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Information Relating to the Consolidated Statement of Cash Flows (Details 1) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Item Effected [Line Items]
Distributions less than income from equity affiliates	[1]	$ (998)	$ (658)
Accounting Standards Update 2016-15
Item Effected [Line Items]
Distributions less than income from equity affiliates			$ (6)
[1] 2017 adjusted to conform to Accounting Standards Update 2016-15. Refer to Note 4, "Information Relating to the Consolidated Statement of Cash Flows" beginning on page 8.

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This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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- Definition

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.

+ References

No definition available.

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