Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income including noncontrolling interest	$ 1,283	$ 1,213	$ 2,508	$ 2,360
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	127	(279)	147	(677)
Defined benefit pension and postretirement plans adjustment	60	91	121	176
Debt and equity securities - unrealized gain (loss)	1	(4)	2	(4)
Cash flow hedging instruments - unrealized gain (loss)	(9)	8	(7)	32
Total other comprehensive income (loss), net of tax	179	(184)	263	(473)
Comprehensive income (loss) including noncontrolling interest	1,462	1,029	2,771	1,887
Comprehensive (income) loss attributable to noncontrolling interest	(20)	3	(50)	23
Comprehensive income (loss) attributable to 3M	$ 1,442	$ 1,032	$ 2,721	$ 1,910