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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Sep. 30, 2021
Income Taxes, Additional Information [Line Items]      
Effective income tax rate 14.50% 14.10%  
Ireland statutory income tax rate 12.50% 12.50%  
Gross tax effected unrecognized tax benefits     $ 2,726
Amount of unrecognized tax benefits which may impact effective tax rate     2,268
Total net accrued interest, net of tax benefit     252
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense $ 17 $ 15  
Mark-to-market gain (loss) 57    
Mark-to-market gain (loss), tax 14    
Restructuring and impairment costs 49 $ 0  
Restructuring charges, tax 7    
2021 Restructuring Plan      
Income Taxes, Additional Information [Line Items]      
Restructuring and impairment costs $ 49   $ 242