Net Loss per Share - Reconciliation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net loss attributable to common stockholder—basic	$ (47.3)	$ (65.8)
Net loss attributable to common stockholders—diluted	$ (47.3)	$ (65.8)
Denominator:
Weighted average common shares outstanding—basic (in shares)	70,284,486	69,334,103
Weighted average common shares outstanding—diluted (in shares)	70,284,486	69,334,103
Net loss per share attributable to common stockholders—basic (usd per share)	$ (0.67)	$ (0.95)
Net loss per share attributable to common stockholders—diluted (usd per share)	$ (0.67)	$ (0.95)