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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Tax Credit Carryforward [Line Items]          
Federal statutory income tax rate   35.00%      
Income tax benefit related to revaluation of net deferred tax liability   $ 242      
Effective income tax rate   39.80% 7.90%    
Unrecognized tax benefit   $ 132 $ 78 $ 46 $ 115
Total uncertain tax position identified in foreign jurisdiction   64 65 69  
Reduction in unrecognized tax position completion of audits in foreign jurisdictions   14 21 75  
Decrease in unrecognized tax benefits is reasonably possible   75      
Income tax interest and penalties related to unrecognized tax benefit   17 10 $ 1  
Accrued income tax interest and penalties related to unrecognized tax benefit   32 $ 15    
Foreign tax credit   658      
Net operating loss carry forward   816      
Tax-deductible goodwill   153      
Undistributed earnings of foreign subsidiaries   $ 5,302      
Scenario, Forecast [Member]          
Tax Credit Carryforward [Line Items]          
Federal statutory income tax rate 21.00%        
Maximum [Member]          
Tax Credit Carryforward [Line Items]          
Period of amortization of goodwill   13 years      
Carry Forward Expiration Year 2020 [Member]          
Tax Credit Carryforward [Line Items]          
Net operating loss carry forward   $ 11      
Carry Forward Expiration Year 2022 [Member]          
Tax Credit Carryforward [Line Items]          
Net operating loss carry forward   141      
Carry Forward Expiration Year 2026 [Member]          
Tax Credit Carryforward [Line Items]          
Net operating loss carry forward   287      
Carry Forward Expiration Year 2027 [Member]          
Tax Credit Carryforward [Line Items]          
Net operating loss carry forward   $ 219