Quarterly report [Sections 13 or 15(d)]

TRANSFORMATION STRATEGY COSTS - Narrative (Details)

v3.25.1
TRANSFORMATION STRATEGY COSTS - Narrative (Details)
position in Thousands, hour in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
position
hour
lease
Mar. 31, 2024
USD ($)
Dec. 31, 2023
position
Dec. 31, 2024
USD ($)
Restructuring Cost and Reserve [Line Items]        
Restructuring and related activities, term (less than) 1 year      
Transformation cost $ 58 $ 46    
Transformation 2.0        
Restructuring Cost and Reserve [Line Items]        
Cost incurred to date 814      
Expected costs remaining 75      
Payments for restructuring 33      
Transformation cost 16 21    
Fit to Serve        
Restructuring Cost and Reserve [Line Items]        
Cost incurred to date 435      
Expected costs remaining 25      
Expected number of positions eliminated | position     14  
Separation costs 28     $ 45
Transformation cost $ 19 25    
Network Reconfiguration and Efficiency Reimagined        
Restructuring Cost and Reserve [Line Items]        
Expected number of positions eliminated | position 20      
Transformation cost $ 23 $ 0    
Expected reduction in workforce hours | hour 25      
Expected number of buildings to be closed | lease 73      
Expected cost savings $ 3,500      
Costs saved 500      
Cost incurred to date 23      
Network Reconfiguration and Efficiency Reimagined | Minimum        
Restructuring Cost and Reserve [Line Items]        
Expected costs remaining 400      
Network Reconfiguration and Efficiency Reimagined | Maximum        
Restructuring Cost and Reserve [Line Items]        
Expected costs remaining $ 600