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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Fair value of financial and nonfinancial obligations.

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Fair value, as of the balance sheet date, of potential payments under the contingent consideration arrangement including cash and shares.

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Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Liabilities
Increase in fair value of contingent consideration liability	$ 4.1
Recurring fair value measurements \| Other income (expense), net
Liabilities
Net unrealized gain (loss) on securities	(5.3)	$ 5.6
Recurring fair value measurements \| Level 1
Assets
Total assets	1,052.0		$ 829.6
Liabilities
Contingent consideration	0.0		0.0
Total liabilities	0.0		0.0
Recurring fair value measurements \| Level 1 \| Money market funds
Assets
Total assets	836.5		649.8
Recurring fair value measurements \| Level 1 \| Time deposits
Assets
Total assets	196.9		155.9
Recurring fair value measurements \| Level 1 \| U.S. government and agency securities
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 1 \| Corporate debt securities
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 1 \| Equity securities
Assets
Total assets	18.6		23.9
Recurring fair value measurements \| Level 2
Assets
Total assets	3,275.9		3,042.7
Liabilities
Contingent consideration	0.0		0.0
Total liabilities	0.0		0.0
Recurring fair value measurements \| Level 2 \| Money market funds
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 2 \| Time deposits
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 2 \| U.S. government and agency securities
Assets
Total assets	2,686.7		2,473.3
Recurring fair value measurements \| Level 2 \| Corporate debt securities
Assets
Total assets	589.2		569.4
Recurring fair value measurements \| Level 2 \| Equity securities
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 3
Assets
Total assets	0.0		0.0
Liabilities
Contingent consideration	28.8		24.7
Total liabilities	28.8		24.7
Recurring fair value measurements \| Level 3 \| Money market funds
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 3 \| Time deposits
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 3 \| U.S. government and agency securities
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 3 \| Corporate debt securities
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Level 3 \| Equity securities
Assets
Total assets	0.0		0.0
Recurring fair value measurements \| Balance
Assets
Total assets	4,327.9		3,872.3
Liabilities
Contingent consideration	28.8		24.7
Total liabilities	28.8		24.7
Recurring fair value measurements \| Balance \| Money market funds
Assets
Total assets	836.5		649.8
Recurring fair value measurements \| Balance \| Time deposits
Assets
Total assets	196.9		155.9
Recurring fair value measurements \| Balance \| U.S. government and agency securities
Assets
Total assets	2,686.7		2,473.3
Recurring fair value measurements \| Balance \| Corporate debt securities
Assets
Total assets	589.2		569.4
Recurring fair value measurements \| Balance \| Equity securities
Assets
Total assets	$ 18.6		$ 23.9