Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Accrued expenses	$ 0.3	$ 4.7
Compensation	28.8	32.3
Deferred revenue	0.0	13.9
Disallowed interest carryforward	9.3	5.0
Net operating loss carryforwards	23.5	31.1
Foreign tax and other tax credit carryforwards	21.4	16.4
Unrealized currency gain/loss	6.8	9.6
Hedge unrealized FX gain/loss	12.5
Lease obligations	14.1	15.2
Other	2.4
Gross deferred tax assets	119.1	128.2
Less valuation allowance	(7.1)	(6.6)	$ (4.2)	$ (4.3)
Total deferred tax assets	112.0	121.6
Deferred tax liabilities:
Accounts receivable	0.0	2.7
Inventory	3.6	10.8
Fixed assets	6.1	10.4
Foreign patent reserves	4.4	2.4
Intangibles	32.6	40.2
Accrued expenses	0.5	2.8
Accrued withholding tax	6.7	6.7
Right of use asset	14.0	14.9
Other	0.2	2.2
Total deferred tax liabilities	68.1	93.1
Net deferred tax assets	$ 43.9	$ 28.5