Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator for earnings per share calculation:
Net income attributable to CVS Health	$ 2,312	$ 2,223
Denominator for earnings per share calculation:
Weighted average shares, basic (in shares)	1,312	1,313
Weighted average diluted shares outstanding (in shares)	1,328	1,322
Earnings per share:
Earnings per share, basic (in dollars per share)	$ 1.76	$ 1.69
Earnings per share, diluted (in dollars per share)	$ 1.74	$ 1.68
Restricted stock units and performance stock units
Denominator for earnings per share calculation:
Effect of dilutive securities (in shares)	10	6
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)	2	10
Denominator for earnings per share calculation:
Effect of dilutive securities (in shares)	6	3