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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 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 June 30,Six Months Ended June 30,
(Dollars in millions)2024202320242023
Cost$53 $47 $109 $93 
Selling, general and administrative172 168 343 317 
Research, development and engineering90 73 183 146 
Pre-tax stock-based compensation cost$316 $288 $636 $556 
Income tax benefits(101)(75)(222)(142)
Total net stock-based compensation cost$214 $213 $414 $414