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Derivative Instruments and Hedging Activities - Pre-tax Gains (Losses) (Details) - Not designated as a hedge - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative instruments and hedging activities
Total gain (loss)	$ 0	$ 1	$ (3)	$ 4
Foreign currency exchange contracts | Other, net
Derivative instruments and hedging activities
Total gain (loss)	(1)	0	(1)	0
Forward contracts | Other, net
Derivative instruments and hedging activities
Total gain (loss)	1	0	1	0
Metals contracts | Cost of sales
Derivative instruments and hedging activities
Total gain (loss)	0	1	0	5
Interest rate swaps
Derivative instruments and hedging activities
Total gain (loss)	$ 0	$ 0	$ (3)	$ (1)

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

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- Definition

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+ References

No definition available.

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