Consolidated Statement of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025		Jun. 30, 2024
Income Statement [Abstract]
Net sales	$ 6,344	$ 6,255	$ 12,298		$ 12,271
Operating expenses
Cost of sales	3,646	3,571	7,124		7,056
Selling, general and administrative expenses	1,267	1,132	2,212		2,260
Research, development and related expenses	288	280	573		534
Loss on business divestitures	3	0	3	[1]	0	[1]
Total operating expenses	5,204	4,983	9,912		9,850
Operating income	1,140	1,272	2,386		2,421
Other expense (income), net	217	(138)	78		82
Income from continuing operations before income taxes	923	1,410	2,308		2,339
Provision for income taxes	245	203	510		423
Income from continuing operations of consolidated group	678	1,207	1,798		1,916
Income from unconsolidated subsidiaries, net of taxes	47	3	49		4
Net income from continuing operations including noncontrolling interest	725	1,210	1,847		1,920
Less: net income attributable to noncontrolling interest	2	6	8		11
Net income from continuing operations attributable to 3M	723	1,204	1,839		1,909
Net income (loss) from discontinued operations, net of taxes	0	(59)	0		164
Net income attributable to 3M	$ 723	$ 1,145	$ 1,839		$ 2,073
Earnings per share attributable to 3M common shareholders:
Weighted average 3M common shares outstanding - basic (in shares)	537.4	553.8	540.6		554.4
Earnings per share from continuing operations — basic (in dollars per share)	$ 1.35	$ 2.17	$ 3.40		$ 3.44
Earnings (loss) per share from discontinued operations — basic (in dollars per share)	0	(0.10)	0		0.30
Earnings per share — basic (in dollars per share)	$ 1.35	$ 2.07	$ 3.40		$ 3.74
Weighted average 3M common shares outstanding - diluted (in shares)	540.6	554.8	544.2		555.3
Earnings per share from continuing operations — diluted (in dollars per share)	$ 1.34	$ 2.17	$ 3.38		$ 3.44
Earnings (loss) per share from discontinued operations — diluted (in dollars per share)	0	(0.10)	0		0.29
Earnings per share — diluted (in dollars per share)	$ 1.34	$ 2.07	$ 3.38		$ 3.73

[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.