Segments of Business and Geographic Areas - Sales By Segment Of Business (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Segment Reporting Information [Line Items]
Gain (Loss) on Sale of Assets and Asset Impairment Charges			$ 527	$ 276
Sales by segment of business
Sales	$ 19,650	$ 17,820	$ 56,255	53,784
Percentage Change In Sales By Segment Of Business	10.30%		4.60%
United States
Sales by segment of business
Sales	$ 10,290	9,381	$ 29,394	28,274
Percentage Change In Sales By Segment Of Business	9.70%		4.00%
International
Sales by segment of business
Sales	$ 9,360	8,439	$ 26,861	25,510
Percentage Change In Sales By Segment Of Business	10.90%		5.30%
Consumer
Sales by segment of business
Sales	$ 3,356	3,261	$ 10,062	9,875
Percentage Change In Sales By Segment Of Business	2.90%		1.90%
Consumer | United States
Sales by segment of business
Sales	$ 1,285	1,291	$ 4,186	4,033
Percentage Change In Sales By Segment Of Business	(0.50%)		3.80%
Consumer | International
Sales by segment of business
Sales	$ 2,071	1,970	$ 5,876	5,842
Percentage Change In Sales By Segment Of Business	5.10%		0.60%
Pharmaceutical
Sales by segment of business
Sales	$ 9,695	8,400	$ 26,575	25,232
Percentage Change In Sales By Segment Of Business	15.40%		5.30%
Pharmaceutical | United States
Sales by segment of business
Sales	$ 5,816	5,042	$ 15,698	15,123
Percentage Change In Sales By Segment Of Business	15.40%		3.80%
Pharmaceutical | International
Sales by segment of business
Sales	$ 3,879	3,358	$ 10,877	10,109
Percentage Change In Sales By Segment Of Business	15.50%		7.60%
Medical Devices
Sales by segment of business
Sales	$ 6,599	6,159	$ 19,618	18,677
Percentage Change In Sales By Segment Of Business	7.10%		5.00%
Medical Devices | United States
Sales by segment of business
Sales	$ 3,189	3,048	$ 9,510	9,118
Percentage Change In Sales By Segment Of Business	4.60%		4.30%
Medical Devices | International
Sales by segment of business
Sales	$ 3,410	$ 3,111	$ 10,108	$ 9,559
Percentage Change In Sales By Segment Of Business	9.60%		5.70%