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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 18 Months Ended
--- | --- | --- | ---
Oct. 01, 2017 | Jan. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017
Derivative [Line Items] |  |  |  |  |  |
Foreign currency translation | $ 359 |  | $ (94) | $ 1,597 | $ 490 |
Accumulated other comprehensive income on derivatives, after tax | 57 |  |  | $ 57 |  | $ 57
Reclassification of foreign exchange contracts into earnings, period |  |  |  | next 12 months |  |
Maximum length of time for hedge exposure |  |  |  | 18 months |  |
Other income/(expense), net, related to foreign exchange contracts, non hedging | $ (12) |  | $ 35 | $ 22 | $ (6) |
Excess fair value over carrying value of cash and cash equivalents |  | $ 200 |  |  |  |
Weighted average interest rate on non-current debt | 3.20% |  |  | 3.20% |  | 3.20%
Excess of the estimated fair value over the carrying value of debt |  | 1,600 |  |  |  |
Foreign exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Collateral Already Posted, Aggregate Fair Value | $ 43 |  |  | $ 43 |  | $ 43
Derivative notional amounts outstanding | 34,700 | 36,000 |  | 34,700 |  | 34,700
Cross currency interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative notional amounts outstanding | 2,300 | 2,300 |  | 2,300 |  | 2,300
Interest Rate Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative notional amounts outstanding | 1,800 | 1,800 |  | 1,800 |  | 1,800
Equity Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative notional amounts outstanding | 100 | $ 300 |  | 100 |  | 100
Other Comprehensive Income (Loss) [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Foreign currency translation | $ (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 Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e681-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80784-113994 + Details
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