Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Consolidated Statement of Comprehensive Income
Net income including noncontrolling interest	$ 1,287	$ 1,131	$ 2,581	$ 2,024
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	106	123	(338)	200
Defined benefit pension and postretirement plans adjustment	58	196	177	280
Cash flow hedging instruments	(36)	(38)	11	(32)
Total other comprehensive income (loss), net of tax	128	281	(150)	448
Comprehensive income (loss) including noncontrolling interest	1,415	1,412	2,431	2,472
Comprehensive (income) loss attributable to noncontrolling interest	3	(5)	4	(7)
Comprehensive income (loss) attributable to 3M	$ 1,418	$ 1,407	$ 2,435	$ 2,465