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Income Taxes - Summary of Difference Between Provision (Benefit) for Income Taxes Calculated at United States Federal Statutory Income Tax Rate and Consolidated Provision (Benefit) for Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Consolidated income before provision for income taxes and equity in net income of affiliates multiplied by the United States federal statutory income tax rate $ 361.0 $ 275.6 $ 213.5
Differences in income taxes on foreign earnings, losses and remittances (79.2) (47.8) (38.7)
Valuation allowance adjustments 24.6 (74.2) 0.2
Tax credits (5.7) (0.7) (16.4)
Tax audits and assessments 0.7 (12.8) 2.7
Other (15.9) (18.7) 31.4
Provision for income taxes $ 285.5 $ 121.4 $ 192.7