Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Consolidated Statement of Income
Net sales	$ 8,075	$ 7,863
Operating expenses
Cost of sales	4,109	4,310
Selling, general and administrative expenses	1,768	1,948
Research, development and related expenses	537	477
Gain on sale of businesses	(2)	(8)
Total operating expenses	6,412	6,727
Operating income	1,663	1,136
Interest expense and income
Other expense (income), net	96	48
Income before income taxes	1,567	1,088
Provision for income taxes	273	195
Net income including noncontrolling interest	1,294	893
Less: Net income attributable to noncontrolling interest	2	2
Net income attributable to 3M	$ 1,292	$ 891
Weighted average 3M common shares outstanding - basic (in shares)	576.8	577.5
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 2.24	$ 1.54
Weighted average 3M common shares outstanding - diluted (in shares)	581.5	588.5
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 2.22	$ 1.51