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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 29, 2019 | Dec. 30, 2018 | Dec. 31, 2017 | Jan. 01, 2018 | Jan. 01, 2017
Derivative [Line Items] |  |  |  |  |
Business Combination, Contingent Consideration, Liability | $ 1,715 | $ 397 |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value | 1,715 | 397 | $ 600 |  | $ 378
Other Assets, Noncurrent | 5,695 | 4,182 |  |  |
Foreign currency translation | 164 | (1,518) | 1,696 |  |
Deferred net losses (gains) on derivatives included in accumulated other comprehensive income | $ 295 |  |  |  |
Description of Reclassification of Cash Flow Hedge Gain (Loss) | next 12 months |  |  |  |
Maximum length of time for hedging transaction exposure | 18 months |  |  |  |
Unrealized holding gain (loss) arising during period | $ 0 | (1) | 159 |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability | 151 | (156) | 87 |  |
Business Combination, Consideration Transferred, Liabilities Incurred | 1,246 | 125 | 160 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | (79) | (172) | (25) |  |
Foreign exchange contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Collateral paid | 255 |  |  |  |
Derivative, notional amount | 45,300 | 41,100 |  |  |
Cross currency interest rate swaps |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, notional amount | 20,100 | 7,300 |  |  |
Interest rate swaps contracts: |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, notional amount |  | 500 |  |  |
Equity securities | Equity Investments with Readily Determinable Value |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Marketable Securities, Noncurrent | 1,148 | 511 | 751 |  |
Other Assets, Noncurrent | 1,148 | 511 |  |  |
Equity, Fair Value Adjustment | 533 | (247) |  |  |
Equity Investments, Increase (Decrease) from Acquisition (Sale) During Period | 104 | 7 |  |  |
Equity securities | Equity Investments without Readily Determinable Value |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Equity, Fair Value Adjustment, Impairment Loss | (57) | (54) |  |  |
Other Assets, Noncurrent | 712 | 681 |  |  |
Equity, Fair Value Adjustment | (38) | 13 |  |  |
Equity Investments, Increase (Decrease) from Acquisition (Sale) During Period | 69 | 158 |  |  |
Equity, Fair Value Adjustment, Change in Observable Prices | 19 | 67 |  |  |
Equity Securities without Readily Determinable Fair Value, Amount | 712 | 681 | 510 |  |
Retained Earnings |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Cumulative effect adjustment |  |  |  | $ (254) |
ASU 2016-01 - Financial Instruments | Retained Earnings |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Cumulative effect adjustment |  |  |  | $ 232 |
Fair Value, Inputs, Level 3 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Business Combination, Contingent Consideration, Liability | 1,715 | 397 |  |  |
Other Current Liabilities |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Business Combination, Contingent Consideration, Liability | 84 |  |  |  |
Other Noncurrent Liabilities |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Business Combination, Contingent Consideration, Liability | $ 1,631 | $ 397 | $ 600 |  |

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