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Accumulated Other Comprehensive Income/(Losses) - Components of and Changes in Accumulated Other Comprehensive Income/(Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2026	Sep. 27, 2025	Sep. 26, 2026	Sep. 27, 2025
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Beginning balance			$ 41,664
Total other comprehensive income/(loss)			(156)
Ending balance	$ 35,975		35,975
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Beginning balance			(2,301)
OCI, before Reclassifications, Net of Tax, Attributable to Parent	5	$ (73)	(156)	$ 920
Total other comprehensive income/(loss)			(76)
Ending balance	(2,377)		(2,377)
Net Postemployment Benefit Plan Adjustments
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Beginning balance			(61)
OCI, before Reclassifications, Net of Tax, Attributable to Parent	(54)	(27)	(51)	(60)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	(3)	(3)	(44)	(3)
Total other comprehensive income/(loss)			(95)
Ending balance	(156)		(156)
Net Cash Flow Hedge Adjustments
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Beginning balance			(2)
OCI, before Reclassifications, Net of Tax, Attributable to Parent	0	11	9	117
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax			(2)	(1)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	1	5	6	(173)
Total other comprehensive income/(loss)			13
Ending balance	11		11
Net Fair Value Hedges
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Beginning balance			(6)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax	2	12	12	24
Amounts excluded from the effectiveness assessment of fair value hedges			12
Total other comprehensive income/(loss)			2
Ending balance	(4)		(4)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent
Accumulated Other Comprehensive Income/(Loss) [Line Items]
OCI, before Reclassifications, Net of Tax, Attributable to Parent	0	1
Accumulated Other Comprehensive Income/(Losses)
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Beginning balance			(2,370)
Ending balance	(2,526)		(2,526)
Net investment hedge adjustments
Accumulated Other Comprehensive Income/(Loss) [Line Items]
OCI, before Reclassifications, Net of Tax, Attributable to Parent	(17)	10	79	(289)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax	5	7	19	24
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	(6)	(6)	(18)	(25)
Accumulated Gain (Loss), Net, Fair Value Hedge, Parent
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	$ (1)	$ (2)	$ (10)	$ (3)