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Long-term Employee Benefits - Schedule of Allocation of Plan Assets (Details) - Pension Plan [Member]	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Minimum [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	15.00%	25.00%
Target Allocation	.15
Minimum [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	25.00%	20.00%
Target Allocation	.25
Minimum [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	0.00%	0.00%
Target Allocation	0
Minimum [Member] | Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	45.00%	45.00%
Target Allocation	.45
Maximum [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	20.00%	30.00%
Target Allocation	.20
Maximum [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	30.00%	25.00%
Target Allocation	.30
Maximum [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	5.00%	5.00%
Target Allocation	.05
Maximum [Member] | Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	50.00%	50.00%
Target Allocation	.50

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Description of investment policy and strategy for defined benefit plan asset. Includes, but is not limited to, investment allocation decision and factor pertinent to understanding investment policy and strategy for plan asset. Factor includes, but is not limited to, investment goal, risk management practice, permitted and prohibited investment including use of derivative, diversification, and relationship between plan asset and obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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