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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Stock-based compensation cost included in income from continuing operations The following table presents total stock-based compensation cost included in income from continuing operations.
Three Months Ended September 30,Nine Months Ended September 30,
(Dollars in millions)2024202320242023
Cost$56 $48 $165 $141 
Selling, general and administrative167 148 511 465 
Research, development and engineering107 91 290 237 
Pre-tax stock-based compensation cost$330 $286 $966 $843 
Income tax benefits(131)(74)(353)(216)
Total net stock-based compensation cost$199 $213 $613 $627