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Income Taxes - Additional information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Taxes      
Discrete income tax expense $ 157    
Income tax expense (benefit), transfer of foreign intellectual property (157)    
Income tax expense (benefit), CARES Act (13)    
Tax from equity compensation 9 $ 3  
Income tax expense from GILTI 4 3  
Income tax (benefit) expense (153) 7 $ (3)
Loss before income taxes $ 24 $ 13 $ (27)
Effective income tax rate 637.50% (53.80%) (11.10%)
Deferred tax asset, intellectual property transfer $ 157    
Tax Cuts and Jobs Act, change in tax rate, income tax expense (benefit)     $ (6)
Tax expense, issuance of new US Treasury regulations   $ 3 1
Net operating loss and tax credit carryforwards 105    
Valuation allowance 47    
Tax credit carryforward, FIN 48 reserve 17    
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, provisional liability   2  
Tax liability related to uncertain tax positions 39 37 $ 34
Uncertain tax positions 18 $ 19  
Uncertain tax positions related to business acquisitions not recognized on balance sheet 21    
Uncertain tax positions recognized as current liability on balance sheet 39    
Interest accruals related to uncertain tax liabilities 1    
United States and Certain Foreign Jurisdictions      
Income Taxes      
Net operating loss carryforwards in the United States and certain foreign jurisdictions 17    
Domestic Tax Authority      
Income Taxes      
Net operating loss carryforwards in the United States and certain foreign jurisdictions 7    
Research Tax Credit Carryforward | Domestic Tax Authority      
Income Taxes      
Research and development tax credit carryforwards 16    
Research Tax Credit Carryforward | State and Local Jurisdiction      
Income Taxes      
Research and development tax credit carryforwards $ 65