v3.25.2
Pension, Retiree Medical and Savings Plans (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 27, 2025
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]        
Pension strategy investment term, years   5 years    
Defined Contribution Plan, Cost   $ 411,000,000 $ 356,000,000 $ 283,000,000
amortization corridor   10.00%    
Defined Benefit Plan, Average Remaining Service Period of Active Plan Participants, Retiree Medical Expense   11 years    
Reporting Unit, Zero or Negative Carrying Amount, Number   0    
Domestic Plan        
Defined Benefit Plan Disclosure [Line Items]        
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax   $ 213,000,000   $ 318,000,000
Expected return on plan assets (a)   7.40% 7.40% 6.70%
Pre-tax non-cash settlement charge, net of tax, per share   $ 0.12   $ 0.18
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax   $ 165,000,000   $ 246,000,000
Defined Benefit Plan, Benefit Obligation, Divestiture       145,000,000
Defined Benefit Plan, Plan Assets, Amount   10,609,000,000 $ 11,541,000,000 $ 11,148,000,000
Domestic-Plan I [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax   $ 213,000,000    
Defined Benefit Plan, Average remaining life expectancy of Inactive Plan Participants, Pension Expense   26 years    
Pre-tax non-cash settlement charge, net of tax, per share   $ 0.12    
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax   $ 165,000,000    
Retiree Medical Plan        
Defined Benefit Plan Disclosure [Line Items]        
Expected return on plan assets (a)   7.10% 7.10% 5.70%
Defined Benefit Plan, Plan Assets, Amount   $ 163,000,000 $ 183,000,000 $ 196,000,000
Domestic plan -Plan H [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Average remaining service period of active plan participants, pension expense   11 years    
Forecast [Member] | Domestic Plan        
Defined Benefit Plan Disclosure [Line Items]        
Expected return on plan assets (a) 7.50%