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v3.22.2.2

2. Fair Value Measurements Fair Value Level Table (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022 | Aug. 03, 2022 | Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | $ 247.7 |  | $ 247.7 |  |  | $ 443.1 |
Debt Securities, Available-for-sale | [2] | 1,280.2 |  | 1,280.2 |  |  |  |
Business Combination, Contingent Consideration, Liability |  | 36.1 | [3] | 36.1 | [3] | $ 36.1 |  |
Fair Value, Option, Changes in Fair Value, Gain (Loss) |  | 19.4 |  | (149.0) | [1] |  |  |
Foreign exchange (gains) losses, net | [1] |  |  | (46.4) |  |  |  |
Fair Value, Option, Loans Held as Assets [Abstract] |  |  |  |  |  |  |  |
Debt Securities | [1] |  |  |  |  |  | $ 400.0 |
Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions |  | 20.0 |  | 63.8 | [1] |  |  |
Derivative, Forward Interest Rate |  |  |  |  |  |  | 1.50% |
Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Restricted Investments, at Fair Value | [4] | 6.8 |  | 6.8 |  |  | $ 6.9 |
Equity Securities | [5] | 7,224.6 |  | 7,224.6 |  |  | 13,977.5 |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | 247.7 |  | 247.7 |  |  | 443.1 |
Debt Securities, Available-for-sale | [2] | 1,280.2 |  | 1,280.2 |  |  | 327.7 |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [6] | 3.5 |  | 3.5 |  |  | 1.7 |
Assets, Fair Value Disclosure |  | 8,891.0 |  | 8,891.0 |  |  | 14,899.5 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [7] | 7.5 |  | 7.5 |  |  | 2.8 |
Business Combination, Contingent Consideration, Liability | [3] | 36.1 |  | 36.1 |  |  |  |
Liabilities, Fair Value Disclosure |  | 43.6 |  | 43.6 |  |  | 2.8 |
Fair Value, 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] | 6.8 |  | 6.8 |  |  | 6.9 |
Equity Securities | [5] | 7,224.6 |  | 7,224.6 |  |  | 13,977.5 |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | 0.0 |  | 0.0 |  |  | 0.0 |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [6] | 0.0 |  | 0.0 |  |  | 0.0 |
Assets, Fair Value Disclosure |  | 7,310.9 |  | 7,310.9 |  |  | 14,042.3 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [7] | 0.0 |  | 0.0 |  |  | 0.0 |
Business Combination, Contingent Consideration, Liability | [3] | 0.0 |  | 0.0 |  |  |  |
Liabilities, Fair Value Disclosure |  | 0.0 |  | 0.0 |  |  | 0.0 |
Fair Value, 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 | [4] | 0.0 |  | 0.0 |  |  | 0.0 |
Equity Securities | [5] | 0.0 |  | 0.0 |  |  | 0.0 |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | 0.0 |  | 0.0 |  |  | 0.0 |
Debt Securities, Available-for-sale |  | 1,280.2 |  | 1,280.2 |  |  | 327.7 | [2]
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [6] | 3.5 |  | 3.5 |  |  | 1.7 |
Assets, Fair Value Disclosure |  | 1,332.4 |  | 1,332.4 |  |  | 414.1 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [7] | 7.5 |  | 7.5 |  |  | 2.8 |
Business Combination, Contingent Consideration, Liability | [3] | 0.0 |  | 0.0 |  |  |  |
Liabilities, Fair Value Disclosure |  | 7.5 |  | 7.5 |  |  | 2.8 |
Fair Value, 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 | [4] | 0.0 |  | 0.0 |  |  | 0.0 |
Equity Securities | [5] | 0.0 |  | 0.0 |  |  | 0.0 |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | 247.7 |  | 247.7 |  |  | 443.1 |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [6] | 0.0 |  | 0.0 |  |  | 0.0 |
Assets, Fair Value Disclosure |  | 247.7 |  | 247.7 |  |  | 443.1 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [7] | 0.0 |  | 0.0 |  |  | 0.0 |
Business Combination, Contingent Consideration, Liability | [3] | 36.1 |  | 36.1 |  |  |  |
Liabilities, Fair Value Disclosure |  | 36.1 |  | 36.1 |  |  | 0.0 |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [8] | 4.5 |  | 4.5 |  |  | 0.1 |
Asset-backed Securities [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
Asset-backed Securities [Member] | Fair Value, 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 | [8] | 4.5 |  | 4.5 |  |  | 0.1 |
Asset-backed Securities [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
Commercial Paper [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [8] | 24.7 |  | 24.7 |  |  | 39.8 |
Commercial Paper [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
Commercial Paper [Member] | Fair Value, 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 | [8] | 24.7 |  | 24.7 |  |  | 39.8 |
Commercial Paper [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
Time Deposits [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [8] | 18.2 |  | 18.2 |  |  | 17.3 |
Time Deposits [Member] | Fair Value, 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 | [8] | 18.2 |  | 18.2 |  |  | 7.2 |
Time Deposits [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 10.1 |
Time Deposits [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
Money Market Funds [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [8] | 61.3 |  | 61.3 |  |  | 50.7 |
Money Market Funds [Member] | Fair Value, 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 | [8] | 61.3 |  | 61.3 |  |  | 50.7 |
Money Market Funds [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
Money Market Funds [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
Cash Equivalents [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [8] | 128.2 |  | 128.2 |  |  | 142.6 |
Cash Equivalents [Member] | Fair Value, 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 | [8] | 79.5 |  | 79.5 |  |  | 57.9 |
Cash Equivalents [Member] | Fair Value, 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 | [8] | 48.7 |  | 48.7 |  |  | 84.7 |
Cash Equivalents [Member] | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
US Treasury Securities | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [8] | 19.5 |  | 19.5 |  |  | 33.6 |
US Treasury Securities | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  |  |
US Treasury Securities | Fair Value, 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 | [8] | 19.5 |  | 19.5 |  |  | 33.6 |
