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2. Amortized Cost and Fair Value of Debt Securities (Details) $ in Millions	Mar. 31, 2023 USD ($)	[1]
Fair Value Disclosures [Abstract]
Mature in less than one year	$ 412.5
Mature in one to five years	777.2
Mature in more than five years	154.4
Total Amortized Cost	1,344.1
Mature in less than one year	409.1
Mature in one to five years	767.7
Mature in more than five years	150.8
Debt Securities, Available-for-sale	$ 1,327.6
[1] Available-for-sale investments are included in Short-term investments in the condensed consolidatedbalance sheets.

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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