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Cash And Cash Equivalents, Short-Term Bank Deposits And Marketable Securities - Schedule Of Cash And Cash Equivalents And Short Term Investments (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Cash Cash Equivalents And Short Term Investments [Line Items]
Cash	$ 65.8	$ 170.8
Money market funds	95.5	6.6
Short term deposits	34.7	94.5
Total Cash and cash equivalents	196.0	271.9
Short-term bank deposits	431.1	492.5
Marketable securities:
Government and corporate debentures	1,010.5	929.3
Total Marketable securities	2,876.1	3,019.0
Total Cash and cash equivalents, short-term bank deposits and marketable securities	3,503.2	3,783.4
Government And Corporate Debentures Fixed Interest Rate [Member]
Marketable securities:
Government and corporate debentures	2,025.8	2,262.5
Government Sponsored Enterprises Debentures [Member]
Marketable securities:
Government and corporate debentures	755.0	641.4
Government And Corporate Debentures Floating Interest Rate [Member]
Marketable securities:
Government and corporate debentures	$ 95.3	$ 115.1

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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