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Costs Associated with Rationalization Programs - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) employee | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations accrual balance |  | $ 234 |  | $ 234 |  | $ 219
Rationalization payments |  |  |  | 96 | $ 68 |
Rationalizations |  | 46 | $ 135 | 102 | 194 |
Rationalization reversals |  | 5 |  | 7 |  |
Rationalization charges incurred to date |  |  |  |  |  | $ 595
Rationalization charges expected to be incurred in future periods |  | 45 |  | $ 45 |  |
Expected number of job reductions | employee |  |  |  | 750 |  |
Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | 26 | 128 | $ 52 | 171 |
Expected number of job reductions | employee |  |  |  | 400 |  |
Number of associates released | employee |  |  |  | 100 |  |
Prior Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | 20 | 7 | $ 50 | 23 |
Number of associates released | employee |  |  |  | 1,100 |  |
Philippsburg Restructuring |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations accrual balance |  | 118 |  | $ 118 |  |
Philippsburg Restructuring | Prior Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | 9 |  | 29 |  |
SAG Employee Severance |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations accrual balance |  | 36 |  | 36 |  |
SAG Employee Severance | Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  |  |  | 20 |  |
SAG Employee Severance | Prior Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | 9 |  | 9 |  |
EMEA Restructuring, Manufacturing Employee Severance |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations accrual balance |  | 30 |  | 30 |  |
EMEA Restructuring, Manufacturing Employee Severance | Prior Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  |  |  | 9 |  |
EMEA Restructuring, SAG Employee Severance |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations accrual balance |  | 17 |  | 17 |  |
Global Reduction in Force | Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  | $ 25 |  | 25 |  |
Supply Chain Restructuring | Current Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  |  |  | $ 7 |  |
Amiens Restructuring | Prior Year Plans |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalizations |  |  | $ 2 |  | $ 11 |
Amiens Labor Claims | Amiens Restructuring |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Loss contingency, number of plaintiffs | employee |  |  |  | 850 |  |
Scenario, Forecast | Philippsburg Restructuring |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Rationalization payments | $ 65 |  |  |  |  |

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