Contingencies and Commitments - Loss Contingencies (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Environmental [Member]
Environmental Contingencies
Liability recorded for projected environmental remediation costs	$ 17
Litigation Contingencies
Minimum potential loss	1
Maximum potential loss	3
Litigation [Member]
Litigation Contingencies
Minimum potential loss	1,200
Maximum potential loss	1,800
Aggregate reserves for claims deemed both probable and reasonably estimable	$ 238	$ 239

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

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

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- Definition

Amount of loss contingency liability.

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The estimated maximum amount of possible loss from the contingency.

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