Long-term Employee Benefits - Schedule of Assumptions Used (Details) - Pension Plan [Member]	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Discount rate to determine benefit obligation	2.27%	2.13%	2.52%
Discount rate to determine net cost	2.13%	2.52%	3.05%
Rate of future compensation increases to determine benefit obligation	2.68%	2.69%	3.07%
Rate of future compensation increases to determine net cost	2.69%	3.07%	3.03%
Rate of return on plan assets to determine net cost	4.47%	4.73%	4.75%