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Cash, Cash Equivalents and Short-Term Investments - Contractual Maturities (Details) $ in Millions	Sep. 30, 2023 USD ($)
Amortized cost
Due within one year	$ 318.0
Due between one to three years	357.5
Due after three years	61.2
Total	736.7
Estimated fair value
Due within one year	312.5
Due between one to three years	334.6
Due after three years	57.5
Total	$ 704.6

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