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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2023
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)2023202220232022
Cost$48 $40 $141 $124 
Selling, general and administrative148 138 465 427 
Research, development and engineering91 73 237 188 
Pre-tax stock-based compensation cost$286 $251 $843 $739 
Income tax benefits(74)(51)(216)(191)
Total net stock-based compensation cost$213 $200 $627 $548