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Kenvue separation and discontinued operations - Details (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 23, 2023 | May 08, 2023 | Dec. 31, 2023 | Jan. 01, 2023 | Jan. 02, 2022 | Jul. 02, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Common stock, par value per share (in usd per share) |  |  | $ 1.00 | $ 1.00 |  |
Proceeds from Kenvue initial public offering |  |  | $ 4,241 | $ 0 | $ 0 |
Realized gain (loss) on investment |  | $ 2,500 |  |  |  |
Common stock received in exchange offer | $ 31,400 |  |  |  |  |
Net assets divested |  |  | 0 | 27,237 |  |
Accumulated other comprehensive loss |  |  | 12,527 | 12,967 |  |
Transition service agreement, term | 24 months |  |  |  |  |
Separation costs incurred |  |  | 986 | 1,089 | $ 67 |
Incremental tax cost |  |  |  | $ 500 |  |
Minimum |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Transition manufacturing agreement, term | 3 months |  |  |  |  |
Maximum |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Transition manufacturing agreement, term | 5 years |  |  |  |  |
Consumer Health Business |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Net assets divested | $ 11,600 |  |  |  |  |
Accumulated other comprehensive loss | 4,300 |  |  |  |  |
Decrease in noncontrolling interest | 1,200 |  |  |  |  |
Noncash gain on exchange offer | $ 21,000 |  |  |  |  |
Kenvue Inc. |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Split-off percentage | 80.10% |  |  |  |  |
Kenvue Inc. |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Stock issued in exchange offer (in shares) | 190,955,436 |  |  |  |  |
Kenvue Inc. |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Common stock, par value per share (in usd per share) |  | $ 0.01 |  |  |  |
Sale of stock (in USD per share) |  | $ 22.00 |  |  |  |
Stock issued in exchange offer (in shares) | 1,533,830,450 |  |  |  |  |
Johnson & Johnson | Kenvue Inc. |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Percentage ownership after transaction |  | 89.60% |  |  |  |
Common stock, value |  |  |  |  |  | $ 1,300
Percentage ownership after transaction | 9.50% |  |  |  |  |
Equity securities, fair market value | $ 4,300 |  | $ 400 |  |  |
Johnson & Johnson | Kenvue Inc. | Consumer Health Business |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Noncash gain on exchange offer | $ 2,800 |  |  |  |  |
IPO | Kenvue Inc. |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  | 198,734,444 |  |  |  |
Proceeds from Kenvue initial public offering |  | $ 4,200 |  |  |  |

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