Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025		Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income attributable to 3M	$ 723	$ 1,145	$ 1,839		$ 2,073
Net income attributable to noncontrolling interest	2	6	8		11
Net income including noncontrolling interest	725	1,151	1,847	[1]	2,084	[1]
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	339	(145)	510		(353)
Defined benefit pension and postretirement plans adjustment	49	826	107		961
Cash flow hedging instruments	(83)	(7)	(112)		19
Total other comprehensive income (loss), net of tax	305	674	505		627
Comprehensive income including noncontrolling interest	1,030	1,825	2,352		2,711
Comprehensive (income) attributable to noncontrolling interest	(2)	(5)	(8)		(11)
Comprehensive income attributable to 3M	$ 1,028	$ 1,820	$ 2,344		$ 2,700

[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.