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Risk Management Derivative in Net Investment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Derivative [Line Items] |  |  |
Foreign currency contracts | $ 111 | $ 145 | $ (104)
Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] |  |  |
Derivative [Line Items] |  |  |
Loss on impairments and divestitures, net | 26 | 0 | 0
Other, net | 0 | 0 | 0
Net Investment Hedging [Member] | Other Comprehensive Income (Loss) | Designated as Hedging Instrument [Member] |  |  |
Derivative [Line Items] |  |  |
Foreign currency contracts | 91 | 0 | 0
Net Investment Hedging [Member] | Other Comprehensive Income (Loss) | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Foreign currency contracts | 91 | 0 | 0
(Gain) loss on divestitures and impairments, net | Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] | Currency Swap [Member] |  |  |
Derivative [Line Items] |  |  |
Loss on impairments and divestitures, net | 26 |  |
(Gain) loss on divestitures and impairments, net | Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Loss on impairments and divestitures, net | 26 | 0 | 0
Other Nonoperating Income (Expense) [Member] | Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Other, net | $ 0 | $ 0 | $ 0

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- Definition The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1),(2) -URI http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986 + Details
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