Income Taxes - Unrecognized Tax Benefts (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance		$ 20.2	$ 41.1	$ 38.7
Increase in prior year tax positions		0.0	0.2	0.2
Decrease in prior year tax positions		(1.0)	(6.6)	(3.1)
Increase in current year tax positions		2.0	0.7	4.4
Settlement	$ (25.3)		(12.2)
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation				0.9
Foreign currency remeasurement adjustment		0.0	(3.0)
Unrecognized tax benefits, ending balance		21.2	20.2	41.1
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Unrecognized tax benefits, interest and penalties, beginning balance		2.0	11.5	6.9
Increase in prior year tax positions		0.0	0.0	4.5
Decrease in prior year tax positions		(0.1)	(1.7)	(0.1)
Increase in current year tax positions		0.3	0.0	0.0
Settlement			(6.3)
Foreign currency remeasurement adjustment		0.0	(1.5)	0.2
Unrecognized tax benefits, interest and penalties, ending balance		$ 2.2	$ 2.0	$ 11.5

Reflects the effect on interest and penalties of adjustments of previously recorded tax expense, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including, but not limited to, tax assessment reversal, IRS tax settlement and unusual repatriation of foreign earnings.

No definition available.