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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Summary of Property, Plant and Equipment
Depreciation is provided on a straight-line basis over the estimated useful lives of the assets described below (in years). The Company periodically reviews the estimated useful lives of its PP&E and, where appropriate, changes are made prospectively.
Land improvements25
Buildings and building improvements
25 – 40
Machinery and equipment
3– 18
20202019
Buildings and improvements$1,419 $1,402 
Machinery and equipment6,166 5,836 
Land and improvements307 298 
Construction in progress514 276 
8,406 7,812 
Less: accumulated depreciation and amortization(4,208)(3,925)
$4,198 $3,887