Summary of Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant, and Equipment Schedule of Estimated Useful Lives [Table Text Block]

Depreciation is provided on the straight-line method at rates based upon the estimated useful lives of the various classes of depreciable assets. The lives used in computing for such assets are as follows:



Wholesale facilities and equipment	3	—	20	years
Buildings and improvements	3	—	30	years
Pipeline and related assets	3	—	20	years
Terminals and related assets	5	—	20	years
Asphalt plant, terminals and related assets	5	—	30	years
Service vehicles, computer systems and other assets	3	—	7	years