Pension, Retiree Medical and Savings Plans (Components of Benefit Expense) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021
Domestic Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 327	$ 487	$ 518
Interest cost	593	434	324
Expected return on plan assets	(851)	(912)	(970)
Amortization of prior service credits	(26)	(28)	(31)
Amortization of net losses/(gains)	70	149	224
Settlement/curtailment losses/(gains) (a)	4	322	40
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits	(1)
Special termination benefits		37	9
Defined Benefit Plan, Other Cost (Credit)	(211)	2	(404)
Total	116	$ 489	114
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
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		318
International
Defined Benefit Plan Disclosure [Line Items]
Service cost	43	64	104
Interest cost	141	90	74
Expected return on plan assets	(192)	(218)	(231)
Amortization of prior service credits	(1)	(1)	(2)
Amortization of net losses/(gains)	13	29	77
Settlement/curtailment losses/(gains) (a)	10	1	(11)
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits	0	0
Special termination benefits	0	0	0
Defined Benefit Plan, Other Cost (Credit)	(29)	(99)	(93)
Total	14	(35)	11
Retiree Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	29	37	33
Interest cost	36	19	15
Expected return on plan assets	(13)	(16)	(15)
Amortization of prior service credits	(6)	(8)	(11)
Amortization of net losses/(gains)	(27)	(14)	(14)
Settlement/curtailment losses/(gains) (a)	0	(16)	0
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits	0	0
Special termination benefits	0	0	0
Defined Benefit Plan, Other Cost (Credit)	(10)	(35)	(25)
Total	$ 19	$ 2	$ 8