Income Taxes - Components of Loss Income Before Income Taxes and Noncontrolling Interests (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
Schedule of Income Before Income Tax [Line Items] | |||
Domestic operations | $ 554.7 | $ 513.8 | $ 387.7 |
Foreign operations | 80.1 | 68.3 | 72.2 |
Income before income taxes and noncontrolling interests | $ 634.8 | $ 582.1 | $ 459.9 |