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Fair Value Measurements - Amortized Cost and Fair Value of Debt Securities (Details)
$ in Millions
Jun. 30, 2025
USD ($)
 [1]
Fair Value Disclosures [Abstract]  
Mature in less than one year $ 53.8
Mature in one to five years 603.5
Mature in more than five years 256.6
Total Amortized Cost 913.9
Mature in less than one year 54.0
Mature in one to five years 608.8
Mature in more than five years 257.5
Estimated Fair Value $ 920.3
[1] Available-for-sale investments are included in Short-term investments in the condensed consolidated balance sheets.