Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Consolidated Statement of Income
Net sales	$ 8,390	$ 7,810	$ 16,668	$ 15,495
Operating expenses
Cost of sales	4,227	4,020	8,463	7,902
Selling, general and administrative expenses	1,800	1,620	4,373	3,234
Research, development and related expenses	468	478	954	954
Gain on sale of businesses	(506)	(461)	(530)	(490)
Total operating expenses	5,989	5,657	13,260	11,600
Operating income	2,401	2,153	3,408	3,895
Interest expense and income
Other expense (income), net	51	11	93	16
Income before income taxes	2,350	2,142	3,315	3,879
Provision for income taxes	488	557	847	968
Net income including noncontrolling interest	1,862	1,585	2,468	2,911
Less: Net income attributable to noncontrolling interest	5	2	9	5
Net income attributable to 3M	$ 1,857	$ 1,583	$ 2,459	$ 2,906
Weighted average 3M common shares outstanding - basic (in shares)	591.4	598.1	593.8	598.1
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 3.14	$ 2.65	$ 4.14	$ 4.86
Weighted average 3M common shares outstanding - diluted (in shares)	604.2	612.8	608.5	612.4
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 3.07	$ 2.58	$ 4.04	$ 4.74
Cash dividends paid per 3M common share (in dollars per share)	$ 1.36	$ 1.175	$ 2.72	$ 2.35