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Detail of Certain Balance Sheet Accounts - Additional Information (Detail) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
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Balance Sheet Related Disclosures [Abstract] |  |
Deferred compensation plan assets | $ 31.5 | $ 30.6
Long-term deferred tax assets | 189.9 | 155.2
Deferred compensation plan liabilities | 52.6 | 50.0
Deferred income tax liabilities | $ 15.8 | $ 15.3

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