Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net income including noncontrolling interest	$ 659	$ 1,122
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(95)	171
Defined benefit pension and postretirement plans adjustment	47	58
Cash flow hedging instruments	15	(29)
Total other comprehensive income (loss), net of tax	(33)	200
Comprehensive income including noncontrolling interest	626	1,322
Comprehensive (income) attributable to noncontrolling interest	(3)	(6)
Comprehensive income attributable to 3M	$ 623	$ 1,316