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Investments and Other Non-Current Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Investments and Other Non-current Assets    
Equity method investments $ 12.5 $ 12.9
Deferred tax assets 235.6 248.9
Income tax receivables 33.6 30.4
Other non-current assets 41.8 48.8
Investments and other non-current assets $ 323.5 $ 341.0