Employee Benefit Plans (Assets Held In Trust) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	$ 33.7	$ 37.3
Corporate-owned life insurance policies
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	28.5	36.0
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	$ 5.2	$ 1.3