Stock-Based Compensation - Employee Stock Option and Incentive Plan (Details) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2023 USD ($) $ / shares
Stock-Based Compensation
Weighted average grant-date fair value (in dollars per share) | $ / shares	$ 25.80	$ 28.38
Intrinsic value of options vested and expected to vest	$ 41.2	$ 41.2
Intrinsic value of options exercisable	32.6	32.6
Compensation cost not yet recognized	$ 67.6	$ 67.6
Weighted average period compensation cost is expected to be recognized (in years)		2 years 8 months 12 days