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Fair value measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Jan. 01, 2023 | Jan. 02, 2022
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | $ 1,527 |  |
Derivatives designated as hedging instruments : Liabilities | 5,962 |  |
Equity investments | 4,473 | $ 576 |
Debt securities | 8,874 | 10,487 |
Contingent Consideration | 1,092 | 1,120 |
Total Gross Assets | 1,591 | 2,201 |
Credit Support Agreements (CSA) | $ (1,575) | $ (2,176) |
Derivative Asset, Statement Of Financial Position, Extensible Enumeration, Not Disclosed Flag | Total Net Asset | Total Net Asset |
Total Net Asset | $ 16 | $ 25 |
Total Gross Liabilities | 6,037 | 3,357 |
Credit Support Agreements (CSA) | $ (5,604) | $ (3,023) |
Derivative Liability, Statement Of Financial Position, Extensible Enumeration, Not Disclosed Flag | Total Net Liabilities | Total Net Liabilities |
Total Net Liabilities | $ 433 | $ 334 |
Beginning Balance | 1,120 | 533 | $ 633
Changes in estimated fair value | 29 | (194) | (52)
Additions | 0 | 792 | 0
Payments/Other | (57) | (11) | (48)
Ending Balance | 1,092 | 1,120 | 533
Other Noncurrent Liabilities |  |  |
Financial assets and liabilities at fair value |  |  |
Contingent Consideration | 1,092 | 1,116 | 520
Other Current Liabilities |  |  |
Financial assets and liabilities at fair value |  |  |
Contingent Consideration |  | 4 | $ 13
Abiomed |  |  |
Financial assets and liabilities at fair value |  |  |
Contingent Consideration | 704 |  |
Level 1 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | 0 |  |
Equity investments | 4,473 | 576 |
Debt securities | 0 |  |
Level 2 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 1,527 | 2,163 |
Derivatives designated as hedging instruments : Liabilities | 5,962 | 3,289 |
Equity investments | 0 |  |
Debt securities | 8,874 |  |
Level 3 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | 0 |  |
Equity investments | 0 |  |
Debt securities | 0 |  |
Contingent Consideration | 1,092 | 1,120 |
Foreign exchange contracts |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 539 |  |
Derivatives designated as hedging instruments : Liabilities | 624 |  |
Derivatives not designated as hedging instruments : Assets | 64 |  |
Derivatives not designated as hedging instruments : Liabilities | 75 |  |
Foreign exchange contracts | Level 1 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | 0 |  |
Derivatives not designated as hedging instruments : Assets | 0 |  |
Derivatives not designated as hedging instruments : Liabilities | 0 |  |
Foreign exchange contracts | Level 2 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 539 | 629 |
Derivatives designated as hedging instruments : Liabilities | 624 | 511 |
Derivatives not designated as hedging instruments : Assets | 64 | 38 |
Derivatives not designated as hedging instruments : Liabilities | 75 | 68 |
Foreign exchange contracts | Level 3 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | 0 |  |
Derivatives not designated as hedging instruments : Assets | 0 |  |
Derivatives not designated as hedging instruments : Liabilities | 0 |  |
Interest rate swaps contracts: |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 988 |  |
Derivatives designated as hedging instruments : Liabilities | 5,338 |  |
Interest rate swaps contracts: | Level 1 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | 0 |  |
Interest rate swaps contracts: | Level 2 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 988 | 1,534 |
Derivatives designated as hedging instruments : Liabilities | 5,338 | $ 2,778 |
Interest rate swaps contracts: | Level 3 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | $ 0 |  |

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