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Contingencies (Antitrust Litigation and Shareholder Class Action and Shareholder Derivative Lawsuits) (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 7 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2023 USD ($) | Feb. 28, 2022 claim | Jan. 31, 2022 USD ($) | Apr. 30, 2021 claim | Aug. 31, 2020 shareholder | Dec. 31, 2019 shareholder | Oct. 31, 2019 shareholder | Dec. 31, 2021 USD ($) | Mar. 31, 2021 shareholder | Jan. 31, 2022 contract | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Aug. 31, 2021 shareholder | Apr. 24, 2023 lawsuit | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) | Nov. 30, 2020 complaint | Apr. 30, 2020
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency, number of complaints | complaint |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |
Number of plaintiffs | claim |  | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency, number of shareholders filing class action lawsuits | shareholder |  |  |  |  | 2 | 2 | 2 |  |  |  |  |  |  |  |  |  |  |
Litigation settlement |  |  |  |  |  |  |  | $ 90 |  |  |  |  |  |  |  |  |  |
Loss contingency accrual, provision |  |  |  |  |  |  |  |  |  |  |  | $ 90 |  |  |  |  |  |
Payments for legal settlements |  |  | $ 90 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency, number of pending cases consolidated |  |  |  | 5 |  |  |  |  |  | 5 |  |  |  |  |  |  |  |
Loss contingency, number of shareholders filing derivative lawsuits | shareholder |  |  |  |  |  |  |  |  | 3 |  |  |  | 6 |  |  |  |  |
Pre-tax charge |  |  |  |  |  |  |  | $ 91 |  |  | $ 71 | $ 91 |  |  | $ 171 | $ 0 |  |
Federal And State Shareholder Derivative Lawsuits [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency accrual, provision |  |  |  |  |  |  |  |  |  |  | $ 27 |  |  |  |  |  |  |
Pre-tax charge |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100 |  |  |
JUUL [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35.00%
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency, class action lawsuit | lawsuit |  |  |  |  |  |  |  |  |  |  |  |  |  | 17 |  |  |  |
Subsequent Event [Member] | Federal And State Shareholder Derivative Lawsuits [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Judgments paid (approximately) | $ 15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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