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Contingencies (Antitrust Litigation and Shareholder Class Action and Shareholder Derivative Lawsuits) (Details) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 31, 2023 USD ($) | Apr. 30, 2023 USD ($) | Mar. 31, 2022 USD ($) | Jan. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Apr. 22, 2024 lawsuit | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Mar. 31, 2023 USD ($) | Nov. 30, 2020 complaint | Apr. 30, 2020
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency, number of complaints | complaint |  |  |  |  |  |  |  |  |  |  | 3 |
Litigation settlement |  |  | $ 90 |  |  |  |  |  |  |  |  |
Loss contingency accrual, provision |  |  |  |  |  | $ 90 |  |  |  |  |  |
Payments for legal settlements |  |  |  | $ 90 |  |  |  |  |  |  |  |
Pre-tax charge |  |  |  |  | $ 71 |  |  | $ 364 | $ 346 | $ 171 |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency, class action lawsuit | lawsuit |  |  |  |  |  |  | 17 |  |  |  |  |
Federal And State Shareholder Derivative Lawsuits [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency accrual, provision |  |  |  |  | $ 27 |  |  |  |  |  |  |
Loss contingency, settlement funding amount | $ 100 |  |  |  |  |  |  |  |  |  |  |
Judgments paid |  | $ 15 |  |  |  |  |  |  |  |  |  |
Pre-tax charge |  |  |  |  |  |  |  |  |  | $ 100 |  |
Loss contingency, settlement funding period | 5 years |  |  |  |  |  |  |  |  |  |  |
JUUL [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity securities, ownership percentage |  |  |  |  |  |  |  |  |  |  |  | 35.00%

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