Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025		Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income attributable to 3M	$ 834	$ 1,372	$ 2,673		$ 3,445
Net income attributable to noncontrolling interest	7	4	15		15
Net income including noncontrolling interest	841	1,376	2,688	[1]	3,460	[1]
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(71)	368	439		15
Defined benefit pension and postretirement plans adjustment	139	48	246		1,009
Cash flow hedging instruments	21	(74)	(91)		(55)
Total other comprehensive income (loss), net of tax	89	342	594		969
Comprehensive income including noncontrolling interest	930	1,718	3,282		4,429
Comprehensive (income) attributable to noncontrolling interest	(3)	(3)	(11)		(14)
Comprehensive income attributable to 3M	$ 927	$ 1,715	$ 3,271		$ 4,415

[1] The Consolidated Statements of Cash Flows include the results of continuing and discontinued operations and, therefore, also include cash and cash equivalents associated with Solventum through its April 2024 separation from 3M that were presented in current assets of discontinued operations in the 3M Consolidated Balance Sheet.