Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income including noncontrolling interest	$ 1,303	$ 1,283	$ 2,504	$ 2,508
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	23	127	(170)	147
Defined benefit pension and postretirement plans adjustment	96	60	187	121
Debt and equity securities - unrealized gain (loss)	0	1	0	2
Cash flow hedging instruments - unrealized gain (loss)	(32)	(9)	38	(7)
Total other comprehensive income (loss), net of tax	87	179	55	263
Comprehensive income (loss) including noncontrolling interest	1,390	1,462	2,559	2,771
Comprehensive (income) loss attributable to noncontrolling interest	(2)	(20)	(4)	(50)
Comprehensive income (loss) attributable to 3M	$ 1,388	$ 1,442	$ 2,555	$ 2,721