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Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 18 Months Ended |
--- | --- | --- | --- | ---
Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Jan. 01, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax | $ 359 | $ (94) | $ 1,597 | $ 490 |  |
Equity Contract [Member] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Derivative, Notional Amount | 100 |  | 100 |  | $ 100 | $ 300
Foreign exchange contracts |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Collateral Already Posted, Aggregate Fair Value | 43 |  | 43 |  | 43 |
Derivative, Notional Amount | 34,700 |  | 34,700 |  | 34,700 | 36,000
Cross currency interest rate swaps |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Derivative, Notional Amount | 2,300 |  | 2,300 |  | 2,300 | $ 2,300
Designated as Hedging Instrument |  |  |  |  |  |
Summary of designated derivatives |  |  |  |  |  |
Gain/ (Loss) recognized in Accumulated OCI | 62 | 4 | (8) | (437) |  |
Gain/ (Loss) reclassified from Accumulated OCI into income | (31) | 3 | (350) | (109) |  |
Gain/ (Loss) recognized in Other income/expense | 4 | (4) | (7) | (14) |  |
Designated as Hedging Instrument | Foreign exchange contracts | Sales to customers |  |  |  |  |  |
Summary of designated derivatives |  |  |  |  |  |
Gain/ (Loss) recognized in Accumulated OCI | 18 | (12) | 40 | (39) |  |
Gain/ (Loss) reclassified from Accumulated OCI into income | 5 | (8) | (34) | (29) |  |
Gain/ (Loss) recognized in Other income/expense | 0 | (1) | (1) | (1) |  |
Designated as Hedging Instrument | Foreign exchange contracts | Cost of products sold |  |  |  |  |  |
Summary of designated derivatives |  |  |  |  |  |
Gain/ (Loss) recognized in Accumulated OCI | (16) | (4) | 105 | (226) |  |
Gain/ (Loss) reclassified from Accumulated OCI into income | (63) | 13 | (162) | 5 |  |
Gain/ (Loss) recognized in Other income/expense | 5 | (4) | (11) | (10) |  |
Designated as Hedging Instrument | Foreign exchange contracts | Research and development expense |  |  |  |  |  |
Summary of designated derivatives |  |  |  |  |  |
Gain/ (Loss) recognized in Accumulated OCI | (39) | (5) | (167) | (100) |  |
Gain/ (Loss) reclassified from Accumulated OCI into income | (30) | (2) | (131) | (98) |  |
Gain/ (Loss) recognized in Other income/expense | (1) | 1 | 5 | 0 |  |
Designated as Hedging Instrument | Foreign exchange contracts | Other (income) expense, net |  |  |  |  |  |
Summary of designated derivatives |  |  |  |  |  |
Gain/ (Loss) recognized in Accumulated OCI | (15) | (4) | (59) | (110) |  |
Gain/ (Loss) reclassified from Accumulated OCI into income | (49) | (12) | (86) | (14) |  |
Gain/ (Loss) recognized in Other income/expense | 0 | 0 | 0 | (3) |  |
Designated as Hedging Instrument | Cross currency interest rate swaps | Interest (income)/Interest expense, net |  |  |  |  |  |
Summary of designated derivatives |  |  |  |  |  |
Gain/ (Loss) recognized in Accumulated OCI | 114 | 29 | 73 | 38 |  |
Gain/ (Loss) reclassified from Accumulated OCI into income | 106 | 12 | 63 | 27 |  |
Gain/ (Loss) recognized in Other income/expense | 0 | $ 0 | 0 | $ 0 |  |
Other Comprehensive Income (Loss) [Member] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax | $ (151) |  | $ (529) |  | $ (155) |

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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 The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624258-113959 + Details
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