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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Earnings Per Share [Abstract]    
Options outstanding not included in computation of diluted earnings per share (in shares) 14.6 32.8
Numerator:    
Net income from continuing operations attributable to 3M $ 1,116 $ 705
Net income from discontinued operations, net of taxes 0 223
Net income attributable to 3M $ 1,116 $ 928
Denominator:    
Denominator for weighted average 3M common shares outstanding - basic (in shares) 543.8 555.0
Dilution associated with stock-based compensation plans (in shares) 3.9 0.9
Denominator for weighted average 3M common shares outstanding – diluted (in shares) 547.7 555.9
Earnings per share attributable to 3M common shareholders:    
Earnings per share from continuing operations — basic (in dollars per share) $ 2.05 $ 1.27
Earnings per share from discontinued operations — basic (in dollars per share) 0 0.40
Earnings per share — basic (in dollars per share) 2.05 1.67
Earnings per share from continuing operations — diluted (in dollars per share) 2.04 1.27
Earnings per share from discontinued operations — diluted (in dollars per share) 0 0.40
Earnings per share — diluted (in dollars per share) $ 2.04 $ 1.67