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Pensions - Changes In Plan Assets Using Unobservable Inputs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2025
Dec. 29, 2024
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at fair value—beginning of fiscal year $ 526 $ 535
Effect of exchange rates 48 (23)
Plan assets at fair value—end of fiscal year 572 526
Buy-in annuity policies    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at fair value—end of fiscal year 256  
Other Assets    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at fair value—beginning of fiscal year 195  
Plan assets at fair value—end of fiscal year 255 195
Significant Unobservable Inputs (Level 3)    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at fair value—beginning of fiscal year 151  
Plan assets at fair value—end of fiscal year 431 151
Significant Unobservable Inputs (Level 3) | Buy-in annuity policies    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at fair value—beginning of fiscal year 0  
Net realized and unrealized gains 0  
Net purchases, issuances, and settlements 250  
Effect of exchange rates 6  
Plan assets at fair value—end of fiscal year 256 0
Significant Unobservable Inputs (Level 3) | Other Assets    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Plan assets at fair value—beginning of fiscal year 151  
Net realized and unrealized gains 9  
Net purchases, issuances, and settlements (7)  
Effect of exchange rates 22  
Plan assets at fair value—end of fiscal year $ 175 $ 151