Income taxes - Summary of Activity Related to Unrecognized Tax Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 28, 2025 |
Dec. 29, 2024 |
Dec. 31, 2023 |
|
| Summary of unrecognized tax benefits | |||
| Beginning of year | $ 2,020 | $ 2,485 | $ 3,716 |
| Increases related to current year tax positions | 87 | 176 | 239 |
| Increases related to prior period tax positions | 925 | 129 | 244 |
| Decreases related to prior period tax positions | (160) | (147) | (781) |
| Settlements | (10) | (583) | (880) |
| Lapse of statute of limitations | (200) | (40) | (53) |
| End of year | $ 2,662 | $ 2,020 | $ 2,485 |
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|