Income Taxes - Deferred Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Other current assets	$ 96.7	$ 139.4
Other non-current assets	62.8	87.9
Deferred tax liabilities	844.2	528.3
Total deferred tax liabilities	$ 684.7	$ 301.0