Pension And Postretirement Benefits (Summary Of Benefit Obligations, Fair Value Of Plan Assets And Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Change in plan assets, Fair value of plan assets at beginning of year	$ 877.2
Change in plan assets, Fair value of plan assets at end of year	965.8	$ 877.2
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Change in benefit obligation Beginning of year	1,031.0	1,074.7
Change in benefit obligation, Service cost	5.4	5.9	$ 5.4
Change in benefit obligation, Interest cost	32.7	30.1	29.5
Change in benefit obligation, Plan participants' contributions	0.5	0.6
Change in benefit obligation at end of year	1,168.7	1,031.0	1,074.7
Change in plan assets, Fair value of plan assets at beginning of year	877.2	908.1
Change in plan assets, Actual return on plan assets	113.8	(47.6)
Change in plan assets, Foreign currency exchange impact	19.6	(25.4)
Change in plan assets, Employer contributions	4.2	57.5
Change in plan assets, Acquisition/transferred asset	(1.1)	(0.7)
Defined Benefit Plan, Plan Assets, Business Combination	0.0	34.9
Change in plan assets, Settlement	(0.7)	(2.1)
Defined Benefit Plan, Plan Assets, Benefits Paid	(47.7)	(48.1)
Change in plan assets, Fair value of plan assets at end of year	965.8	877.2	908.1
Change in plan assets, Funded status	(202.9)	(153.8)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0.5	4.4
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(131.3)	59.5
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	0.7	1.9
Defined Benefit Plan, Benefit Obligation, Benefits Paid	47.7	48.1
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	16.4	(23.3)
Defined Benefit Plan Acquisition Divestitures Curtailment Benefit Obligation	0.0	48.4
Defined Benefit Plan, Benefit Obligation, Admin Expenses	(0.7)	(0.3)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Change in benefit obligation Beginning of year	29.0	7.9
Change in benefit obligation, Service cost	0.3	0.3	0.0
Change in benefit obligation, Interest cost	1.1	1.1	0.2
Change in benefit obligation, Plan participants' contributions	0.1	0.3
Change in benefit obligation at end of year	29.0	29.0	7.9
Change in plan assets, Fair value of plan assets at beginning of year	0.0	0.0
Change in plan assets, Actual return on plan assets	0.0	0.0
Change in plan assets, Foreign currency exchange impact	0.0	0.0
Change in plan assets, Employer contributions	2.3	1.4
Change in plan assets, Acquisition/transferred asset	0.0	0.0
Defined Benefit Plan, Plan Assets, Business Combination	0.0	0.0
Change in plan assets, Settlement	0.0	0.0
Defined Benefit Plan, Plan Assets, Benefits Paid	(2.4)	(1.7)
Change in plan assets, Fair value of plan assets at end of year	0.0	0.0	$ 0.0
Change in plan assets, Funded status	(29.0)	(29.0)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0.0	(7.3)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(1.8)	3.0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Benefits Paid	2.4	2.6
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	(0.9)	0.0
Defined Benefit Plan Acquisition Divestitures Curtailment Benefit Obligation	0.0	32.3
Defined Benefit Plan, Benefit Obligation, Admin Expenses	$ 0.0	$ 0.0