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Inventories (Tables)
 6 Months Ended
Jun. 30, 2023
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consist of the following (in millions):
June 30, 2023December 31, 2022
Aftermarket and refurbished products$2,133 $2,279 
Salvage and remanufactured products493 427 
Manufactured products55 46 
Total inventories $2,681 $2,752