Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Property, plant and equipment [Table Text Block]

Depreciation is computed for financial reporting purposes by the straight-line method for land improvements, building and leasehold improvements and by the declining-balance method for equipment, based on the estimated useful lives of the assets, as follows:

Land improvements	5 to 20 years
Buildings	5 to 30 years
Equipment	3 to 20 years
Leasehold improvements	Shorter of lease term or estimated useful life; ranging from 5-to-20 years