Pension and Retiree Medical Benefits - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 15, 2024	Jun. 17, 2023	Jun. 15, 2024	Jun. 17, 2023
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	$ (9)	$ 6	$ (20)	$ 10
Domestic Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer			150	125
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	34	26	67	51
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0	0
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer			27	17
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	4	1	5	1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	$ (2)		$ (2)
Curtailment Gain		$ 0		$ 0