Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 8,619	$ 8,942	$ 26,150	$ 26,743
Operating expenses
Cost of sales	4,728	4,853	14,647	14,097
Selling, general and administrative expenses	1,998	1,819	6,903	5,373
Research, development and related expenses	461	482	1,417	1,520
Gain on business divestitures	(2,724)	0	(2,724)	0
Total operating expenses	4,463	7,154	20,243	20,990
Operating income	4,156	1,788	5,907	5,753
Other expense (income), net	24	31	112	113
Income before income taxes	4,132	1,757	5,795	5,640
Provision for income taxes	271	324	550	1,058
Income of consolidated group	3,861	1,433	5,245	4,582
Income (loss) from unconsolidated subsidiaries, net of taxes	2	4	3	7
Net income including noncontrolling interest	3,863	1,437	5,248	4,589
Less: Net income (loss) attributable to noncontrolling interest	4	3	12	7
Net income attributable to 3M	$ 3,859	$ 1,434	$ 5,236	$ 4,582
Weighted average 3M common shares outstanding - basic (in shares)	568.8	579.6	570.7	580.3
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 6.79	$ 2.47	$ 9.18	$ 7.90
Weighted average 3M common shares outstanding - diluted (in shares)	570.0	586.3	572.6	587.1
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 6.77	$ 2.45	$ 9.15	$ 7.81