Pension And Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Qualifying employees receive additional contribution, percentage	3.00%
Percentage of non-matching contribution to participants	3.00%
postretirementgainpretax	$ 0.2
gaap_PostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent	7.8	$ 8.1
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net gain/loss that will be amortized from accumulated other comprehensive income into net periodic benefit cost	14.2
Estimated net gain/loss that will be amortized from accumulated other compreshensive income into net peridoic benefit cost, prior service cost	0.6
Expected cash contribution based on current actuarial calculations in 2012	25.0
Defined benefit plans contribution by the company	$ 12.7	$ 8.3
Non-U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	6.45%
Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	47.00%	47.00%
Target plan asset allocation range minimum	35.00%
Target plan asset allocation range maximum	75.00%
Equity securities [Member] | Non-U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	35.00%
Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	23.00%	23.00%
Target plan asset allocation range minimum	20.00%
Target plan asset allocation range maximum	50.00%
Fixed income securities [Member] | Non-U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage		30.00%
Alternative assets/Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	29.00%	28.00%
Target plan asset allocation range minimum	0.00%
Target plan asset allocation range maximum	35.00%
Alternative assets/Other [Member] | Non-U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage		34.00%
Money market [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	1.00%	2.00%
Target plan asset allocation range minimum	0.00%
Target plan asset allocation range maximum	10.00%
Cash and cash equivalents [Member] | Non-U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage		1.00%
Common Stock [Member] | Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	6.00%	5.00%
Savings And Investment Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans contribution by the company	$ 8.5	$ 8.0	$ 7.9
2% Non-Matching Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans contribution by the company	$ 11.0	$ 10.7	$ 8.7
%ofemployeesinUSplans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan employees, percentage	17.00%
% of employees in Non-US plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan employees, percentage	12.00%
U.S. [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	7.75%
U.S. [Member] | Equity securities [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	61.00%
U.S. [Member] | Equity securities [Member] | Minimum [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	25.00%
U.S. [Member] | Equity securities [Member] | Maximum [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	75.00%
U.S. [Member] | Fixed income securities [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	15.00%
U.S. [Member] | Fixed income securities [Member] | Minimum [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	15.00%
U.S. [Member] | Alternative assets/Other [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	22.00%
U.S. [Member] | Alternative assets/Other [Member] | Minimum [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	10.00%
U.S. [Member] | Alternative assets/Other [Member] | Maximum [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	35.00%
U.S. [Member] | Cash [Member] | Minimum [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	0.00%
U.S. [Member] | Cash [Member] | Maximum [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	10.00%
U.S. [Member] | Cash and cash equivalents [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation, percentage	2.00%
North America [Member] | Fixed income securities [Member] | Maximum [Member] | U.S. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on assets assumption reflected as a long-term asset allocation	35.00%