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Significant Accounting Policies - Narrative (Details) shares in Millions, people in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2023 state | Oct. 31, 2020 USD ($) | Dec. 31, 2022 USD ($) people store clinic patient state shares | Dec. 31, 2021 USD ($) store shares | Sep. 30, 2021 USD ($) | Dec. 31, 2022 USD ($) state people store clinic patient Segment shares | Dec. 31, 2021 USD ($) store shares | Dec. 31, 2020 USD ($) shares | Aug. 31, 2019 USD ($)
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Number of pharmacy plan members | people |  |  | 110 |  |  | 110 |  |  |
Number of patients served per year (more than) | patient |  |  | 1,000,000 |  |  | 1,000,000 |  |  |
Number of people served | people |  |  | 35 |  |  | 35 |  |  |
Number of reportable segments | Segment |  |  |  |  |  | 4 |  |  |
Deferred acquisition costs |  |  | $ 1,219,000,000 | $ 879,000,000 |  | $ 1,219,000,000 | $ 879,000,000 | $ 519,000,000 |
Depreciation |  |  |  |  |  | 2,400,000,000 | 2,300,000,000 | 2,100,000,000 |
Office real estate optimization charges |  |  | 117,000,000 |  |  | 117,000,000 | 0 | 0 |
Store impairment charges |  |  |  |  |  | 0 | $ 1,358,000,000 | 0 |
Number of stores, planned closure | store |  |  |  |  |  |  | 900 |  |
Goodwill impairment |  |  |  |  |  | 0 | $ 431,000,000 | 0 |
Impairment of intangible assets, indefinite-lived |  |  |  |  |  | 0 | 0 | 0 |
HSA balances |  |  | 0 | 2,900,000,000 |  | 0 | 2,900,000,000 |  |
Self insurance liabilities |  |  | $ 1,100,000,000 | $ 1,100,000,000 |  | $ 1,100,000,000 | 1,100,000,000 |  |
Pharmacy rebate period |  |  |  |  |  | 30 days |  |  |
Health insurer fee |  |  |  |  |  | $ 0 | 0 | 1,000,000,000 |
Advertising costs |  |  |  |  |  | $ 745,000,000 | $ 707,000,000 | $ 613,000,000 |
Treasury shares held in trust (in shares) | shares |  |  | 1 | 1 |  | 1 | 1 | 1 |
Expenses from transactions with related party |  |  |  |  |  | $ 60,000,000 | $ 52,000,000 | $ 56,000,000 |
Other revenues from transactions with related party |  |  |  |  |  | 87,000,000 | 79,000,000 | 77,000,000 |
Charitable contribution to CVS Health Foundation |  |  |  |  |  | $ 25,000,000 | 50,000,000 | 50,000,000 |
Long-Term Care Reporting Unit |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  | $ 431,000,000 |  |  |  |
U.S. Department of Health and Human Services, ACA Risk Corridor Receivables | Settled Litigation |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Gain contingency, unrecorded amount |  |  |  |  |  |  |  | 313,000,000 | $ 313,000,000
Amount awarded from other party |  | $ 313,000,000 |  |  |  |  |  |  |
Former gain contingency, recognized in current period, before tax |  |  |  |  |  |  |  | 307,000,000 |
Former gain contingency, recognized in current period, net of tax |  |  |  |  |  |  |  | 223,000,000 |
Heartland Healthcare Services |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Number of states in which entity operates | state |  |  | 4 |  |  | 4 |  |  |
Other Insurance Liabilities |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Liability for unpaid claims |  |  | $ 243,000,000 | $ 324,000,000 |  | $ 243,000,000 | 324,000,000 |  |
Liability for future policy benefits |  |  | 334,000,000 | 458,000,000 |  | 334,000,000 | 458,000,000 |  |
Other Long-Term Insurance Liabilities |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Liability for unpaid claims |  |  | 1,100,000,000 | 1,300,000,000 |  | 1,100,000,000 | 1,300,000,000 |  |
Liability for future policy benefits |  |  | 4,700,000,000 | 6,000,000,000 |  | $ 4,700,000,000 | $ 6,000,000,000 |  |
Property and equipment |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Office real estate optimization charges |  |  | $ 44,000,000 |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Period after date of service a claim is paid |  |  |  |  |  | 6 months |  |  |
Interest rate for pension and annuity investment contracts |  |  |  |  |  | 3.50% | 3.50% |  |
Award vesting period |  |  |  |  |  | 3 years |  |  |
Minimum | Buildings, building improvements and leasehold improvements |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property plant and equipment |  |  |  |  |  | 1 year |  |  |
Minimum | Fixtures, equipment and internally developed software |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property plant and equipment |  |  |  |  |  | 3 years |  |  |
Maximum |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Lease renewal term |  |  |  |  |  | 5 years |  |  |
Period after date of service a claim is paid |  |  |  |  |  | 48 months |  |  |
Interest rate for pension and annuity investment contracts |  |  |  |  |  | 4.80% | 4.80% |  |
Award vesting period |  |  |  |  |  | 5 years |  |  |
Maximum | Buildings, building improvements and leasehold improvements |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property plant and equipment |  |  |  |  |  | 40 years |  |  |
Maximum | Fixtures, equipment and internally developed software |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Useful life of property plant and equipment |  |  |  |  |  | 10 years |  |  |
Pharmacy & Consumer Wellness |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Number of retail locations (more than) | store |  |  | 9,000 |  |  | 9,000 |  |  |
Goodwill impairment |  |  |  |  |  |  | $ 431,000,000 |  |
Health Services |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Number of walk-in medical clinics (more than) | clinic |  |  | 1,100 |  |  | 1,100 |  |  |
Goodwill impairment |  |  |  |  |  |  | 0 |  |
Health Care Benefits |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Number of states in which the Company has entered the individual public health insurance exchange | state |  |  |  |  |  | 8 |  |  |
Goodwill impairment |  |  |  |  |  |  | 0 |  |
Health Care Benefits | Forecast |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Additional number of states in which the Company entered the individual public health insurance exchange | state | 4 |  |  |  |  |  |  |  |
Retail LTC |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Store impairment charges |  |  |  | $ 1,400,000,000 |  |  | $ 1,400,000,000 |  |
Number of stores, planned closure | store |  |  |  | 900 |  |  | 900 |  |
Retail LTC | Property and equipment |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Store impairment charges |  |  |  | $ 261,000,000 |  |  | $ 261,000,000 |  |
Health Insurance Product Line |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Premium deficiency reserve |  |  | $ 0 | $ 16,000,000 |  | $ 0 | $ 16,000,000 | $ 11,000,000 |

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