Income Taxes - Domestic and Foreign Income Tax Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (15.2)	$ (19.7)		$ 9.9
Foreign	39.1	(2.3)		47.9
Income/(loss) from operations before income taxes	$ 23.9	$ (22.0)	[1]	$ 57.8

[1] As adjusted for the adoption of ASU 2020-06 using the full retrospective method.