Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Consolidated Statement of Income
Net sales	$ 8,152	$ 8,172	$ 24,820	$ 23,667
Operating expenses
Cost of sales	4,159	4,059	12,622	11,961
Selling, general and administrative expenses	1,547	1,637	5,920	4,871
Research, development and related expenses	430	468	1,384	1,422
Gain on sale of businesses			(530)	(490)
Total operating expenses	6,136	6,164	19,396	17,764
Operating income	2,016	2,008	5,424	5,903
Interest expense and income
Other expense (income), net	51	11	144	27
Income before income taxes	1,965	1,997	5,280	5,876
Provision for income taxes	419	564	1,266	1,532
Net income including noncontrolling interest	1,546	1,433	4,014	4,344
Less: Net income attributable to noncontrolling interest	3	4	12	9
Net income attributable to 3M	$ 1,543	$ 1,429	$ 4,002	$ 4,335
Weighted average 3M common shares outstanding - basic (in shares)	585.6	597.6	591.1	597.9
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 2.64	$ 2.39	$ 6.77	$ 7.25
Weighted average 3M common shares outstanding - diluted (in shares)	598.4	612.7	605.1	612.5
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 2.58	$ 2.33	$ 6.61	$ 7.08
Cash dividends paid per 3M common share (in dollars per share)	$ 1.36	$ 1.175	$ 4.08	$ 3.525