Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income including noncontrolling interest	$ 1,131	$ 1,862	$ 2,024	$ 2,468
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	123	(496)	200	(329)
Defined benefit pension and postretirement plans adjustment	196	114	280	230
Cash flow hedging instruments	(38)	162	(32)	101
Total other comprehensive income (loss), net of tax	281	(220)	448	2
Comprehensive income (loss) including noncontrolling interest	1,412	1,642	2,472	2,470
Comprehensive (income) loss attributable to noncontrolling interest	(5)	(1)	(7)	(4)
Comprehensive income (loss) attributable to 3M	$ 1,407	$ 1,641	$ 2,465	$ 2,466