Stock-Based Compensation - Employee Stock Option (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Stock-Based Compensation
Weighted average period compensation cost is expected to be recognized (in years)	2 years 7 months 6 days
Stock Options
Stock-Based Compensation
Shares outstanding (in shares)	1,343,593
Vesting period (in years)	4 years
Expiration period (in years)	10 years
Intrinsic value of stock options exercised	$ 1.6	$ 17.2	$ 2.7
Weighted average grant-date fair value (in dollars per share)	$ 13.72	$ 26.21	$ 28.15
Fair value of stock options vested	$ 39.5	$ 32.4	$ 20.4
Intrinsic value of stock options outstanding	42.6
Intrinsic value of stock options vested and expected to vest	42.0
Intrinsic value of stock options exercisable	26.4
Compensation cost not yet recognized	$ 65.3
Stock Options | Principal Owner
Stock-Based Compensation
Expiration period (in years)	5 years
Exercise price as a percentage of fair market value	110.00%