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Stock Compensation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Jan. 31, 2024
Stock compensation
Stock compensation expense	$ 61.0	$ 59.8
Dividend yield (as percent)	0.00%
Assumed annualized forfeiture rate (as a percent)	5.00%
Share-based Payment Arrangement, Option
Stock compensation
Stock option grant term (in years)	10 years
Vesting period (in years)	4 years
Percentage of units vesting at the end of each calendar year (as a percent)	25.00%
Unrecognized compensation cost for nonvested option (in dollars)	$ 22.2
Vesting period of recognition of the unrecognized compensation cost of nonvested awards (in years)	1 year 1 month 6 days
Share-based Payment Arrangement, Option \| Share-based Payment Arrangement, Tranche One
Stock compensation
Vesting period (in years)	1 year
Share-based Payment Arrangement, Option \| Share-based Payment Arrangement, Tranche Two
Stock compensation
Vesting period (in years)	36 months
Restricted Stock Units (RSUs)
Stock compensation
Vesting period (in years)	4 years
Percentage of units vesting at the end of each calendar year (as a percent)	25.00%
Number of shares awarded for each RSU (in shares)	1
Unrecognized compensation cost for nonvested option (in dollars)	$ 209.7
Vesting period of recognition of the unrecognized compensation cost of nonvested awards (in years)	1 year 6 months
Performance Shares
Stock compensation
Stock compensation expense	$ 3.1	3.4
Unrecognized compensation cost for nonvested option (in dollars)	$ 13.7
Vesting period of recognition of the unrecognized compensation cost of nonvested awards (in years)	1 year 4 months 24 days
Performance Shares \| Minimum
Stock compensation
Vesting period (in years)	3 years
Performance Shares \| Maximum
Stock compensation
Vesting period (in years)	4 years
Research and Development Expense
Stock compensation
Stock compensation expense	$ 36.7	36.8
Selling, General and Administrative Expenses
Stock compensation
Stock compensation expense	23.4	22.4
Cost of Sales
Stock compensation
Stock compensation expense	$ 0.9	$ 0.6
2024 Inducement Plan
Stock compensation
Shares reserved for future issuance (in shares)			1,000,000