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Contingencies and Commitments - Loss Contingencies (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Environmental [Member]
Environmental Contingencies
Liability recorded for projected environmental remediation costs	$ 19
Litigation Contingencies
Minimum potential loss	1
Maximum potential loss	3
Litigation [Member]
Litigation Contingencies
Minimum potential loss	947
Maximum potential loss	1,400
Aggregate reserves for claims deemed both probable and reasonably estimable	$ 251	$ 239

X

- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859



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-Name Accounting Standards Codification

-Topic 450

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X

- Definition

Amount of loss contingency liability.

+ References

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-Publisher FASB

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-Topic 450

-SubTopic 20

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- Definition

The estimated maximum amount of possible loss from the contingency.

+ References

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