Income taxes - Temporary Differences and Carryforwards (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Asset
Employee related obligations	$ 372	$ 586
Stock based compensation	717	686
R&D capitalized for tax	4,398	3,595
Reserves & liabilities	4,444	3,816
Inventory related	371	359
Operating loss carryforwards	2,298	2,145
Undistributed foreign earnings	1,931	1,801
Miscellaneous international	1,212	831
Miscellaneous U.S.	1,083
Income reported for tax purposes	16,826	13,819
Valuation allowances	(1,638)	(1,149)	$ (775)
Total deferred income taxes net of valuation allowances	15,188	12,670
Liability
Depreciation of property, plant and equipment	(833)	(902)
Goodwill and intangibles	(3,261)	(1,252)
Undistributed foreign earnings	(1,492)	(1,695)
Global intangible low-taxed income	(1,589)	(2,731)
Miscellaneous U.S.		(4)
Total deferred income taxes net of valuation allowances	$ (7,175)	$ (6,584)

Deferred tax assets international research and development capitalized.

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Deferred tax assets other domestic.

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Deferred Tax Assets, Undistributed Foreign Earnings

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Deferred Tax Liabilities, Other Domestic

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Deferred Tax Liability, Global Intangible Low-Taxed Income

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from employee benefits, classified as other.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences.

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