Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Consolidated Statement of Income
Net sales	$ 7,176	$ 8,171	$ 15,251	$ 16,034
Operating expenses
Cost of sales	3,805	4,313	7,914	8,623
Selling, general and administrative expenses	1,594	1,686	3,362	3,634
Research, development and related expenses	424	470	961	947
Gain on sale of businesses	(387)		(389)	(8)
Total operating expenses	5,436	6,469	11,848	13,196
Operating income	1,740	1,702	3,403	2,838
Interest expense and income
Other expense (income), net	111	256	207	304
Income before income taxes	1,629	1,446	3,196	2,534
Provision for income taxes	342	315	615	510
Net income including noncontrolling interest	1,287	1,131	2,581	2,024
Less: Net income (loss) attributable to noncontrolling interest	(3)	4	(1)	6
Net income attributable to 3M	$ 1,290	$ 1,127	$ 2,582	$ 2,018
Weighted average 3M common shares outstanding - basic (in shares)	577.0	577.7	576.9	577.6
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 2.24	$ 1.95	$ 4.48	$ 3.49
Weighted average 3M common shares outstanding - diluted (in shares)	580.8	586.1	581.2	587.3
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 2.22	$ 1.92	$ 4.44	$ 3.44