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Litigation And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Loss Contingency [Abstract]
Reserve for environmental matters	$ 119
Accrued environmental loss contingencies, non-current	78
Guarantees	$ 433	$ 379

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

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