Pensions Net Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Net Periodic Benefit Cost (Income) [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible List]	us-gaap:OtherNonoperatingIncomeExpense
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible List]	us-gaap:OtherNonoperatingIncomeExpense
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible List]	us-gaap:OtherNonoperatingIncomeExpense
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible List]	us-gaap:OtherNonoperatingIncomeExpense
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement and Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible List]	us-gaap:OtherNonoperatingIncomeExpense
Pension Plans, Defined Benefit [Member] | United States
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost (Income) [Abstract]
Discount rate	4.22%	3.54%	4.06%
Expected long-term rate of return on assets	5.76%	5.75%	6.50%
Components of Net Periodic Benefit Cost (Income) [Abstract]
Interest cost on benefit obligation	$ 45	$ 41	$ 43
Expected return on plan assets	(55)	(55)	(56)
Amortization of actuarial net loss	2	3	2
Settlement/curtailment loss			1
Net periodic benefit cost (income)	$ (8)	$ (11)	$ (10)
Pension Plans, Defined Benefit [Member] | Foreign Plan [Member]
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost (Income) [Abstract]
Discount rate	2.34%	2.10%	1.95%
Average rate of increase in employee compensation	2.47%	2.59%	3.10%
Expected long-term rate of return on assets	3.25%	3.31%	3.11%
Components of Net Periodic Benefit Cost (Income) [Abstract]
Service cost-benefits earned	$ 23	$ 26	$ 26
Interest cost on benefit obligation	24	23	21
Expected return on plan assets	(30)	(32)	(29)
Amortization of actuarial net loss	6	7	9
Amortization of prior service benefit	(1)
Settlement/curtailment loss	4	7	5
Net periodic benefit cost (income)	26	31	$ 32
Postretirement Benefits [Member]
Components of Net Periodic Benefit Cost (Income) [Abstract]
Service cost-benefits earned	1	1
Interest cost on benefit obligation	$ 2	$ 2