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Summary of Significant Accounting Policies (Useful Life of Property, Plant and Equipment) (Details)
12 Months Ended
Dec. 31, 2017
Minimum [Member] | Buildings and Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 15 years
Minimum [Member] | Leasehold Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 6 years
Minimum [Member] | Machinery and Equipment [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 3 years
Minimum [Member] | Software [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 3 years
Maximum [Member] | Buildings and Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 40 years
Maximum [Member] | Leasehold Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 10 years
Maximum [Member] | Machinery and Equipment [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 7 years
Maximum [Member] | Software [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful life 7 years