Derivative instruments - Effect Of Derivative Instruments On Statement Of Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Commodity contracts | Gain (loss) recognized in cost of goods sold
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income	$ (1)	$ (7)	$ (1)	$ (13)
Commodity contracts | Gain (loss) recognized in other income (expense), net
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income	0	0	0	0
Foreign currency derivatives | Gain (loss) recognized in cost of goods sold
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income	(2)	(1)	(2)	1
Foreign currency derivatives | Gain (loss) recognized in other income (expense), net
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income	$ 0	$ 0	$ 0	$ 0