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Employee Benefit Plans - Estimated Future Benefit Payments (Details)
$ in Millions
Dec. 31, 2016
USD ($)
Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2016 $ 173
2017 176
2018 179
2019 180
2020 182
2021 - 2025 933
U.S. Pension Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2016 124
2017 127
2018 130
2019 132
2020 135
2021 - 2025 690
International Pension Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2016 49
2017 49
2018 49
2019 48
2020 47
2021 - 2025 243
Postretirement Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2016 3
2017 3
2018 2
2019 2
2020 2
2021 - 2025 6
Postemployment Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2016 55
2017 20
2018 19
2019 17
2020 16
2021 - 2025 $ 65