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2024 Transformation Initiative (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2026
Dec. 31, 2023
Restructuring Cost and Reserve        
Income Tax Expense (Benefit) $ (184) $ (173)    
2024 Transformation Initiative        
Restructuring Cost and Reserve        
Income Tax Expense (Benefit) (11)      
Restructuring Reserve 34     $ 0
Payments for Restructuring 11      
Payments for Restructuring (11)      
2024 Transformation Initiative | Maximum | Scenario, Forecast        
Restructuring Cost and Reserve        
Expected Number of Positions Eliminated     5.00%  
Expected Number of Positions Eliminated     5.00%  
2024 Transformation Initiative | Minimum | Scenario, Forecast        
Restructuring Cost and Reserve        
Expected Number of Positions Eliminated     4.00%  
Expected Number of Positions Eliminated     4.00%  
2024 Transformation Initiative | Workforce Reductions and Other Cash Exit Costs        
Restructuring Cost and Reserve        
Restructuring Charges 45      
2024 Transformation Initiative | Before Tax | Scenario, Forecast        
Restructuring Cost and Reserve        
Restructuring and Related Cost, Expected Cost     $ 1,500  
Restructuring and Related Cost, Expected Cost     $ 1,500  
2024 Transformation Initiative | Before Tax | Marketing, Research and General Expenses        
Restructuring Cost and Reserve        
Charges (adjustments) for workforce reductions 23      
Other exit costs 22      
Restructuring Charges 45      
2024 Transformation Initiative | After Tax | Kimberly-Clark Corporation        
Restructuring Cost and Reserve        
Restructuring Charges $ 34