2. Fair Value Measurements Fair Value Level Table (Details) - USD ($) $ in Millions | 3 Months Ended | | |
Mar. 31, 2023 | Dec. 31, 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] | $ 324.5 | | $ 322.6 | | |
Debt Securities, Available-for-sale | [2] | 1,327.6 | | | | |
Fair Value, Option, Changes in Fair Value, Gain (Loss) | [1] | 2.2 | | | | |
Foreign exchange (gains) losses, net | [1] | 4.1 | | | | |
Fair Value, Option, Loans Held as Assets [Abstract] | | | | | | |
Debt Securities | [1] | 400 | | | | |
Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions | | (8) | | | | |
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 | [3] | 7 | | 6.8 | | |
Equity Securities | [4] | 8,571.6 | | 8,530.4 | | |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | 324.5 | | 322.6 | | |
Debt Securities, Available-for-sale | [2] | 1,327.6 | | 1,300 | | |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [5] | 1.4 | | 1.5 | | |
Assets, Fair Value Disclosure | | 10,337.3 | | 10,227 | | |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [6] | 1.1 | | 6.2 | | |
Business Combination, Contingent Consideration, Liability | | 36.4 | [7] | 35.6 | | |
Liabilities, Fair Value Disclosure | | 37.5 | | 41.8 | | |
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 | [3] | 7 | | 6.8 | | |
Equity Securities | [4] | 8,571.6 | | 8,530.4 | | |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | 0 | | 0 | | |
Debt Securities, Available-for-sale | [2] | 0 | | 0 | | |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [5] | 0 | | 0 | | |
Assets, Fair Value Disclosure | | 8,614.5 | | 8,574.4 | | |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [6] | 0 | | 0 | | |
Business Combination, Contingent Consideration, Liability | | 0 | [7] | 0 | | |
Liabilities, Fair Value Disclosure | | 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 | [3] | 0 | | 0 | | |
Equity Securities | [4] | 0 | | 0 | | |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | 0 | | 0 | | |
Debt Securities, Available-for-sale | | 1,327.6 | | 1,300 | [2] | |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [5] | 1.4 | | 1.5 | | |
Assets, Fair Value Disclosure | | 1,398.3 | | 1,330 | | |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [6] | 1.1 | | 6.2 | | |
Business Combination, Contingent Consideration, Liability | | 0 | [7] | 0 | | |
Liabilities, Fair Value Disclosure | | 1.1 | | 6.2 | | |
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 | [3] | 0 | | 0 | | |
Equity Securities | [4] | 0 | | 0 | | |
Debt Securities, Trading, and Equity Securities, FV-NI | [1] | 324.5 | | 322.6 | | |
Debt Securities, Available-for-sale | [2] | 0 | | 0 | | |
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | [5] | 0 | | 0 | | |
Assets, Fair Value Disclosure | | 324.5 | | 322.6 | | |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | [6] | 0 | | 0 | | |
Business Combination, Contingent Consideration, Liability | | 36.4 | [7] | 35.6 | | |
Liabilities, Fair Value Disclosure | | 36.4 | | 35.6 | | |
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] | 3.1 | | 1.4 | | |
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 | | |
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] | 3.1 | | 1.4 | | |
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 | | |
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] | 1.5 | | 21.1 | | |
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 | | |
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] | 1.5 | | 21.1 | | |
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 | | |
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] | 44 | | 5.7 | | |
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] | 0 | | 5.7 | | |
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] | 44 | | 0 | | |
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 | | |
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] | 35.9 | | 31.5 | | |
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] | 35.9 | | 31.5 | | |
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 | | |
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 | | |
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] | 105.2 | | 65.7 | | |
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] | 35.9 | | 37.2 | | |
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] | 69.3 | | 28.5 | | |
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 | | |
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] | 20.7 | | 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 | | | | |
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] | 20.7 | | 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 | | |
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 | | |
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] | 18 | | 23.1 | | |
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 | | |
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] | 18 | | 23.1 | | |
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 | | |
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] | 13.6 | | 13.5 | | |
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 | | |
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] | 13.6 | | 13.5 | | |
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 | | |
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] | 674.2 | | 699.3 | | |
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 | | |
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] | 674.2 | | 699.3 | | |
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 | | |
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] | 293.7 | | 230.7 | | |
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 | | |
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] | 293.7 | | 230.7 | | |
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 | | |
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] | 328.1 | | 333.4 | | |
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 | | |
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] | 328.1 | | 333.4 | | |
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 | | |
Short-term Investments [Member] | Fair Value, Recurring [Member] | | | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | | | |
Equity Securities | [4] | 59.7 | | 56.5 | | |
Debt Securities, Available-for-sale | [2] | 1,327.6 | | 1,300 | | |
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] | 18 | | 23.1 | | |
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] | 13.6 | | 13.5 | | |
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] | 674.2 | | 699.3 | | |
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] | 293.7 | | 230.7 | | |
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] | 328.1 | | 333.4 | | |
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 | [3] | 1.4 | | 1.2 | | |
Equity Securities | [4] | 8,511.9 | | 8,473.9 | | |
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 | [3] | $ 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]Restricted investments are included in the following accounts in the condensed consolidated balance sheets (in millions): March 31, 2023 December 31, 2022 Restricted investments $ 5.6 $ 5.6 Other investments 1.4 1.2 Total $ 7.0 $ 6.8 March 31, 2023 December 31, 2022 Short-term investments $ 59.7 $ 56.5 Other investments 8,511.9 8,473.9 Total $ 8,571.6 $ 8,530.4 | |