Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Statement of Income
Net sales	$ 7,991	$ 8,152	$ 24,025	$ 24,820
Operating expenses
Cost of sales	4,188	4,159	12,811	12,622
Selling, general and administrative expenses	1,455	1,547	5,089	5,920
Research, development and related expenses	443	430	1,390	1,384
Gain on sale of businesses	(106)		(114)	(530)
Total operating expenses	5,980	6,136	19,176	19,396
Operating income	2,011	2,016	4,849	5,424
Interest expense and income
Other expense (income), net	45	51	349	144
Income before income taxes	1,966	1,965	4,500	5,280
Provision for income taxes	378	419	888	1,266
Net income including noncontrolling interest	1,588	1,546	3,612	4,014
Less: Net income attributable to noncontrolling interest	5	3	11	12
Net income attributable to 3M	$ 1,583	$ 1,543	$ 3,601	$ 4,002
Weighted average 3M common shares outstanding - basic (in shares)	576.5	585.6	577.2	591.1
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 2.75	$ 2.64	$ 6.24	$ 6.77
Weighted average 3M common shares outstanding - diluted (in shares)	583.0	598.4	585.9	605.1
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 2.72	$ 2.58	$ 6.15	$ 6.61