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Risks Arising from Financial Instruments - Summary of Effective Interest Rates at Balance Sheet (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Before hedging [Member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging $ 184 $ 1,889
Before hedging [Member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging $ 71,986 $ 76,277
Before hedging [Member] | US Dollar [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging   6.00%
Hedging   $ 505
Before hedging [Member] | US Dollar [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 5.10% 5.00%
Hedging $ 46,192 $ 50,368
Before hedging [Member] | Euro [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging   4.30%
Hedging   $ 1,086
Before hedging [Member] | Euro [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 2.50% 2.30%
Hedging $ 22,653 $ 21,233
Before hedging [Member] | Chinese Yuan [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 3.20% 2.90%
Hedging $ 41 $ 57
Before hedging [Member] | Canadian Dollar [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 4.50% 4.50%
Hedging $ 555 $ 625
Before hedging [Member] | South Korean Won [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 4.90% 5.50%
Hedging $ 40 $ 49
Before hedging [Member] | Mexican Peso [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 15.70% 15.70%
Hedging $ 239 $ 324
Before hedging [Member] | Pound Sterling [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 3.30% 5.40%
Hedging $ 1,154 $ 2,122
Before hedging [Member] | Other currency [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 11.20% 10.50%
Hedging $ 184 $ 299
Before hedging [Member] | Other currency [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 8.60% 7.40%
Hedging $ 1,111 $ 1,501
After hedging [Member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 1,975 2,469
After hedging [Member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging $ 70,195 $ 75,697
After hedging [Member] | US Dollar [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 5.30% 6.30%
Hedging $ 1,792 $ 789
After hedging [Member] | US Dollar [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 5.40% 5.20%
Hedging $ 36,780 $ 43,344
After hedging [Member] | Euro [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging   4.30%
Hedging   $ 1,086
After hedging [Member] | Euro [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 2.50% 2.50%
Hedging $ 23,530 $ 22,072
After hedging [Member] | Chinese Yuan [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 2.60% 2.50%
Hedging $ 2,921 $ 2,437
After hedging [Member] | Canadian Dollar [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 4.40% 4.40%
Hedging $ 2,657 $ 2,988
After hedging [Member] | South Korean Won [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 2.30% 1.90%
Hedging $ 2,200 $ 2,209
After hedging [Member] | Mexican Peso [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 10.80% 13.50%
Hedging $ 1,239 $ 624
After hedging [Member] | Pound Sterling [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 2.60% 8.20%
Hedging $ 34 $ 827
After hedging [Member] | Other currency [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 11.20% 11.70%
Hedging $ 184 $ 595
After hedging [Member] | Other currency [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Hedging 10.10% 8.20%
Hedging $ 833 $ 1,196