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Income Taxes- Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Line Items]      
Charges & credits $ 65 $ 12,515 $ 12,901
Deferred tax assets, valuation allowances relating to net operating losses in certain countries 133 127  
Deferred tax assets operating loss indefinite carryforwards amount 390    
Net operating losses 427 421  
Accrued interest and penalties $ 164 184 188
Minimum      
Income Tax Disclosure [Line Items]      
Deferred tax assets operating loss carryforwards expiration year 2030    
Maximum      
Income Tax Disclosure [Line Items]      
Deferred tax assets operating loss carryforwards expiration year 2040    
Domestic Country      
Income Tax Disclosure [Line Items]      
Charges & credits $ 75 3,961 8,769
Foreign Country      
Income Tax Disclosure [Line Items]      
Charges & credits $ 10 $ 8,554 $ 4,132