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Pension Plans and Other Benefits - Other Disclosures (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
Defined Benefit Plan Disclosure  
The amount of cash contribution to the defined benefit postretirement medical plans needed next fiscal year to meet minimum funding requirements $ 4.2
Minimum  
Defined Benefit Plan Disclosure  
The amount of estimated cash contribution to the defined benefit pension plans needed next fiscal year to meet minimum funding requirements $ 4.4
Fixed Income Securities | Foreign Hourly Plans [Member]  
Defined Benefit Plan Disclosure  
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 60.00%
Fixed Income Securities | United States  
Defined Benefit Plan Disclosure  
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 80.00%
Fixed Income Securities | Foreign Salaried Plans [Member]  
Defined Benefit Plan Disclosure  
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 80.00%
Return Seeking Investments | Foreign Hourly Plans [Member]  
Defined Benefit Plan Disclosure  
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 40.00%
Return Seeking Investments | United States  
Defined Benefit Plan Disclosure  
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 20.00%
Return Seeking Investments | Foreign Salaried Plans [Member]  
Defined Benefit Plan Disclosure  
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 20.00%