Pension and Postretirement Expense Level 4 (Details) - Amounts Recognized - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	$ (34)	$ (49)
Other Liabilities, Current	(106)	(135)
Liability, Defined Benefit Plan, Noncurrent	(221)	(262)
Accumulated other comprehensive income	(18)	(8)	$ 39
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net Amounts Recognized in Accumulated Other Comprehensive Income	(1)	1	$ 3
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	0	0
Other Liabilities, Current	0	0
Liability, Defined Benefit Plan, Noncurrent	(31)	(25)
Accumulated other comprehensive income	0	0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(31)	(25)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	1	1
Deferred income taxes	(1)	(1)
Net Amounts Recognized in Accumulated Other Comprehensive Income	0	0
Defined Benefit Plan, Accumulated Benefit Obligation	216	238
Accumulated Benefit Obligation for Funded Plans	216	238
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	216	238
Pension Benefits Fair Value of Plan Assets of Underfunded Plans	185	213
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]
Aggregate Projected Benefit Obligation for Underfunded Pension Plans	216	238
Aggregate Projected Benefit Obligation for Underfunded Pension Plans	216	238
Aggregate Fair Value of Plan Assets for Underfunded Pension Plans	185	213
Pension plans with projected benefit obligation [Abstract]
Actuarial Gain from Plan Amendment	0	0
Pension Plan [Member] | Non-US [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	0	(1)
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other Liabilities, Current	(5)	(5)
Liability, Defined Benefit Plan, Noncurrent	(174)	(220)
Accumulated other comprehensive income	0	0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(179)	(224)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	(1)	(1)
Deferred income taxes	1	1
Net Amounts Recognized in Accumulated Other Comprehensive Income	0	0
Defined Benefit Plan, Accumulated Benefit Obligation	548	587
Accumulated Benefit Obligation for Funded Plans	380	393
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	181	567
Pension Benefits Fair Value of Plan Assets of Underfunded Plans	12	391
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]
Aggregate Projected Benefit Obligation for Underfunded Pension Plans	187	615
Aggregate Projected Benefit Obligation for Underfunded Pension Plans	584	615
Aggregate Fair Value of Plan Assets for Underfunded Pension Plans	403	391
Pension plans with projected benefit obligation [Abstract]
Actuarial Gain from Plan Amendment	0	2
Other Postretirement Benefits Plan [Member] | UNITED STATES
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	0	0
Other Liabilities, Current	0	0
Liability, Defined Benefit Plan, Noncurrent	0	(5)
Accumulated other comprehensive income	(2)	(2)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(2)	(7)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	0	0
Deferred income taxes	(2)	(2)
Net Amounts Recognized in Accumulated Other Comprehensive Income	(2)	(2)
Pension plans with projected benefit obligation [Abstract]
Actuarial Gain from Plan Amendment	(4)	0
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Other assets, net	0	0
Other Liabilities, Current	(1)	1
Liability, Defined Benefit Plan, Noncurrent	(12)	(10)
Accumulated other comprehensive income	0	1
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(13)	(10)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	1	2
Deferred income taxes	(1)	(1)
Net Amounts Recognized in Accumulated Other Comprehensive Income	0	1
Pension plans with projected benefit obligation [Abstract]
Actuarial Gain from Plan Amendment	$ 0	$ 0