Employee Benefit Plans (Assets Held In Trust) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	$ 37.0	$ 37.1
Corporate-owned life insurance policies
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	35.8	36.0
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	$ 1.2	$ 1.1