.5 |
[5] | Cash equivalents are included in Cash and cash equivalents in the Condensed Consolidated Balance Sheets.

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
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