Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Consolidated Statement of Income
Net sales	$ 8,278	$ 7,685
Operating expenses
Cost of sales	4,236	3,882
Selling, general and administrative expenses	2,573	1,614
Research, development and related expenses	486	476
Gain on sale of businesses	(24)	(29)
Total operating expenses	7,271	5,943
Operating income	1,007	1,742
Interest expense and income
Other expense (income), net	42	5
Income before income taxes	965	1,737
Provision for income taxes	359	411
Net income including noncontrolling interest	606	1,326
Less: Net income attributable to noncontrolling interest	4	3
Net income attributable to 3M	$ 602	$ 1,323
Weighted average 3M common shares outstanding - basic (in shares)	596.2	598.1
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 1.01	$ 2.21
Weighted average 3M common shares outstanding - diluted (in shares)	612.7	612.0
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 0.98	$ 2.16
Cash dividends paid per 3M common share (in dollars per share)	$ 1.36	$ 1.175