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Business and Basis of Presentation - Additional Information (Detail) | 6 Months Ended
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Jun. 30, 2018 Segment
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Number Of Reporting Units | 4

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- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References No definition available. + Details
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- References No definition available. + Details
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