Property, plant and equipment - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 28, 2025 |
Dec. 29, 2024 |
Dec. 31, 2023 |
|
| Property, Plant and Equipment [Abstract] | |||
| Interest expense capitalized | $ 114 | $ 79 | $ 70 |
| Depreciation expense, including the amortization of capitalized interest | $ 2,900 | $ 2,800 | $ 2,600 |