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Pensions and Other Postretirement Benefit Plans (Schedule of Asset Allocation) (Details)
Dec. 31, 2017
Dec. 31, 2016
United States [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation 100.00%  
Percentage of plan assets at plan measurement date 100.00% 100.00%
United States [Member] | Common Stocks and Equity Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation  
Percentage of plan assets at plan measurement date 1.00% 2.00%
United States [Member] | Debt Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation 100.00%  
Percentage of plan assets at plan measurement date 95.00% 92.00%
United States [Member] | Real Estate [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation  
Percentage of plan assets at plan measurement date 4.00% 5.00%
United States [Member] | Other [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation [1]  
Percentage of plan assets at plan measurement date [1] 1.00%
Non-U.S. Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation 100.00%  
Percentage of plan assets at plan measurement date 100.00% 100.00%
Non-U.S. Pension Plans [Member] | Common Stocks and Equity Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation 32.00%  
Percentage of plan assets at plan measurement date 30.00% 33.00%
Non-U.S. Pension Plans [Member] | Debt Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation 64.00%  
Percentage of plan assets at plan measurement date 64.00% 61.00%
Non-U.S. Pension Plans [Member] | Real Estate [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation 1.00%  
Percentage of plan assets at plan measurement date 1.00%
Non-U.S. Pension Plans [Member] | Other [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Target Allocation [1] 3.00%  
Percentage of plan assets at plan measurement date [1] 5.00% 6.00%
[1] Other includes hedged equity and absolute return strategies, and private equity. The Company has procedures to closely monitor the performance of these investments and compares asset valuations to audited financial statements of the funds.