Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net sales	$ 7,831	$ 7,634
Operating expenses
Cost of sales	4,031	3,969
Selling, general and administrative expenses	1,632	1,589
Research, development and related expenses	452	430
Total operating expenses	6,115	5,988
Operating income	1,716	1,646
Interest expense and income
Interest expense	37	39
Interest income	(9)	(10)
Total interest expense - net	28	29
Income before income taxes	1,688	1,617
Provision for income taxes	463	470
Net income including noncontrolling interest	1,225	1,147
Less: Net income attributable to noncontrolling interest	18	18
Net income attributable to 3M	$ 1,207	$ 1,129
Weighted average 3M common shares outstanding - basic (in shares)	661.5	691.1
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 1.83	$ 1.63
Weighted average 3M common shares outstanding - diluted (in shares)	674.5	702.1
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 1.79	$ 1.61
Cash dividends paid per 3M common share (in dollars per share)	$ 0.855	$ 0.635