v3.25.2
SHARE-BASED COMPENSATION - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 27, 2025
Jun. 28, 2024
Jun. 27, 2025
Jun. 28, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based payment arrangement, expense $ 29 $ 27 $ 48 $ 53
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) 0.2 0.3 0.4 0.8