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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Weighted-Average Useful Lives Of Structures and Machinery and Equipment The following table details the weighted-average useful lives of structures and machinery and equipment by reporting segment (numbers in years):
StructuresMachinery and equipment
   Engine Products3017
   Fastening Systems2717
   Engineered Structures2819
   Forged Wheels2918
Properties, Plants, and Equipment, Net
December 31, 2021December 31, 2020
Land and land rights$91 $98 
Structures1,034 1,033 
Machinery and equipment3,932 3,879 
5,057 5,010 
Less: accumulated depreciation and amortization2,772 2,626 
2,285 2,384 
Construction work-in-progress182 208 
Properties, plants, and equipment, net$2,467 $2,592 
Weighted-Average Useful Lives of Software and Other Intangibles The following table details the weighted-average useful lives of software and other intangible assets by reporting segment (numbers in years):
SoftwareOther intangible assets
   Engine Products934
   Fastening Systems623
   Engineered Structures410
   Forged Wheels424