Change in Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 830	$ 582
Other Pension, Postretirement and Supplemental Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	1,116
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation Beginning Balance	990
Benefit Obligation Ending Balance		990
UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount	630	567	$ 647
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (208)	$ (193)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.34%	4.33%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation Beginning Balance	$ 760	$ 840
Service cost	0	0
Defined Benefit Plan, Interest Cost	30	27	29
Actuarial loss/(gain)	88	(63)
Special termination benefits	0	2	0
Foreign exchange translation	0	0
Benefits paid and other	(40)	(46)
Benefit Obligation Ending Balance		760	$ 840
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Actual return on plan assets	102	(35)
Sponsor contributions	1	1
Foreign exchange translation	0	0
Accumulated other comprehensive income/(Loss)	$ 78	$ 53
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Expected Return on Plan Assets	6.78%	6.74%	6.73%
Defined Benefit Plans Benefits Paid Other	$ 40	$ 46
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	(79)	(53)
Accumulated Other Comprehensive Income Pension and Other Postretirement Benefit Plans Tax	1	0
UNITED STATES | Other Noncurrent Assets [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Assets for Plan Benefits, Defined Benefit Plan	0	0
UNITED STATES | Accrued Employee Liabilities [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Liability, Defined Benefit Plan, Current	0	0
UNITED STATES | Employee Benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Liability, Defined Benefit Plan, Noncurrent	(208)	(193)
UNITED STATES | Continuing Operations [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount	630	567
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation Beginning Balance	760
Benefit Obligation Ending Balance	838	760
Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount	232	200	$ 220
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (68)	$ (50)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.39%	3.34%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation Beginning Balance		$ 281
Service cost	$ 2	2	2
Defined Benefit Plan, Interest Cost	8	8	9
Actuarial loss/(gain)	40	(17)
Special termination benefits	1	0	2
Foreign exchange translation	4	(16)
Benefits paid and other	(5)	(8)
Benefit Obligation Ending Balance			$ 281
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Actual return on plan assets	26	(5)
Sponsor contributions	7	7
Foreign exchange translation	4	(14)
Accumulated other comprehensive income/(Loss)	$ 36	$ 18
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Expected Return on Plan Assets	4.73%	4.86%	5.24%
Defined Benefit Plans Benefits Paid Other	$ 5	$ 8
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	(50)	(27)
Accumulated Other Comprehensive Income Pension and Other Postretirement Benefit Plans Tax	$ 14	$ 9
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.16%	3.51%
Foreign Plan [Member] | Other Noncurrent Assets [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Assets for Plan Benefits, Defined Benefit Plan	$ 3	$ 4
Foreign Plan [Member] | Accrued Employee Liabilities [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Liability, Defined Benefit Plan, Current	(2)	(1)
Foreign Plan [Member] | Employee Benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Liability, Defined Benefit Plan, Noncurrent	(69)	(53)
Foreign Plan [Member] | Continuing Operations [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Amount	232	200
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation Beginning Balance	250	250
Benefit Obligation Ending Balance	$ 300	$ 250	$ 250