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Derivative Financial Instruments - Outstanding Foreign Currency Forward Contracts (Detail) € in Millions, ₩ in Millions, ¥ in Millions, £ in Millions, kr in Millions, kr in Millions, R in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions | Jun. 30, 2019 USD ($) | Jun. 30, 2019 KRW (₩) | Jun. 30, 2019 NOK (kr) | Jun. 30, 2019 MXN ($) | Jun. 30, 2019 EUR (€) | Jun. 30, 2019 ZAR (R) | Jun. 30, 2019 JPY (¥) | Jun. 30, 2019 DKK (kr) | Jun. 30, 2019 SGD ($) | Jun. 30, 2019 GBP (£) | Jun. 30, 2019 CAD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 NOK (kr) | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 EUR (€) | Dec. 31, 2018 ZAR (R) | Dec. 31, 2018 JPY (¥) | Dec. 31, 2018 DKK (kr) | Dec. 31, 2018 GBP (£)
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Forward Contracts [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency, Cash flow hedging | $ 680 | ₩ 17,600 | kr 4,199 | $ 156 | € 171 | R 124 | ¥ 121 | kr 15 | $ 38 | £ 23 | $ 2 | $ 631 | kr 5,229 | $ 204 | € 172 | R 124 | ¥ 121 | kr 35 | £ 12

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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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- Definition Fair value as of the balance sheet date of all foreign currency derivatives designated as cash flow hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(b),(c)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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