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Segment Reporting (Schedule for Lump Sum Pension Payments) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning | $ 206 | $ 19 | $ (359) | $ 103 | $ (13,785) | $ 786 | $ (86) | $ 304 |
Pension [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | $ 81
Pension [Member] | Smokeable Products [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 57
Pension [Member] | Smokeless Products [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 16
Pension [Member] | Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 8
Pension [Member] | Cost of Sales [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 39
Pension [Member] | Cost of Sales [Member] | Smokeable Products [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 39
Pension [Member] | Cost of Sales [Member] | Smokeless Products [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 0
Pension [Member] | Cost of Sales [Member] | Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 0
Pension [Member] | Marketing, Adminstration and Research Costs [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 42
Pension [Member] | Marketing, Adminstration and Research Costs [Member] | Smokeable Products [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 18
Pension [Member] | Marketing, Adminstration and Research Costs [Member] | Smokeless Products [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | 16
Pension [Member] | Marketing, Adminstration and Research Costs [Member] | Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Pre-Tax Charges (Gain) Included in Net Earning |  |  |  |  |  |  |  |  | $ 8

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