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Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2025
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.
(Dollars in millions)
For the three months ended March 31:20252024
Cost$65 $56 
Selling, general and administrative217 171 
Research and development119 93 
Pre-tax stock-based compensation cost$401 $320 
Income tax benefits(194)(120)
Total net stock-based compensation cost$207 $200