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Commitments and Contingencies - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Commitments And Contingencies Disclosure [Abstract] |
Cash compensation on termination of employment, maximum | $ 25

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- References No definition available. + Details
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- Definition Amount of increase in benefit obligation for benefits provided to employees payable from defined benefit plan or payable upon retirement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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