Inventories (Details) - USD ($) $ in Millions	Jul. 02, 2017	Jan. 01, 2017
Summary of Inventories
Raw materials and supplies	$ 1,138	$ 952
Goods in process	2,515	2,185
Finished goods	6,046	5,007
Total inventories	9,699	$ 8,144
Inventories [Member] \| Codman Neurosurgery [Member]
Inventory [Line Items]
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	$ 58

Amount classified as other assets attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Aggregated amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. This amount is net of valuation reserves and adjustments.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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