Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	17.50%	12.10%	18.10%
Income taxes paid	$ 161.7	$ 110.7	$ 88.0
Income tax ruling exemption	21.4	14.2	13.7
Net operating loss carryforwards in certain state and international jurisdictions	32.9
Unrecognized tax benefits that would impact effective tax rate if recognized	22.2	21.8
Interest expense and penalties related to unrecognized tax benefits	1.1	1.3	1.8
Interest expense and penalties accrued	$ 3.8	$ 3.6	$ 3.6