Commitments and Contingencies Level 4 (Details) - Environmental Liabilities - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Accrued Environmental Loss Contingencies, Current	$ 11	$ 12
Estimated Litigation Liability, Current	4	9
Environmental Institution of Parana IAP [Member]
Liability	11
Geismar, LA [Member]
Accrual for Environmental Loss Contingencies	15	15
Loss Contingency, Range of Possible Loss, Minimum	9
Loss Contingency, Range of Possible Loss, Maximum	$ 22
Discount rate assumed to record at present value	3.00%
Undiscounted Liability Expected to be Paid	next 23 years
Accrual for Environmental Loss Contingencies, Gross	$ 20
Accrual for Environmental Loss Contingencies, Undiscounted, Due Ratably over the Next Five Years	6
Superfund and Offsite Landfills - allocated share: Less than 1% [Member]
Accrual for Environmental Loss Contingencies	1	0
Loss Contingency, Range of Possible Loss, Minimum	0
Loss Contingency, Range of Possible Loss, Maximum	2
Superfund and Offsite Landfills - allocated share: Equal to or Greater than 1% [Member]
Accrual for Environmental Loss Contingencies	7	7
Loss Contingency, Range of Possible Loss, Minimum	5
Loss Contingency, Range of Possible Loss, Maximum	13
Currently-Owned [Member]
Accrual for Environmental Loss Contingencies	5	9
Loss Contingency, Range of Possible Loss, Minimum	4
Loss Contingency, Range of Possible Loss, Maximum	11
Accrual for Environmental Loss Contingencies, Undiscounted, Due Ratably over the Next Five Years	5
Formerly-Owned - Remediation [Member]
Accrual for Environmental Loss Contingencies	32	30
Loss Contingency, Range of Possible Loss, Minimum	31
Loss Contingency, Range of Possible Loss, Maximum	46
Formerly-Owned - Monitoring Only [Member]
Accrual for Environmental Loss Contingencies	1	$ 1
Loss Contingency, Range of Possible Loss, Minimum	0
Loss Contingency, Range of Possible Loss, Maximum	$ 1