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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Numerator for earnings per share calculation:        
Net income attributable to CVS Health, basic $ 1,021 $ 1,770 $ 2,800 $ 2,883
Net income attributable to CVS Health, diluted $ 1,021 $ 1,770 $ 2,800 $ 2,883
Denominator for earnings per share calculation:        
Weighted average shares, basic (in shares) 1,266 1,256 1,264 1,258
Weighted average shares, diluted (in shares) 1,270 1,259 1,267 1,263
Earnings per share:        
Basic (in dollars per share) $ 0.81 $ 1.41 $ 2.22 $ 2.29
Diluted (in dollars per share) $ 0.80 $ 1.41 $ 2.21 $ 2.28
Restricted stock units and performance stock units        
Denominator for earnings per share calculation:        
Effect of dilutive securities (in shares) 2 1 2 3
Stock options and stock appreciation rights        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of EPS (in shares) 9 7 10 7
Denominator for earnings per share calculation:        
Effect of dilutive securities (in shares) 2 2 1 2