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Stock Incentive Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
May 02, 2023 | Mar. 29, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Shares of common stock received for each restricted stock unit granted (in shares) |  |  | 1 |  |
Shares issued employee stock purchase plan (in shares) |  |  | 3,000,000 |  |
Average purchase price of shares purchased (in dollars per share) |  |  | $ 70.99 |  |
Restricted stock units and performance stock units |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Compensation not yet recognized, other than options |  |  | $ 790 |  |
Compensation not yet recognized, period for recognition |  |  | 2 years 1 month 6 days |  |
Vested in period, fair value |  |  | $ 525 | $ 328 | $ 406
Performance stock units |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Award vesting period |  |  | 3 years |  |
Employee Stock Option |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Award vesting period |  |  | 4 years |  |
Compensation not yet recognized, period for recognition |  |  | 2 years |  |
Compensation not yet recognized, options |  |  | $ 58 |  |
Expected to vest (in shares) |  |  | 7,000,000 |  |
Stock options granted through 2018 |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Expiration period |  |  | 7 years |  |
Stock options granted subsequent to 2018 |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Expiration period |  |  | 10 years |  |
Stock Appreciation Rights (SARs) |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Award vesting period |  |  | 3 years |  |
Expiration period |  |  | 10 years |  |
Employee Stock |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Number of shares authorized (in shares) |  |  | 60,000,000 |  |
Number of shares available for grant (in shares) |  |  | 26,000,000 |  |
Offering period |  |  | 6 months |  |
Purchase price of common stock percent |  |  | 90.00% |  |
Minimum |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Award vesting period |  |  | 3 years |  |
Maximum |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Award vesting period |  |  | 5 years |  |
Oak Street Health Inc. | Pre-combination services |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Replacement equity awards for pre-combination services (in shares) | 3,900,000 |  |  |  |
Signify Health, Inc. | Pre-combination services |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Replacement equity awards for pre-combination services (in shares) |  | 3,200,000 |  |  |
CVS Health 2017 Incentive Compensation Plan |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Number of shares authorized (in shares) |  |  | 58,000,000 |  |
Number of shares available for grant (in shares) |  |  | 11,000,000 |  |
Oak Street Health Plan |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Number of shares authorized (in shares) |  |  | 7,000,000 |  |
Signify Plan |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |
Number of shares authorized (in shares) |  |  | 9,000,000 |  |

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