Income Taxes - Schedule of Loss Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
United States	$ (314.1)	$ (610.4)	$ (496.5)
International	(7.6)	8.0	(0.1)
Total	$ (321.7)	$ (602.4)	$ (496.6)

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details