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Inventory (Unaudited) (Tables)
9 Months Ended
Sep. 30, 2026
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
$ in millionsSeptember 30, 2026December 31, 2025
Raw materials$308 $306 
Work in process979 945 
Finished goods74 58 
Inventoried costs, net$1,361 $1,309