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New Accounting Standards - Additional Information (Detail) - ASU 2016-16 $ in Millions | Jan. 01, 2017 USD ($)
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Increase deferred tax assets | $ 2.6
Decreasing deferred tax charge | 5.8
Retained Earnings |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Cumulative effect adjustment | $ 3.2

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