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Derivatives Balance Sheet Location (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017
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Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | $ 111 | $ 119
Interest Rate Swap [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 200 | $ 150
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 90 |
Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Fair Value, Net | $ (22) |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
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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. + Details
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- Details
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- Details
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- Details
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