Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator for earnings per share calculation:
Net income attributable to CVS Health	$ 2,951	$ 2,783	$ 5,263	$ 5,006
Denominator for earnings per share calculation:
Weighted average shares, basic (in shares)	1,313	1,319	1,312	1,316
Weighted average diluted shares outstanding (in shares)	1,321	1,327	1,325	1,325
Earnings per share:
Earnings per share, basic (in dollars per share)	$ 2.25	$ 2.11	$ 4.01	$ 3.80
Earnings per share, diluted (in dollars per share)	$ 2.23	$ 2.10	$ 3.97	$ 3.78
Restricted stock units and performance stock units
Denominator for earnings per share calculation:
Effect of dilutive securities (in shares)	4	4	8	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)	4	8	3	9
Denominator for earnings per share calculation:
Effect of dilutive securities (in shares)	4	4	5	3