Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statement of Income
Net sales	$ 7,810	$ 7,662	$ 15,495	$ 15,071
Operating expenses
Cost of sales	4,007	3,799	7,876	7,477
Selling, general and administrative expenses	1,607	1,560	3,207	3,093
Research, development and related expenses	473	437	944	887
Gain on sale of businesses	(461)		(490)	(40)
Total operating expenses	5,626	5,796	11,537	11,417
Operating income	2,184	1,866	3,958	3,654
Interest expense and income
Interest expense	54	38	99	85
Interest income	(12)	(7)	(20)	(12)
Total interest expense - net	42	31	79	73
Income before income taxes	2,142	1,835	3,879	3,581
Provision for income taxes	557	542	968	1,010
Net income including noncontrolling interest	1,585	1,293	2,911	2,571
Less: Net income attributable to noncontrolling interest	2	2	5	5
Net income attributable to 3M	$ 1,583	$ 1,291	$ 2,906	$ 2,566
Weighted average 3M common shares outstanding - basic (in shares)	598.1	606.9	598.1	607.2
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 2.65	$ 2.13	$ 4.86	$ 4.23
Weighted average 3M common shares outstanding - diluted (in shares)	612.8	620.9	612.4	621.1
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 2.58	$ 2.08	$ 4.74	$ 4.13
Cash dividends paid per 3M common share (in dollars per share)	$ 1.175	$ 1.11	$ 2.35	$ 2.22