Pension and Postretirement Expense Level 4 (Details) - Change in Benefit Obligations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 249	$ 281
Service cost	3	3	$ 3
Interest cost	8	10	11
Actuarial (gains) losses	5	(20)
Foreign currency exchange rate changes	0	0
Benefits paid	(20)	(22)
Plan amendments	0	0
Expenses paid from assets	0	(3)
Employee contributions	0	0
Defined Benefit Plan, Other Costs	(3)	0
Benefit obligation at end of year	242	249	281
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Actual return on plan assets	17	(4)
Foreign currency exchange rate changes	0	0
Employer contributions	3	9
Funded status of the plan at end of year	(35)	(39)
Defined Benefit Plan, Fair Value of Plan Assets	207	210	230
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	492	564
Service cost	14	16	14
Interest cost	10	12	17
Actuarial (gains) losses	57	(31)
Foreign currency exchange rate changes	(13)	(61)
Benefits paid	(10)	(9)
Plan amendments	0	0
Expenses paid from assets	0	0
Employee contributions	1	1
Defined Benefit Plan, Other Costs	0	0
Benefit obligation at end of year	548	492	564
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Actual return on plan assets	33	(4)
Foreign currency exchange rate changes	(10)	(37)
Employer contributions	19	14
Funded status of the plan at end of year	(199)	(176)
Defined Benefit Plan, Fair Value of Plan Assets	349	316	351
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	7	9
Service cost	0	0	0
Interest cost	0	0	1
Actuarial (gains) losses	0	0
Foreign currency exchange rate changes	0	0
Benefits paid	(1)	(1)
Plan amendments	0	(1)
Expenses paid from assets	0	0
Employee contributions	0	0
Defined Benefit Plan, Other Costs	0	0
Benefit obligation at end of year	6	7	9
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Actual return on plan assets	0	0
Foreign currency exchange rate changes	0	0
Employer contributions	1	1
Funded status of the plan at end of year	(6)	(7)
Defined Benefit Plan, Fair Value of Plan Assets	0	0	0
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	9	11
Service cost	0	0	0
Interest cost	1	1	1
Actuarial (gains) losses	(1)	(1)
Foreign currency exchange rate changes	1	(2)
Benefits paid	0	0
Plan amendments	0	0
Expenses paid from assets	0	0
Employee contributions	0	0
Defined Benefit Plan, Other Costs	0	0
Benefit obligation at end of year	10	9	11
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Actual return on plan assets	0	0
Foreign currency exchange rate changes	0	0
Employer contributions	0	0
Funded status of the plan at end of year	(10)	(9)
Defined Benefit Plan, Fair Value of Plan Assets	$ 0	$ 0	$ 0