Derivative instruments - Effect of derivative instruments on statement of income (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 29, 2025	Mar. 30, 2024
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in AOCI	$ (4)
Gain (loss) reclassified from AOCI into income	(1)
Estimated amount of net deferred gains to be reclassified to interest expense in the future	1
Interest rate contracts
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in AOCI	(4)	$ 0
Gain (loss) reclassified from AOCI into income	1	0
Not designated as hedging instrument \| Commodity contracts \| Gain (loss) recognized in cost of goods sold
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income	1	0
Not designated as hedging instrument \| Commodity contracts \| Gain (loss) recognized in other income (expense), net
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income	0	0
Not designated as hedging instrument \| Foreign currency derivatives \| Gain (loss) recognized in cost of goods sold
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income	0	0
Not designated as hedging instrument \| Foreign currency derivatives \| Gain (loss) recognized in other income (expense), net
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income	$ 0	$ 0

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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-Name Accounting Standards Codification
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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Subparagraph (b)(1)
-Publisher FASB
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+ References

No definition available.

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- Definition

Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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