v3.7.0.1

Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items] |  |  |
Current period (gain) loss | $ 4.8 | $ (1.8) | $ 8.0
U.S. [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Beginning accumulated other comprehensive income | 3.7 | 3.5 |
Current period (gain) loss | 0.5 | 0.2 |
Ending accumulated other comprehensive income | 4.2 | 3.7 | 3.5
Non-U.S. [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Beginning accumulated other comprehensive income | 4.0 | 5.7 |
Current period (gain) loss | 6.5 | (1.1) |
Exchange rate changes | (0.8) | (0.6) |
Ending accumulated other comprehensive income | $ 9.7 | $ 4.0 | $ 5.7

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