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Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 28, 2020 | Jun. 30, 2019 | Jun. 28, 2020 | Jun. 30, 2019 | Dec. 29, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Business Combination, Contingent Consideration, Liability | $ 796 |  | $ 796 |  | $ 1,715
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income | 60 | $ 26 | (78) | $ (70) |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax | 21 | 86 | 853 | (216) |
Other (income) expense |  |  |  |  |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 | 0 | 0 |
Forward foreign exchange contracts |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Collateral Already Posted, Aggregate Fair Value | 926 |  | 926 |  |
Derivative, Notional Amount | 43,900 |  | 43,900 |  | 45,300
Cross currency interest rate swaps |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Notional Amount | 22,200 |  | 22,200 |  | $ 20,100
Fair Value Hedging | Cross currency interest rate swaps | Sales to customers |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net | 0 | 0 | 0 | 0 |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Fair Value Hedging | Cross currency interest rate swaps | Cost of products sold |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net | 0 | 0 | 0 | 0 |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Fair Value Hedging | Cross currency interest rate swaps | Research and Development Expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net | 0 | 0 | 0 | 0 |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Fair Value Hedging | Cross currency interest rate swaps | Other (income) expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net | 0 | 0 | 0 | 0 |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Fair Value Hedging | Cross currency interest rate swaps | Interest (income)/Interest expense, net |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net | 39 | 39 | 79 | 78 |
Unrealized gain (loss) arising during period | 39 | 39 | 79 | 78 |
Cash Flow Hedging | Forward foreign exchange contracts | Sales to customers |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | (2) | 0 | 9 | (6) |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | (2) | (14) | 7 | (35) |
Cash Flow Hedging | Forward foreign exchange contracts | Cost of products sold |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | (128) | (50) | 174 | (346) |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | (62) | (101) | (235) | (136) |
Cash Flow Hedging | Forward foreign exchange contracts | Research and Development Expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | (10) | 18 | (120) | (92) |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 2 | 36 | (108) | (103) |
Cash Flow Hedging | Forward foreign exchange contracts | Other (income) expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 22 | (3) | (14) | 10 |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 2 | (2) | 8 |
Cash Flow Hedging | Forward foreign exchange contracts | Interest (income)/Interest expense, net |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 | 0 | 0 |
Cash Flow Hedging | Cross currency interest rate swaps | Sales to customers |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 | 0 | 0 |
Cash Flow Hedging | Cross currency interest rate swaps | Cost of products sold |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 |  | 0 | 0 |
Cash Flow Hedging | Cross currency interest rate swaps | Research and Development Expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 | 0 | 0 |
Cash Flow Hedging | Cross currency interest rate swaps | Other (income) expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 0 | 0 | 0 | 0 |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 | 0 | 0 |
Cash Flow Hedging | Cross currency interest rate swaps | Interest (income)/Interest expense, net |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 100 | 82 | 725 | 140 |
Summary of designated derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | $ 83 | $ 64 | $ 181 | $ 118 |

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