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Balance Sheet Details and Other Financial Information - Schedule of Short-Term Marketable Securities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |
Amortized Cost | $ 1,972.7 | $ 2,157.4
Gross Unrealized Gains | 1.7 | 1.3
Gross Unrealized Losses | (1.1) | (0.9)
Estimated Market Value | 1,973.3 | 2,157.8
U.S. government agencies |  |
Condensed Financial Statements, Captions [Line Items] |  |
Amortized Cost | 1,149.4 | 1,611.8
Gross Unrealized Gains | 1.3 | 1.2
Gross Unrealized Losses | (0.6) | (0.5)
Estimated Market Value | 1,150.1 | 1,612.5
Commercial paper |  |
Condensed Financial Statements, Captions [Line Items] |  |
Amortized Cost | 312.2 | 184.8
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses | (0.1) | (0.1)
Estimated Market Value | 312.1 | 184.7
Corporate debt |  |
Condensed Financial Statements, Captions [Line Items] |  |
Amortized Cost | 511.1 | 360.8
Gross Unrealized Gains | 0.4 | 0.1
Gross Unrealized Losses | (0.4) | (0.3)
Estimated Market Value | $ 511.1 | $ 360.6

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