Consolidated Statement of Income (Loss) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Net sales	$ 6,255	$ 6,283	$ 12,271	$ 12,338
Operating expenses
Cost of sales	3,571	3,728	7,056	7,472
Selling, general and administrative expenses	1,132	11,615	2,260	12,763
Research, development and related expenses	280	298	534	595
Total operating expenses	4,983	15,641	9,850	20,830
Operating income (loss)	1,272	(9,358)	2,421	(8,492)
Other expense (income), net	(138)	72	82	128
Income (loss) from continuing operations before income taxes	1,410	(9,430)	2,339	(8,620)
Provision (benefit) for income taxes	203	(2,261)	423	(2,116)
Income (loss) from continuing operations of consolidated group	1,207	(7,169)	1,916	(6,504)
Income (loss) from unconsolidated subsidiaries, net of taxes	3	3	4	5
Net income (loss) from continuing operations including noncontrolling interest	1,210	(7,166)	1,920	(6,499)
Less: Net income (loss) attributable to noncontrolling interest	6	5	11	10
Net income (loss) from continuing operations attributable to 3M	1,204	(7,171)	1,909	(6,509)
Net income (loss) from discontinued operations, net of taxes	(59)	330	164	644
Net income (loss) attributable to 3M	$ 1,145	$ (6,841)	$ 2,073	$ (5,865)
Weighted average 3M common shares outstanding - basic (in shares)	553.8	553.9	554.4	553.3
Earnings (loss) per share from continuing operations — basic (in dollars per share)	$ 2.17	$ (12.94)	$ 3.44	$ (11.76)
Earnings (loss) per share from discontinued operations — basic (in dollars per share)	(0.10)	0.59	0.30	1.16
Earnings (loss) per share — basic (in dollars per share)	$ 2.07	$ (12.35)	$ 3.74	$ (10.60)
Weighted average 3M common shares outstanding - diluted (in shares)	554.8	553.9	555.3	553.3
Earnings (loss) per share from continuing operations — diluted (in dollars per share)	$ 2.17	$ (12.94)	$ 3.44	$ (11.76)
Earnings (loss) per share from discontinued operations — diluted (in dollars per share)	(0.10)	0.59	0.29	1.16
Earnings (loss) per share — diluted (in dollars per share)	$ 2.07	$ (12.35)	$ 3.73	$ (10.60)