Investments In and Advances To Affiliates (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Investments in and Advances to Affiliates [Line Items]
Operating margin	$ 670	$ 574	$ 1,263	$ 1,083
Net income (loss)	150	(387)	248	(313)
Income (Loss) from Equity Method Investments	$ 2	$ 7	9	14
Minority Owned Affiliates [Member]
Investments in and Advances to Affiliates [Line Items]
Revenue			341	286
Operating margin			65	69
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest			23	30
Parent [Member]
Investments in and Advances to Affiliates [Line Items]
Net income (loss)			$ 29	$ (356)

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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