Pensions Benefit Plans and Other Postretirement Benefits - Minimum Funding Requirements and Estimated Future Benefit Payments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure
Defined contribution plans for salaried and hourly U.S. employees	$ 33	$ 34	$ 29
U.S. Pension Plans
Estimated future benefit payments
2018	111
2019	112
2020	112
2021	109
2022	109
2023 - 2027	517
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure
Contribution to defined benefit plan in 2018	35
Estimated future benefit payments
2018	51
2019	47
2020	51
2021	53
2022	55
2023 - 2027	289
U.S Postretirement Benefit Plans
Estimated future benefit payments
2018	8
2019	7
2020	7
2021	7
2022	6
2023 - 2027	28
Non-U.S. Postretirement Benefit Plans
Estimated future benefit payments
2018	3
2019	3
2020	3
2021	4
2022	4
2023 - 2027	$ 20