Acquisitions and Dispositions (Pro Forma Information) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2014
Comex [Member]
Business Acquisition [Line Items]
Revenue reported for the last annual period of a business to be acquired.	$ 4,138	$ 12,227

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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