Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statement of Income
Net sales	$ 8,172	$ 7,709	$ 23,667	$ 22,780
Operating expenses
Cost of sales	4,045	3,847	11,921	11,324
Selling, general and administrative expenses	1,623	1,531	4,830	4,624
Research, development and related expenses	463	427	1,407	1,314
Gain on sale of businesses			(490)	(40)
Total operating expenses	6,131	5,805	17,668	17,222
Operating income	2,041	1,904	5,999	5,558
Interest expense and income
Interest expense	57	50	156	135
Interest income	(13)	(8)	(33)	(20)
Total interest expense - net	44	42	123	115
Income before income taxes	1,997	1,862	5,876	5,443
Provision for income taxes	564	531	1,532	1,541
Net income including noncontrolling interest	1,433	1,331	4,344	3,902
Less: Net income attributable to noncontrolling interest	4	2	9	7
Net income attributable to 3M	$ 1,429	$ 1,329	$ 4,335	$ 3,895
Weighted average 3M common shares outstanding - basic (in shares)	597.6	604.4	597.9	606.2
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 2.39	$ 2.20	$ 7.25	$ 6.43
Weighted average 3M common shares outstanding - diluted (in shares)	612.7	618.8	612.5	620.3
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 2.33	$ 2.15	$ 7.08	$ 6.28
Cash dividends paid per 3M common share (in dollars per share)	$ 1.175	$ 1.11	$ 3.525	$ 3.33