Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Consolidated Statement of Comprehensive Income
Net income including noncontrolling interest	$ 1,303	$ 3,152	$ 2,613
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	106	(52)	(338)
Defined benefit pension and postretirement plans adjustment	47	240	155
Cash flow hedging instruments	(36)	47	11
Total other comprehensive income (loss), net of tax	117	235	(172)
Comprehensive income (loss) including noncontrolling interest	1,420	3,387	2,441
Comprehensive (income) loss attributable to noncontrolling interest	3	(4)	4
Comprehensive income (loss) attributable to 3M	$ 1,423	$ 3,383	$ 2,445