v3.25.4
Income taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 28, 2025
Dec. 28, 2025
Dec. 29, 2024
Dec. 31, 2023
Jan. 01, 2023
Tax Credit Carryforward [Line Items]          
Effective income tax rate reconciliation, increase (decrease), percent   2.00% 4.20%    
Increase (Decrease) in Deferred Income Taxes $ 1,000        
Effective Rate   17.70% 15.70% 11.50%  
Unrecognized tax benefits 2,662 $ 2,662 $ 2,020 $ 2,485 $ 3,716
Unrecognized tax benefits, interest on income tax expense   64 217 $ 99  
Unrecognized tax benefits, interest on income taxes accrued $ 336 336 274    
Effective income tax rate reconciliation, tax settlement, percent       22.00%  
Talc          
Tax Credit Carryforward [Line Items]          
Reversal of fee expense   $ 7,000      
Effective Rate   22.00%      
Consumer Health | Talc          
Tax Credit Carryforward [Line Items]          
Reversal of fee expense   $ 7,000      
Litigation expense     $ 5,100 $ 7,000