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Net Property (Notes)
 12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block] NET PROPERTY
Net property is reported at cost, net of accumulated depreciation, which includes impairments.  We capitalize new assets when we expect to use the asset for more than one year.  Routine maintenance and repair costs are expensed when incurred.

Property and equipment are depreciated primarily using the straight-line method over the estimated useful life of the asset.  Useful lives range from 3 years to 40 years.  The estimated useful lives generally are 14.5 years for machinery and equipment, 8 years for software, 30 years for land improvements, and 40 years for buildings.  Tooling generally is amortized over the expected life of a product program using a straight-line method.  

Net property at December 31 was as follows (in millions):
20232024
Land$367 $360 
Buildings and land improvements12,636 13,912 
Machinery, equipment, and other41,202 40,765 
Software5,423 5,694 
Construction in progress5,308 6,240 
Total land, plant and equipment, and other64,936 66,971 
Accumulated depreciation(33,679)(33,525)
Net land, plant and equipment, and other31,257 33,446 
Tooling, net of amortization9,564 8,482 
Total$40,821 $41,928 

Property-related expenses, excluding net investment in operating leases, for the years ended December 31 were as follows (in millions):
 202220232024
Depreciation and other amortization$2,878 $3,041 $3,067 
Tooling amortization 2,556 2,340 2,018 
Total (a)$5,434 $5,381 $5,085 
Maintenance and rearrangement$2,083 $1,909 $1,919 
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(a)    Includes impairment of held-for-sale long-lived assets.  See Note 21 for additional information.