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Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 177 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019
Loss Contingency Accrual [Roll Forward] |  |  |  |  |
Accrued liability for tobacco and health litigation items at beginning of period | $ 20 | $ 111 | $ 112 | $ 106 |
Payments | (35) | (74) | (144) | (97) |
Accrued liability for tobacco and health litigation items at end of period | 13 | 107 | 13 | 107 | $ 13
Interest Expense Related to Litigation [Member] |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |
Provision related to litigation recorded | 3 | 10 | 5 | 14 |
Tobacco and Health Judgment [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Judgments paid (approximately) |  |  |  |  | 698
Litigation settlement interest expense (income) |  |  |  |  | 214
Tobacco and Health Judgment [Member] | Litigation Cases Results [Member] |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |
Provision related to litigation recorded | 25 | $ 60 | 40 | $ 84 |
Engle Progeny Cases [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Judgments paid (approximately) |  |  |  |  | 306
Litigation settlement interest expense (income) |  |  |  |  | 52
Assets [Member] | Pending Litigation [Member] | PM USA [Member] |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |
Security posted for appeal of judgments | $ 40 |  | $ 40 |  | $ 40

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