Commitments and Contingencies Level 4 (Details) - Environmental Liabilities (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015 sites	Dec. 31, 2014 sites
Accrued Environmental Loss Contingencies, Current	$ 9	$ 12
Estimated Litigation Liability, Current	7us-gaap_LitigationReserveCurrent	7us-gaap_LitigationReserveCurrent
Environmental Institution of Parana IAP [Member]
Liability	12
Geismar, LA [Member]
Discount rate assumed to record at present value	3.00%
Undiscounted Liability Expected to be Paid	next 24 years
Accrual for Environmental Loss Contingencies, Gross	20
Accrual for Environmental Loss Contingencies, Undiscounted, Due Ratably over the Next Five Years	6
Liability	15	15
Range of Reasonably Possible Costs - Low	9
Range of Reasonably Possible Costs - High	22
Number of Sites	1	1
Superfund and Offsite Landfills - allocated share: Less than 1% [Member]
Liability	0	0
Range of Reasonably Possible Costs - Low	0
Range of Reasonably Possible Costs - High	1
Number of Sites	17	17
Superfund and Offsite Landfills - allocated share: Equal to or Greater than 1% [Member]
Liability	7	7
Range of Reasonably Possible Costs - Low	5
Range of Reasonably Possible Costs - High	13
Number of Sites	11	11
Currently-Owned [Member]
Accrual for Environmental Loss Contingencies, Undiscounted, Due Ratably over the Next Five Years	5
Liability	6	9
Range of Reasonably Possible Costs - Low	4
Range of Reasonably Possible Costs - High	12
Number of Sites	13	13
Formerly-Owned - Remediation [Member]
Liability	32	30
Range of Reasonably Possible Costs - Low	31
Range of Reasonably Possible Costs - High	45
Number of Sites	13	12
Formerly-Owned - Monitoring Only [Member]
Liability	1	1
Range of Reasonably Possible Costs - Low	0
Range of Reasonably Possible Costs - High	$ 1
Number of Sites	4	4

Accrual for Environmental Loss Contingencies, Undiscounted, Due within One to Five Years

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Discount rate assumed to record at present value

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Number of Sites

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Undiscounted Liability Expected to be Paid

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Undiscounted amount of the accrual for environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 5.Y.Q1)

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Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

+ References

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- Definition

Carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid within one year of the date of the statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

High-end of the range estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Low-end of the range estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded.

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-Publisher FASB

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-Subparagraph (c),(d)(2)

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