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Derivatives and Hedging - Derivative Contracts Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Foreign currency contracts |  |  |  |
Derivatives |  |  |  |
Derivative, Notional Amount | $ 713 |  | $ 713 |
Embedded derivatives |  |  |  |
Derivatives |  |  |  |
Derivative, Notional Amount | 24 |  | 24 |
Embedded derivatives | Total cost of revenue |  |  |  |
Derivatives |  |  |  |
Net gain (loss) associated with derivative contracts | 1 | $ (1) | 2 | $ (2)
Designated as Hedging Instrument | Commodity contracts |  |  |  |
Derivatives |  |  |  |
Derivative, Notional Amount | 11 |  | 11 |
Not designated as hedging instrument | Foreign currency contracts |  |  |  |
Derivatives |  |  |  |
Derivative, Notional Amount | 14 |  | 14 |
Not designated as hedging instrument | Commodity contracts |  |  |  |
Derivatives |  |  |  |
Derivative, Notional Amount | $ 19 |  | $ 19 |

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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