v3.25.2
Pension, Retiree Medical and Savings Plans (Selected Financial Information for Pension and Retiree Medical Plans) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Pension Plans, Defined Benefit      
Change in fair value of plan assets      
Employer contributions/funding $ 295 $ 364 $ 336
Retiree Medical Plan      
Change in projected benefit obligation      
Obligation at beginning of year 677 714  
Service cost 31 29 37
Interest cost 32 36 19
Plan amendments 0 0  
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant 0 0  
Experience (gain)/loss (44) (22)  
Settlement/curtailment 0 0  
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits (1) 0  
Other, including foreign currency adjustment (3) 0  
Obligation at end of year 616 677 714
Defined Benefit Plan, Benefit Obligation, Benefits Paid (78) (80)  
Change in fair value of plan assets      
Fair value at beginning of year 183 196  
Actual return on plan assets 5 21  
Employer contributions/funding 53 46 48
Participant contributions 0 0  
Defined Benefit Plan, Plan Assets, Benefits Paid (78) (80)  
Defined Benefit Plan, Plan Assets, Payment for Settlement 0 0  
Other, including foreign currency adjustment 0 0  
Fair value at end of year 163 183 196
Funded status (453) (494)  
Amounts recognized      
Other assets 0 0  
Other current liabilities (52) (52)  
Other liabilities (401) (442)  
Net amount recognized (453) (494)  
Amounts included in accumulated other comprehensive loss (pre-tax)      
Net loss/(gain) (333) (323)  
Prior service cost/(credit) (14) (19)  
Total (347) (342)  
Changes recognized in net loss/(gain) included in other comprehensive loss      
Net loss/(gain) arising in current year (36) (30)  
Amortization and settlement recognition 25 27  
Foreign currency translation (gain)/loss 1 0  
Total (10) (3)  
Domestic Plan      
Change in projected benefit obligation      
Obligation at beginning of year 12,035 11,543  
Service cost 347 327 487
Interest cost 585 593 434
Plan amendments 12 13  
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant 0 0  
Experience (gain)/loss (563) 603  
Settlement/curtailment (506) (36)  
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits 31 (1)  
Other, including foreign currency adjustment 0 (1)  
Obligation at end of year 11,324 12,035 11,543
Defined Benefit Plan, Benefit Obligation, Benefits Paid (617) (1,006)  
Change in fair value of plan assets      
Fair value at beginning of year 11,541 11,148  
Actual return on plan assets (10) 1,121  
Employer contributions/funding 236 314  
Participant contributions 0 0  
Defined Benefit Plan, Plan Assets, Benefits Paid (617) (1,006)  
Defined Benefit Plan, Plan Assets, Payment for Settlement (539) (36)  
Other, including foreign currency adjustment (2) 0  
Fair value at end of year 10,609 11,541 11,148
Funded status (715) (494)  
Amounts recognized      
Other assets 388 313  
Other current liabilities (85) (75)  
Other liabilities (1,018) (732)  
Net amount recognized (715) (494)  
Amounts included in accumulated other comprehensive loss (pre-tax)      
Net loss/(gain) 3,618 3,596  
Prior service cost/(credit) 54 18  
Total 3,672 3,614  
Changes recognized in net loss/(gain) included in other comprehensive loss      
Net loss/(gain) arising in current year 320 333  
Amortization and settlement recognition (298) (74)  
Foreign currency translation (gain)/loss 0 0  
Total 22 259  
Accumulated benefit obligation at end of year 11,069 11,653  
Foreign Plan [Member]      
Change in projected benefit obligation      
Obligation at beginning of year 2,986 2,603  
Service cost 46 43 64
Interest cost 144 141 90
Plan amendments 1 0  
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant 2 2  
Experience (gain)/loss (55) 194  
Settlement/curtailment (62) (26)  
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits 0 0  
Other, including foreign currency adjustment (168) 145  
Obligation at end of year 2,786 2,986 2,603
Defined Benefit Plan, Benefit Obligation, Benefits Paid (108) (116)  
Change in fair value of plan assets      
Fair value at beginning of year 3,528 3,195  
Actual return on plan assets 142 267  
Employer contributions/funding 59 50  
Participant contributions 2 2  
Defined Benefit Plan, Plan Assets, Benefits Paid (108) (116)  
Defined Benefit Plan, Plan Assets, Payment for Settlement (62) (26)  
Other, including foreign currency adjustment (164) 156  
Fair value at end of year 3,397 3,528 $ 3,195
Funded status 611 542  
Amounts recognized      
Other assets 792 727  
Other current liabilities (10) (11)  
Other liabilities (171) (174)  
Net amount recognized 611 542  
Amounts included in accumulated other comprehensive loss (pre-tax)      
Net loss/(gain) 633 707  
Prior service cost/(credit) (5) (8)  
Total 628 699  
Changes recognized in net loss/(gain) included in other comprehensive loss      
Net loss/(gain) arising in current year 8 119  
Amortization and settlement recognition (43) (23)  
Foreign currency translation (gain)/loss (39) 40  
Total (74) 136  
Accumulated benefit obligation at end of year $ 2,638 $ 2,835