Income Taxes - Schedule of Earnings (Loss) before Income Taxes and Income Tax Expense (Benefit) (Parenthetical) (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2017 |
|
| Income Tax Disclosure [Abstract] | ||
| Individual foreign jurisdiction income threshold | 5.00% | |
| Tax cuts and jobs act of 2017, incomplete accounting, provisional income tax expense (benefit) | $ 99.9 | $ 99.9 |
| X | ||||||||||
- Definition Individually, none of the foreign jurisdictions included in "Other jurisdictions" had more than this percentage threshold of consolidated earnings (loss) before taxes. No definition available.
|
| X | ||||||||||
- Definition Tax cuts and jobs act of 2017 incomplete accounting provisional income tax expense (benefit). No definition available.
|
| X | ||||||||||
- References No definition available.
|