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Costs Associated with Rationalization Programs - Narrative (Details) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Mar. 18, 2019 facility position | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) employee | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of facilities affected | facility | 2 |  |  |  |  |
Expected number of positions eliminated | employee |  |  |  | 1,100 |  |
Rationalizations |  | $ 4 | $ (2) | $ 107 | $ 35 |
Rationalizations accrual balance |  | 155 |  | 155 |  | $ 81
Rationalization reversals |  |  | 7 | 2 | 12 |
Rationalization charges incurred to date |  |  |  |  |  | $ 720
Rationalization charges expected to be incurred in future periods |  | 45 |  | 45 |  |
Prior Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | 1 | (3) | $ 4 | 3 |
Number of positions eliminated | employee |  |  |  | 250 |  |
Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Expected number of positions eliminated | employee |  |  |  | 1,050 |  |
Rationalizations |  | 3 | 1 | $ 103 | 32 |
Number of positions eliminated | employee |  |  |  | 250 |  |
Modernizing Tire Manufacturing Facilities in Germany |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of facilities affected | facility | 2 |  |  |  |  |
Expected number of positions eliminated | position | 1,100 |  |  |  |  |
Modernizing Tire Manufacturing Facilities in Germany | Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | 1 |  | $ 94 |  |
Europe, Middle East, and Africa Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations accrual balance |  | 31 |  | 31 |  |
Europe, Middle East, and Africa Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency | Prior Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | 1 |  | 6 |  |
Employee Severance |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations accrual balance |  | 22 |  | 22 |  |
Employee Severance | Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  |  | 1 |  | 26 |
Americas Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations accrual balance |  | 5 |  | 5 |  |
Americas Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency | Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | $ 2 |  | $ 9 |  |
Europe, Middle East, and Africa Restructuring Plan - Operating Efficiency | Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  |  |  |  | 6 |
Philippsburg Restructuring | Prior Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  |  | $ 2 |  | $ 9 |
Amiens Restructuring Plan | Amiens Labor Claims |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Loss contingency, number of plaintiffs | employee |  |  |  | 850 |  |

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