Consolidated Statement of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025		Sep. 30, 2024
Income Statement [Abstract]
Net sales	$ 6,517	$ 6,294	$ 18,815		$ 18,565
Operating expenses
Cost of sales	3,792	3,647	10,916		10,703
Selling, general and administrative expenses	820	1,062	3,032		3,322
Research, development and related expenses	297	269	870		803
Loss on business divestitures	161	0	164	[1]	0	[1]
Total operating expenses	5,070	4,978	14,982		14,828
Operating income	1,447	1,316	3,833		3,737
Other expense (income), net	300	(405)	378		(323)
Income from continuing operations before income taxes	1,147	1,721	3,455		4,060
Provision for income taxes	308	348	818		771
Income from continuing operations of consolidated group	839	1,373	2,637		3,289
Income from unconsolidated subsidiaries, net of taxes	2	3	51		7
Net income from continuing operations including noncontrolling interest	841	1,376	2,688		3,296
Less: net income attributable to noncontrolling interest	7	4	15		15
Net income from continuing operations attributable to 3M	834	1,372	2,673		3,281
Net income from discontinued operations, net of taxes	0	0	0		164
Net income attributable to 3M	$ 834	$ 1,372	$ 2,673		$ 3,445
Earnings per share attributable to 3M common shareholders:
Weighted average 3M common shares outstanding - basic (in shares)	534.1	550.6	538.4		553.1
Earnings per share from continuing operations — basic (in dollars per share)	$ 1.56	$ 2.49	$ 4.97		$ 5.93
Earnings per share from discontinued operations — basic (in dollars per share)	0	0	0		0.30
Earnings per share — basic (in dollars per share)	$ 1.56	$ 2.49	$ 4.97		$ 6.23
Weighted average 3M common shares outstanding - diluted (in shares)	538.1	552.7	542.1		554.5
Earnings per share from continuing operations — diluted (in dollars per share)	$ 1.55	$ 2.48	$ 4.93		$ 5.92
Earnings per share from discontinued operations — diluted (in dollars per share)	0	0	0		0.29
Earnings per share — diluted (in dollars per share)	$ 1.55	$ 2.48	$ 4.93		$ 6.21

[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.