Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statement of Income
Net sales	$ 7,863	$ 8,278
Operating expenses
Cost of sales	4,310	4,236
Selling, general and administrative expenses	1,948	2,573
Research, development and related expenses	477	486
Gain on sale of businesses	(8)	(24)
Total operating expenses	6,727	7,271
Operating income	1,136	1,007
Interest expense and income
Other expense (income), net	48	42
Income before income taxes	1,088	965
Provision for income taxes	195	359
Net income including noncontrolling interest	893	606
Less: Net income attributable to noncontrolling interest	2	4
Net income attributable to 3M	$ 891	$ 602
Weighted average 3M common shares outstanding - basic (in shares)	577.5	596.2
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 1.54	$ 1.01
Weighted average 3M common shares outstanding - diluted (in shares)	588.5	612.7
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 1.51	$ 0.98