Defined Benefit Postretirement Plans and Defined Contribution Plan (Details 6) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 20	$ 25	$ 27
Severance Costs		55
Scenario, Forecast [Member]
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 62
Severance Costs	8
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months		61
Defined Benefit Plan, Expected Future Benefit Payments, Year Two		61
Defined Benefit Plan, Expected Future Benefit Payments, Year Three		59
Defined Benefit Plan, Expected Future Benefit Payments, Year Four		55
Defined Benefit Plan, Expected Future Benefit Payments, Year Five		53
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter		224
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months		16
Defined Benefit Plan, Expected Future Benefit Payments, Year Two		17
Defined Benefit Plan, Expected Future Benefit Payments, Year Three		20
Defined Benefit Plan, Expected Future Benefit Payments, Year Four		21
Defined Benefit Plan, Expected Future Benefit Payments, Year Five		22
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter		125
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months		21
Defined Benefit Plan, Expected Future Benefit Payments, Year Two		21
Defined Benefit Plan, Expected Future Benefit Payments, Year Three		20
Defined Benefit Plan, Expected Future Benefit Payments, Year Four		20
Defined Benefit Plan, Expected Future Benefit Payments, Year Five		20
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter		$ 89
Other Postretirement Benefit Plans, Defined Benefit [Member] | Scenario, Forecast [Member]
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	21
Unfunded Plans [Member] | Scenario, Forecast [Member]
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 8