Income Taxes (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
U.S. federal statutory tax rate	21000000.00%	21000000.00%	21000000.00%
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 0.2
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	1.5
Retained earnings	1,195.6	$ 1,200.0
Gross deferred tax assets	61.0	59.3
Gross deferred tax liabilities	216.4	187.6
Unrecognized Tax Benefits	1.2	$ 1.4
Deferred Tax Assets, Valuation Allowance, Operating Loss Carryforward
Revenues from External Customers and Long-Lived Assets [Line Items]
Deferred Tax Assets, Valuation Allowance	0.6
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Retained earnings	$ 25.1