Long-Term Employee Benefits (Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target plan asset allocations	27.00%	29.00%
Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target plan asset allocations	24.00%	22.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target plan asset allocations	33.00%	32.00%
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target plan asset allocations	2.00%	2.00%
Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target plan asset allocations	8.00%	9.00%
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target plan asset allocations	4.00%	3.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target plan asset allocations	2.00%	3.00%