Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Consolidated Statement of Comprehensive Income
Net income including noncontrolling interest	$ 1,627	$ 1,310
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(222)	(444)
Defined benefit pension and postretirement plans adjustment	119	108
Cash flow hedging instruments	58	47
Total other comprehensive income (loss), net of tax	(45)	(289)
Comprehensive income (loss) including noncontrolling interest	1,582	1,021
Comprehensive (income) loss attributable to noncontrolling interest	(4)	1
Comprehensive income (loss) attributable to 3M	$ 1,578	$ 1,022