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New Accounting Pronouncements - Additional Information (Detail) $ in Millions | 6 Months Ended
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Jun. 30, 2018 USD ($) Business_Units | Jun. 30, 2017 USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Number of business units inconsistent with revenue recognition | Business_Units | 2 |
Accounting Standards Update 2016-18 [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
New accounting pronouncements or adoption of new standard resulted of cash used in (decrease) increase in operating activities | $ (6.6) | $ 7.0
Accounting Standards Update 2016-02 [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Future minimum cash commitments under operating leases | $ 200.0 |

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- Definition New accounting pronouncement or adoption of new standard resulted of cash used in (decrease) increase in operating activities. + References No definition available. + Details
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- Definition Number of business units inconsistent with revenue recognition. + References No definition available. + Details
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- Definition Net amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + 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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- Details
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