Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Taxes [Line Items]          
Tax loss and credit carryforwards of certain foreign subsidiaries $ 137.6   $ 137.6 $ 115.1  
Amount of tax loss and credit carryforwards that will expire between 2018 and 2027 70.7   70.7    
Amount of tax loss and credit carryforwards that can be carried forward indefinitely 66.9   66.9    
U.S. foreign tax credit carryforwards 186.2   186.2 99.6  
State tax loss carryforwards 0.4   $ 0.4    
Effective tax rate applied     35.00%    
Net expense 153.3        
Valuation allowance 163.4        
Remeasurement of net deferred tax liabilities in corporate income tax rate 5.5        
Domestic foreign tax credit carryforwards 4.6        
Percentage of domestic source income reclassified as foreign source income     50.00%    
Deferred tax assets tax credit carryforwards foreign resulting from overall domestic loss 31.4   $ 31.4    
Valuation allowance 299.4   299.4 115.4  
Valuation allowance, deferred tax asset, change in amount     184.0 (5.9) $ (208.7)
Additions (Reductions) charged to income tax expenses     183.7 (5.6) (205.6)
Other comprehensive income (loss), foreign currency translation gain (loss) arising during period, tax     (0.3) 0.3 3.1
Unremitted earnings that were permanently reinvested relating to operating subsidiaries 2,400.0   2,400.0    
Deferred tax liability on unremitted foreign earnings 29.1   29.1 5.5  
Total amount of unrecognized tax benefits, including related interest and penalties 62.0   62.0 62.0 58.0
Unrecognized tax benefits excluding interest and penalties that if recognized would affect the effective tax rate 44.4   44.4 44.8  
Total accrued interest for tax contingencies 9.9   9.9 9.4 7.1
Total accrued penalties for tax contingencies 1.5   1.5 2.1 1.5
Increase (decrease) in interest expense related to uncertain tax positions     (0.1) 2.7 2.0
Increase (decrease) in penalties to uncertain tax positions     (0.8) $ 0.7 $ 0.6
Amount of unrecognized tax benefits that could decrease within the next 12 months 7.0   7.0    
Decrease in unrecognized tax benefits due to the settlement of audits or resolution of administrative or judicial proceedings 0.7   0.7    
Decrease in unrecognized tax benefits expiration of statute of limitations 6.3   $ 6.3    
Scenario, Forecast [Member]          
Income Taxes [Line Items]          
Effective tax rate applied   21.00%      
Carryforwards expiring in 2024 [Member]          
Income Taxes [Line Items]          
Expiration year of tax credit carryforwards     Dec. 31, 2020    
Earliest Tax Year [Member]          
Income Taxes [Line Items]          
Open tax years by major tax jurisdiction     2012    
Domestic [Member]          
Income Taxes [Line Items]          
Domestic research and development tax credit carryforward 4.8   $ 4.8    
Domestic [Member] | Research and Development [Member]          
Income Taxes [Line Items]          
Expiration year of tax credit carryforwards     2037    
State [Member] | Earliest Tax Year [Member]          
Income Taxes [Line Items]          
Expiration year of tax loss carryforwards     2022    
State [Member] | Latest Tax Year [Member]          
Income Taxes [Line Items]          
Expiration year of tax loss carryforwards     2037    
United States [Member]          
Income Taxes [Line Items]          
Unremitted earnings that were permanently reinvested $ 97.9   $ 97.9