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Pension and Postretirement Benefit Plans - Estimated Future Benefit Payments (Details)
$ in Millions
Dec. 31, 2016
USD ($)
United States Pension Plan of US Entity [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2017 $ 126
2018 120
2019 118
2020 114
2021 113
2022 to 2026 537
Total 1,128
Foreign Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2017 12
2018 14
2019 14
2020 15
2021 15
2022 to 2026 89
Total 159
Foreign Postretirement Benefit Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2017 4
2018 5
2019 5
2020 5
2021 5
2022 to 2026 26
Total $ 50