Employee Benefit Plans (Assets Held In Trust) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	$ 35.2	$ 33.4
Corporate-Owned Life Insurance Policies [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	34.9	32.7
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets held-in-trust	$ 0.3	$ 0.7