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Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 29, 2019 | Sep. 30, 2018 | Sep. 29, 2019 | Sep. 30, 2018 | Dec. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Business Combination, Contingent Consideration, Liability | $ 1,596 |  | $ 1,596 |  | $ 335
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income | 1,955 | $ 166 | 1,885 | $ 91 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax | 1,922 | 262 | 1,706 | 37 |
Interest Rate Contract |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Notional Amount | 500 |  | 500 |  | 500
Forward foreign exchange contracts |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Collateral Already Posted, Aggregate Fair Value | 68 |  | 68 |  |
Derivative, Notional Amount | 47,300 |  | 47,300 |  | 41,100
Cross currency interest rate swaps |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Notional Amount | 18,800 |  | 18,800 |  | $ 7,300
Fair Value Hedging | Interest Rate Contract | Sales to customers |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |
Fair Value Hedging | Interest Rate Contract | Cost of products sold |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |
Fair Value Hedging | Interest Rate Contract | Research and Development Expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |
Fair Value Hedging | Interest Rate Contract | Other (income) expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |
Fair Value Hedging | Interest Rate Contract | Interest (income)/Interest expense, net |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | (3) | (7) | (2) | 3 |
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 | 25 | 117 | 27 |
Unrealized gain (loss) arising during period | 39 | 25 | 117 | 27 |
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Sales to customers |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Cost of products sold |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Research and Development Expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Other (income) expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Interest (income)/Interest expense, net |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 3 | 7 | 2 | (3) |
Cash Flow Hedging | Forward foreign exchange contracts | Sales to customers |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | (23) | 15 |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | (43) | 50 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | (29) | (3) |
Cash Flow Hedging | Forward foreign exchange contracts | Cost of products sold |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | (197) | 192 |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | (213) | 175 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | (543) | 138 |
Cash Flow Hedging | Forward foreign exchange contracts | Research and Development Expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 1,939 | (4) |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | 1,808 | (242) |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | 1,847 | (220) |
Cash Flow Hedging | Forward foreign exchange contracts | Other (income) expense |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Unrealized gain (loss) arising during period | 5 | (1) |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | 9 | (24) |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | 15 | (16) |
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 |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | 0 | 0 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | 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 |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | 0 | 0 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | 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 |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | 0 | 0 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | 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 |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | 0 | 0 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | 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 |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | 0 | 0 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | 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 | $ 159 | $ 35 |  |  |
Summary of designated derivatives |  |  |  |  |
Gain/ (Loss) reclassified from Accumulated OCI into income |  |  | 207 | 106 |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax |  |  | $ 299 | $ 111 |

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