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Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 153 Months Ended
--- | --- | --- | --- | --- | ---
May 31, 2016 | May 31, 2001 | Jun. 30, 2017 | Jun. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2017
Loss Contingency Accrual [Roll Forward] |  |  |  |  |  |  |  |  |
Accrued liability for tobacco and health litigation items at beginning of period |  |  | $ 47 | $ 153 | $ 132 | $ 47 | $ 132 |  |
Payments |  |  | (17) | (128) |  | (18) | (145) |  |
Accrued liability for tobacco and health litigation items at end of period |  |  | 47 | 30 | 153 | 47 | 30 | $ 132 | $ 47
Aspinall [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Litigation settlement interest expense (income) (approximately) |  |  |  |  |  |  | 10 |  |
Interest Expense Related To Litigation [Member] |  |  |  |  |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |  |  |  |  |
Pre-tax charges |  |  | 2 | 4 |  | 2 | 6 |  |
Tobacco and Health Judgment [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Judgments paid (approximately) |  |  |  |  |  |  |  |  | 490
Litigation settlement interest expense (income) (approximately) |  |  |  |  |  |  |  |  | 184
Tobacco and Health Judgment [Member] | Litigation Cases Results [Member] |  |  |  |  |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |  |  |  |  |
Pre-tax charges |  |  | 15 | 1 |  | 16 | 5 |  |
Aspinall [Member] |  |  |  |  |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |  |  |  |  |
Payments | $ (32) |  |  |  |  |  |  |  |
Aspinall [Member] | Litigation Cases Results [Member] |  |  |  |  |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |  |  |  |  |
Pre-tax charges |  |  | 0 | $ 0 |  | 0 | $ 32 |  |
Engle Progeny Cases [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Judgments paid (approximately) |  |  |  |  |  |  |  |  | 99
Litigation settlement interest expense (income) (approximately) |  |  |  |  |  |  |  |  | 22
PM USA [Member] | Aspinall [Member] |  |  |  |  |  |  |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |  |  |  |  |  |  |
Pre-tax charges |  |  |  |  | $ 32 |  |  |  |
PM USA [Member] | Engle Progeny Cases [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Payments made (approximately) |  | $ 500 |  |  |  |  |  |  |
PM USA [Member] | Engle Progeny Cases, Federal [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Payments made (approximately) |  |  |  |  |  |  |  | $ 43 | 43
Other Assets [Member] | Pending Litigation [Member] | PM USA [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Security posted for appeal of judgments (approximately) |  |  | $ 79 |  |  | $ 79 |  |  | $ 79

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