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Property, plant and equipment - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 29, 2024 | Dec. 31, 2023 | Jan. 01, 2023
Property, Plant and Equipment [Abstract] |  |  |
Interest expense capitalized | $ 79 | $ 70 | $ 49
Depreciation expense, including the amortization of capitalized interest | $ 2,800 | $ 2,600 | $ 2,400

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- Definition Amount of interest capitalized during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483013/835-20-50-1 + Details
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