Income Taxes and Uncertain Income Tax Positions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Defered Tax Liabilties, Net	$ 5.8		$ 5.8		$ 5.9
Unrecognized Tax Benefits	24.0		24.0
Unrecognized Tax Benefits, Income Tax Penalties Accrued	3.5		3.5		3.9
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	3.3		3.3		$ 3.0
Unrecognized Tax Benefits, Income Tax Penalties Expense	(0.1)	$ 0.1	0.2	$ 0.5
Unrecognized Tax Benefits, Interest on Income Taxes Expense	$ 0.2	$ 0.2	0.4	0.4
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations			$ 1.2	$ 1.9