Pensions and Other Postretirement Benefits (Additional Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended				0 Months Ended	3 Months Ended		9 Months Ended			3 Months Ended
	Sep. 30, 2014 plan	Sep. 30, 2013	Jan. 28, 2013	Sep. 30, 2014 Pension Plan [Member]	Sep. 30, 2013 Pension Plan [Member]	Sep. 30, 2014 Pension Plan [Member]	Sep. 30, 2013 Pension Plan [Member]	Sep. 30, 2014 Foreign Pension Plans, Defined Benefit [Member]	Jan. 28, 2013 Commodity Chemicals Segment [Member]	Jan. 28, 2013 Commodity Chemicals Segment [Member] Pension Plan [Member]	Mar. 31, 2013 Commodity Chemicals Segment [Member] Pension Plan [Member]	Mar. 31, 2013 Owen Sound Facility [Member]	Sep. 30, 2014 Owen Sound Facility [Member]	Sep. 30, 2014 Minimum [Member] Foreign Pension Plans, Defined Benefit [Member]	Sep. 30, 2014 Maximum [Member] Foreign Pension Plans, Defined Benefit [Member]	Sep. 30, 2014 U.S. Pension Settlement Charges [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions to defined benefit pension plans in 2012														$ 15	$ 25
Contributions to defined benefit pension plans								11
Settlement loss				(2)	0	(7)	(18)			(33)	(33)
Reduction in projected benefit obligation as a result of separation transaction			550
Reduction in accumulated benefit obligation as a result of separation transaction			165
Pension Settlement Charge, Canadian wind-up	2	18										16
Defined Benefit Plan, Number of Partial Wind Ups	2
Defined Benefit Plan Settlements Benefit Obligation Low Estimate													55
Defined Benefit Plan Settlements Benefit Obligation High Estimate													70
Defined Benefit Plan Contributions By Employer Low Estimate													10
Defined Benefit Plan Contributions By Employer High Estimate													20
Defined Benefit Plans, Net Periodic Benefit Cost, Estimated Future Employer Contributions In Current Fiscal Year	120			60		60
Defined Benefit Plan, Fair Value of Plan Assets									507
Defined Benefit Plan, Settlements, Plan Assets																40
Pension Settlement Charge, Settlement of a U.S. Plan																$ 5