Consolidated Statement of Income (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net sales	$ 7,680	$ 6,731	$ 14,991	$ 13,079
Operating expenses
Cost of sales	4,040	3,435	7,842	6,673
Selling, general and administrative expenses	1,581	1,350	3,114	2,673
Research, development and related expenses	404	350	802	692
Total operating expenses	6,025	5,135	11,758	10,038
Operating income	1,655	1,596	3,233	3,041
Interest expense and income
Interest expense	50	52	93	100
Interest income	(9)	(10)	(19)	(16)
Total interest expense (income)	41	42	74	84
Income before income taxes	1,614	1,554	3,159	2,957
Provision for income taxes	437	414	879	862
Net income including noncontrolling interest	1,177	1,140	2,280	2,095
Less: Net income attributable to noncontrolling interest	17	19	39	44
Net income attributable to 3M	$ 1,160	$ 1,121	$ 2,241	$ 2,051
Weighted average 3M common shares outstanding - basic (in shares)	713.4	714.5	712.5	713.1
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 1.63	$ 1.57	$ 3.15	$ 2.88
Weighted average 3M common shares outstanding - diluted (in shares)	726.5	725.7	726.4	724.6
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 1.60	$ 1.54	$ 3.09	$ 2.83
Cash dividends paid per 3M common share (in dollars per share)	$ 0.55	$ 0.525	$ 1.10	$ 1.05