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Fair Value Measurements - Amortized Cost and Fair Value of Debt Securities (Details) $ in Millions	Jun. 30, 2024 USD ($)	[1]
Fair Value Disclosures [Abstract]
Mature in less than one year	$ 216.1
Mature in one to five years	730.8
Mature in more than five years	194.5
Total Amortized Cost	1,141.4
Mature in less than one year	214.8
Mature in one to five years	727.4
Mature in more than five years	193.4
Estimated Fair Value	$ 1,135.6
[1] Available-for-sale investments are included in Short-term investments in the condensed consolidated balance sheets.

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- Definition

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

+ References

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-Topic 944
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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), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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+ References

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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), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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