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Pension and Other Post-Retirement Benefit Plans (Weighted-Average Assumptions Used Benefit Obligations) (Details)
Dec. 31, 2018
Dec. 31, 2017
Pensions | U.S.    
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]    
Discount rate 4.40% 3.70%
Pensions | International    
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]    
Discount rate 2.54% 2.42%
Rate of compensation increase 2.24% 2.37%
Other Post-retirement Benefits    
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]    
Discount rate 5.04% 4.33%
Rate of compensation increase 4.00% 4.00%