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Retirement Benefits (Weighted Average Actuarial Assumptions Used To Determine Benefit Obligations For The Plans) (Details)
Dec. 31, 2016
Dec. 31, 2015
U.S. Pension Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 4.42% 4.73%
Non U.S. Pension Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 2.54% 3.57%
Future compensation increase rate 0.46% 0.41%
Postretirement Health Care Benefits Plan    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 4.11% 4.26%