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Earnings Per Share - Schedule of Computations of Weighted Average Shares Outstanding (Parenthetical) (Detail) - shares shares in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Share Based Awards [Member] |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |
Potentially dilutive restricted share awards excluded from computation of diluted EPS | 0.4 | 1.0

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- Definition Dilutive securities excluded from computation of earnings per share, amount. + References No definition available. + Details
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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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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |