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Commitments and Contingencies (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2022 USD ($) state lease | Aug. 31, 2022 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) state lease | Sep. 30, 2022 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) state lease | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2020 claim
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Guarantor obligations, maximum exposure | $ 250 |  |  | $ 250 |  |  |  | $ 250 |  |  |
Contractual obligations underlying the guaranteed benefits | $ 941 |  |  | $ 941 |  |  |  | $ 941 | $ 1,300 |  |
Guarantor obligations, number of leases | lease | 67 |  |  | 67 |  |  |  | 67 |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Opioid litigation charges |  |  |  |  |  |  |  | $ 5,803 | $ 0 | $ 0 |
Number of states subject to earlier settlements | state | 3 |  |  | 3 |  |  |  | 3 |  |  |
Federal Court in Ohio Judgment | Pending Litigation |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Legal settlement awarded to other party |  | $ 651 |  |  |  |  |  |  |  |  |
Legal settlement, period of payment |  | 15 years |  |  |  |  |  |  |  |  |
State of Florida Settlement |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Legal settlement, period of payment |  |  | 18 years |  |  |  |  |  |  |  |
Opioid litigation charges |  |  | $ 484 |  |  |  |  |  |  |  |
Liability recorded in association with legal settlement |  |  | $ 484 |  |  |  |  |  |  |  |
Settlement Framework |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Legal settlement awarded to other party | $ 4,300 |  |  |  |  |  |  |  |  |  |
Legal settlement, period of payment | 10 years |  |  | 10 years |  |  |  | 10 years |  |  |
Attorneys' fees and costs | $ 625 |  |  |  |  |  |  |  |  |  |
Number of states that elected to join the settlement | state | 45 |  |  | 45 |  |  |  | 45 |  |  |
Settlement Framework | Tribal Entities |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Legal settlement awarded to other party | $ 113 |  |  |  |  |  |  |  |  |  |
Legal settlement, period of payment | 10 years |  |  | 10 years |  |  |  | 10 years |  |  |
Attorneys' fees and costs | $ 18 |  |  |  |  |  |  |  |  |  |
Settlement Framework and Other Opioid-Related Claims |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Opioid litigation charges |  |  |  | $ 99 | $ 5,200 |  |  |  |  |  |
Long-term liability recorded in association with legal settlement | $ 4,800 |  |  | $ 4,800 |  |  |  | $ 4,800 |  |  |
Settlement Framework and Other Opioid-Related Claims | Maximum | Forecast |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash impact of litigation settlement |  |  |  |  |  | $ 500 | $ 500 |  |  |  |
Radcliff and Flaim v Aetna Inc., et al | Pending Litigation |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of claims | claim |  |  |  |  |  |  |  |  |  |  | 2

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