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Deferred Tax Assets and Liabilities - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Components Of Deferred Tax Assets And Liabilities [line items]    
Net deferred tax liabilities $ 12,204 $ 12,627
Unrecognized tax attributes amount 27,900 $ 27,000
Expiration period 1 [member]    
Disclosure Of Components Of Deferred Tax Assets And Liabilities [line items]    
Tax losses carried forward and deductible temporary differences $ 200  
Tax losses and deductible temporary differences expiration period Year 1  
Expiration period 2 [member]    
Disclosure Of Components Of Deferred Tax Assets And Liabilities [line items]    
Tax losses carried forward and deductible temporary differences $ 300  
Tax losses and deductible temporary differences expiration period Year 2  
Expiration period 3 [member]    
Disclosure Of Components Of Deferred Tax Assets And Liabilities [line items]    
Tax losses carried forward and deductible temporary differences $ 200  
Tax losses and deductible temporary differences expiration period Year 3  
Expiration period more than 3 [member]    
Disclosure Of Components Of Deferred Tax Assets And Liabilities [line items]    
Tax losses $ 24,900  
Tax losses carried forward and deductible temporary differences 2,300  
Changes in tax rates or tax laws enacted or announced [member]    
Disclosure Of Components Of Deferred Tax Assets And Liabilities [line items]    
Net deferred tax liabilities $ 6,500