Business, Product and Geographical Area Information - Schedule of Income Taxes Paid by Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Taxes Paid By Geographical Area [Line Items]
Income taxes paid	$ 0.2	$ 0.1	$ 2.0	$ 0.5
Domestic
Income Taxes Paid By Geographical Area [Line Items]
Income taxes paid	0.0	0.1	1.2	0.4
Foreign
Income Taxes Paid By Geographical Area [Line Items]
Income taxes paid	$ 0.2	$ 0.0	$ 0.8	$ 0.1