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Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 204 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021
Loss Contingency Accrual [Roll Forward] |  |  |  |  |
Accrued liability for tobacco and health litigation items at beginning of period | $ 0 | $ 22 | $ 9 | $ 14 |
Payments | (8) | (47) | (60) | (81) |
Accrued liability for tobacco and health litigation items at end of period | 97 | 9 | 97 | 9 | $ 97
Related Interest Costs [Member] |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |
Provision related to litigation recorded | 6 | 0 | 6 | 3 |
Assets [Member] | Pending Litigation [Member] | PM USA [Member] |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |
Security posted for appeal of judgments | 45 |  | 45 |  | 45
Tobacco and Health Judgment [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Judgments paid (approximately) |  |  |  |  | 865
Litigation settlement interest expense (income) |  |  |  |  | 218
Tobacco and Health Judgment [Member] | Tobacco and Health and Certain Other Litigation [Member] |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |
Provision related to litigation recorded | $ 99 | $ 34 | $ 142 | $ 73 |
Engle Progeny Cases [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Judgments paid (approximately) |  |  |  |  | 410
Litigation settlement interest expense (income) |  |  |  |  | $ 56

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