Long-term Employee Benefits (Schedule of Net Periodic Pension (Cost) Income and Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Total net periodic pension (cost) income			$ (4)	$ 7
Net loss, pre-tax			(3)	0
Prior service benefit			(5)	0
Amortization of prior service gain, pre- tax	$ (1)	$ 0	(2)	(1)
Amortization of actuarial loss, pre-tax	6	4	18	11
Effect of foreign exchange rates, pre-tax	9	(2)	10	3
Benefit recognized in other comprehensive income	17	4	32	15
Pension Plan [Member] | Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	(3)	(4)	(9)	(11)
Interest cost	(4)	(4)	(13)	(13)
Expected return on plan assets	12	14	38	43
Amortization of actuarial loss	(6)	(4)	(18)	(12)
Amortization of prior service gain	1		2	2
Settlement loss	(3)	(2)	(4)	(2)
Total net periodic pension (cost) income	(3)		(4)	7
Net loss, pre-tax			(3)
Prior service benefit			5
Amortization of prior service gain, pre- tax	(1)		(2)	(1)
Amortization of actuarial loss, pre-tax	6	4	18	11
Settlement loss	3	2	4	2
Effect of foreign exchange rates, pre-tax	9	(2)	10	3
Benefit recognized in other comprehensive income	17	4	32	15
Total changes in plan assets and benefit obligations recognized in other comprehensive income	$ 14	$ 4	$ 28	$ 22