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Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 03, 2021 | Sep. 27, 2020 | Jan. 03, 2021
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | $ 1,166 |  |
Derivatives designated as hedging instruments : Liabilities | 1,236 |  |
Available-for-sale Securities, Equity Securities | 1,867 |  | $ 1,481
Available-for-sale Securities | 18,911 |  | 14,042
Contingent consideration | 613 |  | 633
Total Gross Assets | 1,217 |  | 1,138
Credit Support Agreement (CSA) | (1,058) |  | (1,107)
Total Net Asset | 159 |  | 31
Total Gross Liabilities | 1,284 |  | 2,309
Credit Support Agreement (CSA) | (1,260) |  | (2,172)
Total Net Liabilities | 24 |  | 137
Beginning Balance | 633 | $ 1,715 | 1,715
Changes in estimated fair value (6) | 28 | (1,088) |
Additions | 0 | 107 |
Payments | (48) | (98) |
Ending Balance | 613 | 636 | 633
Contingent consideration reversal | 0 | $ (1,148) |
Quoted prices in active markets for identical assets and liabilities Level 1 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | 0 |  |
Available-for-sale Securities, Equity Securities | 1,867 |  | 1,481
Available-for-sale Securities | 0 |  |
Contingent consideration | 0 |  |
Significant other observable inputs Level 2 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 1,166 |  | 1,089
Derivatives designated as hedging instruments : Liabilities | 1,236 |  | 2,271
Available-for-sale Securities, Equity Securities | 0 |  |
Available-for-sale Securities | 18,911 |  |
Contingent consideration | 0 |  |
Significant unobservable inputs Level 3 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | 0 |  |
Available-for-sale Securities, Equity Securities | 0 |  |
Available-for-sale Securities | 0 |  |
Contingent consideration | 613 |  | 633
Interest Rate Contract |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 707 |  |
Derivatives designated as hedging instruments : Liabilities | 468 |  |
Interest Rate Contract | Quoted prices in active markets for identical assets and liabilities 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 Contract | Significant other observable inputs Level 2 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 707 |  | 240
Derivatives designated as hedging instruments : Liabilities | 468 |  | 1,569
Interest Rate Contract | Significant unobservable inputs Level 3 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 0 |  |
Derivatives designated as hedging instruments : Liabilities | 0 |  |
Forward foreign exchange contracts |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 459 |  |
Derivatives designated as hedging instruments : Liabilities | 768 |  |
Derivatives not designated as hedging instruments : Assets | 51 |  |
Derivatives not designated as hedging instruments : Liabilities | 48 |  |
Forward foreign exchange contracts | Quoted prices in active markets for identical assets and liabilities 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 |  |
Forward foreign exchange contracts | Significant other observable inputs Level 2 |  |  |
Financial assets and liabilities at fair value |  |  |
Derivatives designated as hedging instruments : Assets | 459 |  | 849
Derivatives designated as hedging instruments : Liabilities | 768 |  | 702
Derivatives not designated as hedging instruments : Assets | 51 |  | 49
Derivatives not designated as hedging instruments : Liabilities | 48 |  | 38
Forward foreign exchange contracts | Significant unobservable inputs 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 |  |
Auris Health |  |  |
Financial assets and liabilities at fair value |  |  |
Contingent consideration reversal |  |  | (1,148)
Other Noncurrent Liabilities | Auris Health |  |  |
Financial assets and liabilities at fair value |  |  |
Contingent consideration | 595 |  | 594
Other Current Liabilities |  |  |
Financial assets and liabilities at fair value |  |  |
Contingent consideration | $ 18 |  | $ 39

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