Annual report pursuant to Section 13 and 15(d)

Summary of Business and Significant Accounting Principles - Estimated Useful Lives (Details)

v3.20.4
Summary of Business and Significant Accounting Principles - Estimated Useful Lives (Details)
12 Months Ended
Dec. 31, 2020
Buildings and improvements | Minimum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, useful life 15 years
Buildings and improvements | Maximum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, useful life 39 years
Land improvements  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, useful life 15 years
Equipment and vehicles | Minimum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, useful life 3 years
Equipment and vehicles | Maximum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, useful life 6 years
Tooling  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, useful life 5 years