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Summary of Change in Balance Sheet Position of Product-Related Liabilities (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Product Warranties Disclosures [Abstract]    
Reserve at beginning of the period $ 120.1 $ 60.8
Change in reserve 7.1 4.0
Cash payments (10.5) (3.6)
Translation difference 1.0 0.6
Reserve at end of the period $ 117.7 $ 61.8