Earnings 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
Numerator for earnings per share calculation:
Net income attributable to CVS Health, basic	$ 87	$ 2,261	$ 2,970	$ 6,298
Net income attributable to CVS Health, diluted	$ 87	$ 2,261	$ 2,970	$ 6,298
Denominator for earnings per share calculation:
Weighted average shares, basic (in shares)	1,259	1,287	1,258	1,284
Weighted average shares, diluted (in shares)	1,259	1,290	1,262	1,289
Earnings per share:
Basic (in dollars per share)	$ 0.07	$ 1.76	$ 2.36	$ 4.90
Diluted (in dollars per share)	$ 0.07	$ 1.75	$ 2.35	$ 4.88
Restricted stock units and performance stock units
Denominator for earnings per share calculation:
Effect of dilutive securities (in shares)	0	2	3	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)	8	9	7	7
Denominator for earnings per share calculation:
Effect of dilutive securities (in shares)	0	1	1	2