Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator for earnings per share calculation:
Net income attributable to CVS Health, basic	$ 1,113	$ 2,136
Net income attributable to CVS Health, diluted	$ 1,113	$ 2,136
Denominator for earnings per share calculation:
Weighted average shares, basic (in shares)	1,260	1,283
Weighted average shares, diluted (in shares)	1,267	1,291
Earnings per share:
Basic (in dollars per share)	$ 0.88	$ 1.66
Diluted (in dollars per share)	$ 0.88	$ 1.65
Restricted stock units and performance stock units
Denominator for earnings per share calculation:
Effect of dilutive securities (in shares)	5	5
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)	6	4
Denominator for earnings per share calculation:
Effect of dilutive securities (in shares)	2	3