v3.25.3
SHARE-BASED COMPENSATION - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Oct. 03, 2025
Sep. 27, 2024
Oct. 03, 2025
Sep. 27, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based payment arrangement, expense $ 35 $ 23 $ 83 $ 76
L3Harris Shareholder-approved Employee Stock Incentive Plans        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock issued, net of shares withheld for tax purposes (in shares) 0.7 0.4 1.1 1.2