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Earnings (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share [Abstract]        
Options outstanding not included in computation of diluted earnings per share (in shares) 31.1 35.6 32.3 36.0
Numerator:        
Net income (loss) from continuing operations attributable to 3M $ 1,372 $ (2,527) $ 3,281 $ (9,036)
Net income (loss) from discontinued operations, net of taxes 0 452 164 1,096
Net income (loss) attributable to 3M $ 1,372 $ (2,075) $ 3,445 $ (7,940)
Denominator:        
Denominator for weighted average 3M common shares outstanding - basic (in shares) 550.6 554.3 553.1 553.7
Dilution associated with stock-based compensation plans (in shares) 2.1 0.0 1.4 0.0
Denominator for weighted average 3M common shares outstanding – diluted (in shares) 552.7 554.3 554.5 553.7
Earnings (loss) per share from continuing operations — basic (in dollars per share) $ 2.49 $ (4.56) $ 5.93 $ (16.32)
Earnings (loss) per share from discontinued operations — basic (in dollars per share) 0 0.82 0.30 1.98
Earnings (loss) per share — basic (in dollars per share) 2.49 (3.74) 6.23 (14.34)
Earnings (loss) per share from continuing operations — diluted (in dollars per share) 2.48 (4.56) 5.92 (16.32)
Earnings (loss) per share from discontinued operations — diluted (in dollars per share) 0 0.82 0.29 1.98
Earnings (loss) per share — diluted (in dollars per share) $ 2.48 $ (3.74) $ 6.21 $ (14.34)