Derivative and Other Financial Instruments (Accumulated Other Comprehensive Income ("AOCI") and Earnings from Changes in Fair Value Related to Derivative Instruments) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in AOCI (effective portion)	$ 9	$ 4	$ 27	$ 19
Amount of gain/(loss) reclassified from AOCI into earnings	5	1	15	(5)
Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in AOCI (effective portion)	(2)	0	1	3
Amount of gain/(loss) reclassified from AOCI into earnings	(1)	1	(1)	2
Commodities
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in AOCI (effective portion)	11	4	26	16
Amount of gain/(loss) reclassified from AOCI into earnings	$ 6	$ 0	$ 16	$ (7)

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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- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

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