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Pension and Postretirement Benefit Plans - Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates (Details) - Foreign Postretirement Benefit Plan [Member]
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Effect on total of service and interest cost components one percentage point increase $ 1
Effect on OPEB obligations one percentage point increase 10
Effect on total of service and interest cost components one percentage point decrease (1)
Effect on OPEB obligations one percentage point decrease $ (9)