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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 29, 2019 | Sep. 30, 2018 | Sep. 29, 2019 | Sep. 30, 2018 | Dec. 30, 2018 | Dec. 31, 2017
Derivative [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Equity Securities | $ 863 |  | $ 863 |  | $ 511 |
Accumulated other comprehensive income on derivatives, after tax | (374) |  | $ (374) |  |  |
Reclassification of foreign exchange contracts into earnings, period |  |  | next 12 months |  |  |
Maximum length of time for hedge exposure |  |  | 18 months |  |  |
Unrealized gains on equity investments | $ 0 | $ 0 | $ 1 | $ 0 |  |
Weighted average interest rate on non-current debt | 3.20% |  | 3.20% |  |  |
Excess of the estimated fair value over the carrying value of debt |  |  |  |  | 300 |
Business Combination, Contingent Consideration, Liability | $ 1,596 |  | $ 1,596 |  | 335 |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value | 1,596 | 403 | 1,596 | 403 | 335 | $ 600
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements |  |  | 0 | (160) |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  | 1,132 | 125 |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  |  | 129 | (162) |  |
Forward foreign exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Collateral Already Posted, Aggregate Fair Value | 68 |  | 68 |  |  |
Derivative notional amounts outstanding | 47,300 |  | 47,300 |  | 41,100 |
Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative notional amounts outstanding | 18,800 |  | 18,800 |  | 7,300 |
Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Liability, Noncurrent |  |  |  |  | 3 |
Derivative notional amounts outstanding | 500 |  | 500 |  | 500 |
Derivative Asset, Noncurrent | 1 |  | 1 |  | 6 |
Equity Securities |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Available-for-sale Securities, Equity Securities | 863 |  | 863 |  | 511 |
Equity Investments without readily determinable value | Equity Securities |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Equity, Fair Value Adjustment, Impairment Loss |  |  | (29) |  |  |
Changes in fair value, changes in observable prices |  |  | 1 |  |  |
Other (income) expense |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 |  |  |  |
Fair Value Hedging [Member] | Sales [Member] | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings | 0 | 0 | 0 | 0 |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Sales [Member] | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Cost of Sales [Member] | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings | 0 | 0 | 0 | 0 |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Cost of Sales [Member] | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Research and Development Expense [Member] | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings | 0 | 0 | 0 | 0 |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Research and Development Expense [Member] | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Interest Income Expense Net Member | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings | 39 | 25 | 117 | 27 |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 39 | 25 | 117 | 27 |  |
Fair Value Hedging [Member] | Interest Income Expense Net Member | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | (3) | (7) | (2) | 3 |  |
Fair Value Hedging [Member] | Other (income) expense | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings | 0 | 0 | 0 | 0 |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Other (income) expense | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Sales [Member] | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Cost of Sales [Member] | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Research and Development Expense [Member] | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0 |  |
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Income Expense Net Member | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 3 | 7 | 2 | (3) |  |
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Other (income) expense | Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | $ 0 |  |
Cash Flow Hedging [Member] | Sales [Member] | Forward foreign exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | (8) | 4 |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | (23) | 15 |  |  |  |
Cash Flow Hedging [Member] | Sales [Member] | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | 0 |  |  |  |
Cash Flow Hedging [Member] | Cost of Sales [Member] | Forward foreign exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | (77) | 97 |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | (197) | 192 |  |  |  |
Cash Flow Hedging [Member] | Cost of Sales [Member] | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 |  |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | 0 |  |  |  |
Cash Flow Hedging [Member] | Research and Development Expense [Member] | Forward foreign exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 1,911 | 10 |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 1,939 | (4) |  |  |  |
Cash Flow Hedging [Member] | Research and Development Expense [Member] | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | 0 |  |  |  |
Cash Flow Hedging [Member] | Interest Income Expense Net Member | Forward foreign exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | 0 |  |  |  |
Cash Flow Hedging [Member] | Interest Income Expense Net Member | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 89 | 34 |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 159 | 35 |  |  |  |
Cash Flow Hedging [Member] | Other (income) expense | Forward foreign exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 1 | (3) |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 5 | (1) |  |  |  |
Cash Flow Hedging [Member] | Other (income) expense | Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 0 | 0 |  |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax | 0 | $ 0 |  |  |  |
Other Noncurrent Liabilities |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability | 1,453 |  | 1,453 |  | $ 335 |
Other Current Liabilities |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability | $ 143 |  | $ 143 |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 + Details
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