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Commitments and Contingent Liabilities - Narrative (Details) € in Millions, $ in Millions | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2017 EUR (€) employee | Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Environmental matters liability |  | $ 52 | $ 55 |
Workers' compensation liability |  | 252 | 248 |
Off-balance sheet financial guarantees written and other commitments |  | 39 | 40 |
Workers' Compensation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Potential workers' compensation liability in excess of recorded amount |  | 30 |  |
Amiens Labor Claims |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Wrongful termination or other claims against company | € 119 | 140 |  |
Amiens Labor Claims | Amiens Restructuring |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency, number of plaintiffs | employee | 850 |  |  |
Insurance Claims |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Guarantor obligations, maximum exposure |  | 38 |  | $ 46
Other Current Liabilities |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental matters liability, current |  | 18 | 21 |
Compensation and Benefits |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Workers' compensation liability, current |  | $ 46 | $ 48 |

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