Employee Benefit Plans (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans [Roll Forward]
Amortization	$ 2.9	$ 2.6	$ 4.6
Net loss (gain) (before tax)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans [Roll Forward]
Accumulated other comprehensive income (net of tax), Beginning Balance	54.7
Amortization	(2.9)
Net Actuarial loss	18.3
Foreign currency exchange rates change	0.3
Income tax change	(0.2)
Accumulated other comprehensive income (net of tax), Ending Balance	70.2	54.7
Deferred income taxes
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans [Roll Forward]
Deferred income taxes, beginning balance	(15.4)
Amortization	0.0
Net Actuarial loss	0.0
Foreign currency exchange rates change	0.0
Income tax change	(3.6)
Deferred income taxes, ending balance	(19.0)	(15.4)
Accumulated other comprehensive income (loss) (net of tax)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans [Roll Forward]
Accumulated other comprehensive income (net of tax), beginning balance	39.3
Amortization	(2.9)
Net Actuarial loss	18.3
Foreign currency exchange rates change	0.3
Income tax change	(3.8)
Accumulated other comprehensive income (net of tax), ending balance	$ 51.2	$ 39.3