Organization and Basis of Presentation (Other Current Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current Assets, Other [Member]
Organization And Basis Of Presentation [Line Items]
Tax receivable	$ 655	$ 260

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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