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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 | 9 Months Ended
--- | --- | ---
Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Oct. 02, 2016
Sales by geographic area |  |  |  |
Sales | $ 19,650 | $ 17,820 | $ 56,255 | $ 53,784
Percentage Change In Sales By Geographic Area | 10.30% |  | 4.60% |
UNITED STATES |  |  |  |
Sales by geographic area |  |  |  |
Sales | $ 10,290 | 9,381 | $ 29,394 | 28,274
Percentage Change In Sales By Geographic Area | 9.70% |  | 4.00% |
Europe |  |  |  |
Sales by geographic area |  |  |  |
Sales | $ 4,308 | 3,832 | $ 12,398 | 11,769
Percentage Change In Sales By Geographic Area | 12.40% |  | 5.30% |
Western Hemisphere, excluding U.S. |  |  |  |
Sales by geographic area |  |  |  |
Sales | $ 1,569 | 1,396 | $ 4,522 | 4,269
Percentage Change In Sales By Geographic Area | 12.40% |  | 5.90% |
Asia-Pacific, Africa |  |  |  |
Sales by geographic area |  |  |  |
Sales | $ 3,483 | 3,211 | $ 9,941 | 9,472
Percentage Change In Sales By Geographic Area | 8.50% |  | 5.00% |
Medical Devices [Member] |  |  |  |
Sales by geographic area |  |  |  |
Sales | $ 6,599 | 6,159 | $ 19,618 | 18,677
Medical Devices [Member] | UNITED STATES |  |  |  |
Sales by geographic area |  |  |  |
Sales | $ 3,189 | $ 3,048 | $ 9,510 | $ 9,118

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