US Treasury Securities | Fair Value, 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 | [8] | 0.0 |  | 0.0 |  |  | 0.0 |
Foreign Government Debt [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [8] |  |  |  |  |  | 0.8 |
Foreign Government Debt [Member] | Fair Value, 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 | [8] |  |  |  |  |  | 0.0 |
Foreign Government Debt [Member] | Fair Value, 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 | [8] |  |  |  |  |  | 0.8 |
Foreign Government Debt [Member] | Fair Value, 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 | [8] |  |  |  |  |  | 0.0 |
Municipal Notes | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | [8] |  |  |  |  |  | 0.3 |
Municipal Notes | Fair Value, 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 | [8] |  |  |  |  |  | 0.0 |
Municipal Notes | Fair Value, 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 | [8] |  |  |  |  |  | 0.3 |
Municipal Notes | Fair Value, 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 | [8] |  |  |  |  |  | 0.0 |
Foreign Government Debt [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] |  |  |  |  |  | 3.8 |
Foreign Government Debt [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] |  |  |  |  |  | 0.0 |
Foreign Government Debt [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] |  |  |  |  |  | 3.8 |
Foreign Government Debt [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] |  |  |  |  |  | 0.0 |
Municipal Obligations (Member) | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 36.2 |  | 36.2 |  |  | 9.0 |
Municipal Obligations (Member) | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Municipal Obligations (Member) | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 36.2 |  | 36.2 |  |  | 9.0 |
Municipal Obligations (Member) | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Foreign Government Obligations [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 14.1 |  | 14.1 |  |  | 1.0 |
Foreign Government Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Foreign Government Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 14.1 |  | 14.1 |  |  | 1.0 |
Foreign Government Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 665.1 |  | 665.1 |  |  | 182.3 |
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 665.1 |  | 665.1 |  |  | 182.3 |
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
US Government Sponsored Agencies [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 224.5 |  | 224.5 |  |  | 44.3 |
US Government Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
US Government Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 224.5 |  | 224.5 |  |  | 44.3 |
US Government Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 340.3 |  | 340.3 |  |  | 87.3 |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 340.3 |  | 340.3 |  |  | 87.3 |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 0.0 |  | 0.0 |  |  | 0.0 |
Short-term Investments [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Equity Securities | [5] | 52.0 |  | 52.0 |  |  | 71.4 |
Debt Securities, Available-for-sale | [2] | 1,280.2 |  | 1,280.2 |  |  | 327.7 |
Short-term Investments [Member] | Foreign Government Debt [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] |  |  |  |  |  | 3.8 |
Short-term Investments [Member] | Municipal Obligations (Member) | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 36.2 |  | 36.2 |  |  | 9.0 |
Short-term Investments [Member] | Foreign Government Obligations [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 14.1 |  | 14.1 |  |  | 1.0 |
Short-term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 665.1 |  | 665.1 |  |  | 182.2 |
Short-term Investments [Member] | US Government Sponsored Agencies [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 224.5 |  | 224.5 |  |  | 44.3 |
Short-term Investments [Member] | Asset-backed Securities [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] | 340.3 |  | 340.3 |  |  | 87.4 |
Other Investments [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Restricted Investments, at Fair Value | [4] | 1.2 |  | 1.2 |  |  | 1.3 |
Equity Securities | [5] | 7,172.6 |  | 7,172.6 |  |  | 13,906.1 |
Restricted investment [Member] | Fair Value, Recurring [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Restricted Investments, at Fair Value | [4] | $ 5.6 |  | $ 5.6 |  |  | $ 5.6 |
[1] | The Loan under the fair value option is included in Other investments in the condensed consolidated balance sheets.
[2] | Available-for-sale investments are included in Short-term investments in the condensed consolidatedbalance sheets.
[3] | Contingent considerations in a liability position are included in Other long-term liabilities in the condensed consolidated balance sheets.
[4] | Restricted investments are included in the following accounts in the condensed consolidated balance sheets (in millions):
| September 30, 2022 |  | December 31, 2021
Restricted investments | $ | 5.6 |  |  | $ | 5.6 |
Other investments | 1.2 |  |  | 1.3 |
Total | $ | 6.8 |  |  | $ | 6.9 |
[5] | Equity securities are included in the following accounts in the condensed consolidated balance sheets (in millions):
| September 30, 2022 |  | December 31, 2021
Short-term investments | $ | 52.0 |  |  | $ | 71.4 |
Other investments | 7,172.6 |  |  | 13,906.1 |
Total | $ | 7,224.6 |  |  | $ | 13,977.5 |
[6] | Forward foreign exchange contracts in an asset position are included in Other current assets in the condensed consolidated balance sheets.
[7] | Forward foreign exchange contracts in a liability position are included in Other current liabilities in the condensed consolidated balance sheets.
[8] | Cash equivalents are included in Cash and cash equivalents in the condensed consolidated balance sheets.

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