Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statement of Comprehensive Income
Net income including noncontrolling interest	$ 1,433	$ 1,331	$ 4,344	$ 3,902
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	44	17	269	192
Defined benefit pension and postretirement plans adjustment	80	67	241	203
Cash flow hedging instruments - unrealized gain (loss)	(49)	(45)	(176)	(182)
Total other comprehensive income (loss), net of tax	75	39	334	213
Comprehensive income (loss) including noncontrolling interest	1,508	1,370	4,678	4,115
Comprehensive (income) loss attributable to noncontrolling interest	(3)	(3)	(11)	(7)
Comprehensive income (loss) attributable to 3M	$ 1,505	$ 1,367	$ 4,667	$ 4,108