v3.26.1
Pension and Retiree Medical Benefits - Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 21, 2026
Mar. 22, 2025
Domestic Plan    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Service Cost $ 54 $ 72
Defined Benefit Plan, Interest Cost 120 135
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (191) (186)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 2 1
Defined Benefit Plan, Amortization of Gain (Loss) 17 19
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits 1  
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits   16
Defined Benefit Plan, Other Cost (Credit) (51) (15)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 3 57
Foreign Plan    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Service Cost 10 8
Defined Benefit Plan, Interest Cost 28 26
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (39) (36)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 0 0
Defined Benefit Plan, Amortization of Gain (Loss) 6 4
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits 0 0
Defined Benefit Plan, Other Cost (Credit) (5) (6)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 5 2
Retiree Medical Plan    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Service Cost 8 7
Defined Benefit Plan, Interest Cost 6 7
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (2) (2)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (1) (1)
Defined Benefit Plan, Amortization of Gain (Loss) (5) (6)
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits 0 0
Defined Benefit Plan, Other Cost (Credit) (2) (2)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total $ 6 $ 5