Income Taxes - Loss Before Income Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
United States	$ (122.8)	$ (170.3)	$ (208.5)
Foreign	(38.1)	(33.6)	(21.3)
Loss before income taxes	$ (160.9)	$ (203.9)	$ (229.8)