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Segments of Business and Geographic Areas - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Oct. 01, 2017 | Jul. 02, 2017 | Apr. 02, 2017 | Jan. 01, 2017 | Oct. 02, 2016 | Jul. 03, 2016 | Apr. 03, 2016 | Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales to Customers | $ 20,195 | $ 19,650 | $ 18,839 | $ 17,766 | $ 18,106 | $ 17,820 | $ 18,482 | $ 17,482 | $ 76,450 | $ 71,890 | $ 70,074
Identifiable Assets | 157,303 |  |  |  | 141,208 |  |  |  | 157,303 | 141,208 |
Corporate, Non-Segment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other Non Long Lived Assets | 55,164 |  |  |  | 75,615 |  |  |  | 55,164 | 75,615 |
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales to Customers |  |  |  |  |  |  |  |  | 76,450 | 71,890 | 70,074
Long-Lived Assets | 100,996 |  |  |  | 64,403 |  |  |  | 100,996 | 64,403 |
United States | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales to Customers |  |  |  |  |  |  |  |  | 39,863 | 37,811 | 35,687
Long-Lived Assets | 38,556 |  |  |  | 36,934 |  |  |  | 38,556 | 36,934 |
Europe | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales to Customers |  |  |  |  |  |  |  |  | 17,126 | 15,770 | 15,995
Long-Lived Assets | 56,677 |  |  |  | 21,996 |  |  |  | 56,677 | 21,996 |
Western Hemisphere excluding U.S. | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales to Customers |  |  |  |  |  |  |  |  | 6,041 | 5,734 | 6,045
Long-Lived Assets | 2,990 |  |  |  | 2,961 |  |  |  | 2,990 | 2,961 |
Asia-Pacific, Africa | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales to Customers |  |  |  |  |  |  |  |  | 13,420 | 12,575 | 12,347
Long-Lived Assets | 2,773 |  |  |  | 2,512 |  |  |  | 2,773 | 2,512 |
General Corporate | Corporate, Non-Segment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets | $ 1,143 |  |  |  | $ 1,190 |  |  |  | 1,143 | 1,190 |
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales to Customers |  |  |  |  |  |  |  |  | $ 76,450 | $ 71,890 | $ 70,074
Sales Revenue, Net |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk (as a percent) |  |  |  |  |  |  |  |  |  |  | 12.50%
Sales Revenue, Net | Wholesaler 1 |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk (as a percent) |  |  |  |  |  |  |  |  | 14.00% | 13.50% |
Sales Revenue, Net | Wholesaler 2 |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk (as a percent) |  |  |  |  |  |  |  |  | 10.00% | 10.70% |

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