Income Taxes (as restated) - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Effective income tax rate	(28.60%)	(35.00%)	(18.40%)
Tax Cuts and Jobs Act, measurement period adjustment, income tax benefit			$ 14.1
Tax Cuts and Jobs Act, measurement period adjustment, income tax expense, transition tax			15.9
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability			12.1	$ 28.0
Undistributed earnings of foreign subsidiaries			78.2	$ 180.4
Tax Cuts And Jobs Act, measurement period adjustment, income tax expense, remeasurement of deferred tax assets and liabilities			1.4
Tax Cuts And Jobs Act, measurement period adjustment, income tax expense, change in valuation allowance			0.4
Deferred tax liability, foreign	$ 38.0	$ 45.1
Indemnification receivable for income taxes incurred prior to separation	15.7
Unrecognized tax benefits that would impact effective tax rate	56.4
Unrecognized tax benefits, amount that would be charged to other expense upon reversal of indemnification receivable	15.7
Unrecognized tax benefits, income tax penalties and interest accrued	12.4	$ 7.1	$ 6.2
Domestic Tax Authority
Income Tax Contingency [Line Items]
Operating loss carryforwards	318.8
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Operating loss carryforwards	594.9
Foreign Tax Authority
Income Tax Contingency [Line Items]
Operating loss carryforwards	281.9
Capital loss carryforwards	$ 71.2