Balance Sheet Details and Other Financial Information - Short-Term Marketable Securities (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Debt securities, available-for-sale: | ||
| Amortized Cost | $ 1,769.2 | $ 1,972.7 |
| Gross Unrealized Gains | 0.8 | 1.7 |
| Gross Unrealized Losses | (0.7) | (1.1) |
| Estimated Market Value | 1,769.3 | 1,973.3 |
| U.S. government agencies | ||
| Debt securities, available-for-sale: | ||
| Amortized Cost | 945.5 | 1,149.4 |
| Gross Unrealized Gains | 0.3 | 1.3 |
| Gross Unrealized Losses | (0.5) | (0.6) |
| Estimated Market Value | 945.3 | 1,150.1 |
| Commercial paper | ||
| Debt securities, available-for-sale: | ||
| Amortized Cost | 143.8 | 312.2 |
| Gross Unrealized Gains | 0.0 | 0.0 |
| Gross Unrealized Losses | (0.1) | (0.1) |
| Estimated Market Value | 143.7 | 312.1 |
| Corporate debt | ||
| Debt securities, available-for-sale: | ||
| Amortized Cost | 679.9 | 511.1 |
| Gross Unrealized Gains | 0.5 | 0.4 |
| Gross Unrealized Losses | (0.1) | (0.4) |
| Estimated Market Value | $ 680.3 | $ 511.1 |