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Risks Arising from Financial Instruments - Summary of Effective Interest Rates at Balance Sheet (Detail) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Before hedging [Member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
 Interest-bearing financial liabilities $ 659 $ 334 [1]
Before hedging [Member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
 Interest-bearing financial liabilities $ 71,659 $ 72,693 [1]
Before hedging [Member] | US Dollar [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 3.90% 0.00%
 Interest-bearing financial liabilities $ 200 $ 0 [1]
Before hedging [Member] | US Dollar [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 5.30% 5.30%
 Interest-bearing financial liabilities $ 41,436 $ 41,499 [1]
Before hedging [Member] | Euro [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 2.70% 2.70%
 Interest-bearing financial liabilities $ 27,719 $ 28,593 [1]
Before hedging [Member] | Chinese Yuan [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 3.90% 3.80%
 Interest-bearing financial liabilities $ 35 $ 38 [1]
Before hedging [Member] | Canadian Dollar [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 4.40% 4.50%
 Interest-bearing financial liabilities $ 541 $ 566 [1]
Before hedging [Member] | South Korean Won [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 5.10% 5.30%
 Interest-bearing financial liabilities $ 31 $ 39 [1]
Before hedging [Member] | Mexican Peso [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 13.30% 13.20%
 Interest-bearing financial liabilities $ 228 $ 225
Before hedging [Member] | Pound Sterling [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 2.50% 2.50%
 Interest-bearing financial liabilities $ 556 $ 567 [1]
Before hedging [Member] | Other currency [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 11.40% 11.00%
 Interest-bearing financial liabilities $ 458 $ 334 [1]
Before hedging [Member] | Other currency [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 9.80% 9.60%
 Interest-bearing financial liabilities $ 1,115 $ 1,165 [1]
After hedging [Member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
 Interest-bearing financial liabilities 1,850 1,527 [1]
After hedging [Member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
 Interest-bearing financial liabilities $ 70,468 $ 71,500 [1]
After hedging [Member] | US Dollar [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 5.60% 4.90%
 Interest-bearing financial liabilities $ 637 $ 1,193 [1]
After hedging [Member] | US Dollar [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 5.60% 5.60%
 Interest-bearing financial liabilities $ 32,343 $ 32,965 [1]
After hedging [Member] | Euro [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 2.60% 2.60%
 Interest-bearing financial liabilities $ 28,390 $ 29,274 [1]
After hedging [Member] | Chinese Yuan [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 2.70% 2.70%
 Interest-bearing financial liabilities $ 2,765 $ 2,768 [1]
After hedging [Member] | Canadian Dollar [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 4.30% 4.30%
 Interest-bearing financial liabilities $ 2,642 $ 2,668 [1]
After hedging [Member] | South Korean Won [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 2.70% 2.70%
 Interest-bearing financial liabilities $ 1,931 $ 2,049 [1]
After hedging [Member] | Mexican Peso [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 9.60% 13.20%
 Interest-bearing financial liabilities $ 828 $ 225
After hedging [Member] | Pound Sterling [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 2.90% 2.70%
 Interest-bearing financial liabilities $ 35 $ 37 [1]
After hedging [Member] | Other currency [member] | Floating interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 11.50% 10.90%
 Interest-bearing financial liabilities $ 1,213 $ 333 [1]
After hedging [Member] | Other currency [member] | Fixed interest rate [member]    
Disclosure of offsetting financial assets and liabilities [line items]    
Effective interest rate 9.70% 9.50%
 Interest-bearing financial liabilities $ 1,535 $ 1,515 [1]
[1] Amended to conform to the 2025 presentation