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Financial Instruments - Additional Information (Detail) $ in Millions | 9 Months Ended
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Sep. 30, 2018 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Estimated amount reclassified from other comprehensive income and reduce interest expense | $ 26

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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80845-113994 + Details
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