Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Consolidated Statement of Comprehensive Income
Net income including noncontrolling interest	$ 1,417	$ 1,588	$ 3,998	$ 3,612
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	271	(202)	(67)	(2)
Defined benefit pension and postretirement plans adjustment	127	76	304	356
Cash flow hedging instruments	(71)	8	(60)	(24)
Total other comprehensive income (loss), net of tax	327	(118)	177	330
Comprehensive income (loss) including noncontrolling interest	1,744	1,470	4,175	3,942
Comprehensive (income) loss attributable to noncontrolling interest	(5)	(3)	(1)	(10)
Comprehensive income (loss) attributable to 3M	$ 1,739	$ 1,467	$ 4,174	$ 3,932