Pension, Retiree Medical and Savings Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Defined Benefit Plan Disclosure [Line Items]
Pension strategy investment term, years		5 years
Defined Contribution Plan, Cost		$ 283	$ 246	$ 225
amortization corridor		10.00%
Defined Benefit Plan, Average Remaining Service Period of Active Plan Participants, Retiree Medical Expense		9 years
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		$ 318
Expected return on plan assets (a)		6.70%	6.40%	6.80%
Pre-tax non-cash settlement charge, net of tax, per share		$ 0.18
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax		$ 246
Pension Cost (Reversal of Cost)			$ 70
Defined Benefit Plan, Benefit Obligation, Divestiture		$ 145
Domestic - Plan A [Member]
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period of active plan participants, pension expense		9 years
Domestic-Plan I [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Average remaining life expectancy of Inactive Plan Participants, Pension Expense		27 years
Retiree Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets (a)		5.70%	5.40%	5.80%
Domestic plan -Plan H [Member]
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period of active plan participants, pension expense		11 years
Pension Cost (Reversal of Cost)			$ 45
Defined benefit plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pre-tax non-cash settlement charge, net of tax, per share				$ 0.11
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax				$ 158
Forecast [Member] | Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets (a)	7.40%
Forecast [Member] | Domestic-Plan I [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Average remaining life expectancy of Inactive Plan Participants, Pension Expense	26 years
Forecast [Member] | Domestic plan -Plan H [Member]
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period of active plan participants, pension expense	11 years