Employee Benefit Plans (Assets Held In Trust) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	$ 37.3	$ 37.0
Corporate-owned life insurance policies
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	36.0	35.8
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	$ 1.3	$ 1.2