Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 22, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]            
Tax loss and credit carryforwards of certain foreign subsidiaries   $ 104.3   $ 103.6 $ 104.3  
Amount of tax loss and credit carryforwards that will expire between 2020 and 2036       76.5    
Amount of tax loss and credit carryforwards that can be carried forward indefinitely       27.1    
U.S. foreign tax credit carryforwards   211.0   208.9 211.0  
State tax loss carryforwards   2.2   $ 0.9 $ 2.2  
Effective tax rate applied       21.00% 21.00% 35.00%
Net expense $ 153.3   $ 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      
Additions (Reductions) charged to income tax expenses   29.5   $ 11.4 $ 52.7 $ 150.9
Valuation allowance   319.1   330.3 319.1  
Valuation allowance, deferred tax asset, change in amount       11.2 52.5 151.2
Unremitted earnings that were permanently reinvested relating to operating subsidiaries       2,400.0    
Deferred tax liability on unremitted foreign earnings   18.0   28.2 18.0  
Total amount of unrecognized tax benefits, including related interest and penalties   65.2 62.0 59.9 65.2 62.0
Unrecognized tax benefits excluding interest and penalties that if recognized would affect the effective tax rate   46.8   40.3 46.8  
Total accrued interest for tax contingencies   10.0 9.9 9.1 10.0 9.9
Total accrued penalties for tax contingencies   1.7 $ 1.5 1.9 1.7 1.5
Increase (decrease) in interest expense related to uncertain tax positions       (0.7) 1.0 (0.1)
Increase (decrease) in penalties to uncertain tax positions       0.2 0.4 $ (0.8)
Amount of unrecognized tax benefits that could decrease within the next 12 months       8.8    
Decrease in unrecognized tax benefits due to the settlement of audits or resolution of administrative or judicial proceedings       1.9    
Decrease in unrecognized tax benefits expiration of statute of limitations       $ 6.9    
Earliest Tax Year [Member]            
Income Taxes [Line Items]            
Expiration year of tax credit carryforwards       Dec. 31, 2020    
Open tax years by major tax jurisdiction       2014    
Latest Tax Year [Member]            
Income Taxes [Line Items]            
Expiration year of tax credit carryforwards       Dec. 31, 2029    
Domestic [Member]            
Income Taxes [Line Items]            
Domestic research and development tax credit carryforward   $ 7.3   $ 8.4 $ 7.3  
Domestic [Member] | Research and Development [Member]            
Income Taxes [Line Items]            
Expiration year of tax credit carryforwards       2036    
State [Member] | Earliest Tax Year [Member]            
Income Taxes [Line Items]            
Expiration year of tax loss carryforwards       2021    
State [Member] | Latest Tax Year [Member]            
Income Taxes [Line Items]            
Expiration year of tax loss carryforwards       2038    
United States [Member]            
Income Taxes [Line Items]            
Unremitted earnings that were permanently reinvested       $ 139.6    
China Growth and Impact Investment Fund [Member]            
Income Taxes [Line Items]            
Unremitted earnings that were permanently reinvested       $ 111.9