Defined Benefit Postretirement Plans and Defined Contribution Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 386	$ 518
Change in benefit obligations:
Benefit obligations at January 1	525	894
Service cost	25	29
Interest cost	16	25
Plan amendment	0	(88)
Actuarial loss	78	26
Foreign currency exchange rate changes	0	0
Divestiture	0	0
Liability (gain)/loss due to curtailment	0	(18)
Settlements paid	(240)	(335)
Benefits paid	(7)	(8)
Benefit obligations at December 31	397	525
Change in plan assets:
Fair value of plan assets at January 1	354	574
Actual return on plan assets	25	8
Employer contributions	95	115
Foreign currency exchange rate changes	0	0
Divestiture	0	0
Settlements paid	(240)	(335)
Benefits paid	(7)	(8)
Fair value of plan assets at December 31	227	354
Funded status of plans at December 31
Funded status of plans at December 31	(170)	(171)
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	0	0
Amounts recognized in the consolidated balance sheet:
Current liabilities	(4)	(8)
Noncurrent liabilities	(166)	(163)
Accrued benefit cost	(170)	(171)
Pretax amounts in accumulated other comprehensive loss:
Net loss	130	171
Prior service cost (credit)	(55)	(65)
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	583	579
Change in benefit obligations:
Benefit obligations at January 1	579	651
Service cost	0	14
Interest cost	23	25
Plan amendment	1	1
Actuarial loss	139	(29)
Foreign currency exchange rate changes	(108)	(35)
Divestiture	0	0
Liability (gain)/loss due to curtailment	0	(23)
Settlements paid	(36)	0
Benefits paid	(15)	(25)
Benefit obligations at December 31	583	579
Change in plan assets:
Fair value of plan assets at January 1	608	622
Actual return on plan assets	129	8
Employer contributions	18	36
Foreign currency exchange rate changes	(109)	(33)
Divestiture	0	0
Settlements paid	(36)	0
Benefits paid	(15)	(25)
Fair value of plan assets at December 31	595	608
Funded status of plans at December 31
Funded status of plans at December 31	12	29
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	12	29
Amounts recognized in the consolidated balance sheet:
Current liabilities	0	0
Noncurrent liabilities	0	0
Accrued benefit cost	12	29
Pretax amounts in accumulated other comprehensive loss:
Net loss	81	61
Prior service cost (credit)	4	4
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Amendments	19
Defined Benefit Plan, Accumulated Benefit Obligation	227	260
Change in benefit obligations:
Benefit obligations at January 1	260	279
Service cost	2	3
Interest cost	11	11
Plan amendment	(38)	0
Actuarial loss	11	(20)
Foreign currency exchange rate changes	0	0
Divestiture	0	0
Liability (gain)/loss due to curtailment	0	2
Settlements paid	0	0
Benefits paid	(20)	(15)
Benefit obligations at December 31	227	260
Change in plan assets:
Fair value of plan assets at January 1	0	0
Actual return on plan assets	0	0
Employer contributions	20	15
Foreign currency exchange rate changes	0	0
Divestiture	0	0
Settlements paid	0	0
Benefits paid	(20)	(15)
Fair value of plan assets at December 31	0	0
Funded status of plans at December 31
Funded status of plans at December 31	(227)	(260)
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	0	0
Amounts recognized in the consolidated balance sheet:
Current liabilities	(21)	(20)
Noncurrent liabilities	(206)	(240)
Accrued benefit cost	(227)	(260)
Pretax amounts in accumulated other comprehensive loss:
Net loss	25	14
Prior service cost (credit)	$ (63)	$ (28)