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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, 2023 | Dec. 31, 2022
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | $ (5,469) | $ (5,492)
Before hedging [Member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 1,889 | 1,730
Before hedging [Member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | $ 76,277 | $ 78,261
Before hedging [Member] | Canadian Dollar [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 4.54% | 4.50%
Hedging | $ 625 | $ 613
Before hedging [Member] | Chinese Yuan [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 2.91% | 2.44%
Hedging | $ 57 | $ 50
Before hedging [Member] | Euro [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 4.27% | 1.68%
Hedging | $ 1,086 | $ 1,048
Before hedging [Member] | Euro [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 2.26% | 2.27%
Hedging | $ 21,233 | $ 20,391
Before hedging [Member] | Pound Sterling [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 5.38% | 5.13%
Hedging | $ 2,122 | $ 2,208
Before hedging [Member] | South Korean Won [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging |  | $ 1
Before hedging [Member] | South Korean Won [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 5.49% | 2.96%
Hedging | $ 49 | $ 46
Before hedging [Member] | US Dollar [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 6.00% | 5.05%
Hedging | $ 505 | $ 430
Before hedging [Member] | US Dollar [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 5.02% | 4.99%
Hedging | $ 50,368 | $ 53,478
Before hedging [Member] | Other currency [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 10.47% | 13.39%
Hedging | $ 299 | $ 252
Before hedging [Member] | Other currency [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 8.85% | 10.53%
Hedging | $ 1,825 | $ 1,476
After hedging [Member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 2,469 | 4,557
After hedging [Member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | $ 75,697 | $ 75,434
After hedging [Member] | Canadian Dollar [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging |  | 4.34%
Hedging |  | $ 1,455
After hedging [Member] | Canadian Dollar [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 4.37% | 4.37%
Hedging | $ 2,988 | $ 3,741
After hedging [Member] | Chinese Yuan [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 2.49% | 2.50%
Hedging | $ 2,437 | $ 1,230
After hedging [Member] | Euro [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 4.27% | 1.68%
Hedging | $ 1,086 | $ 1,048
After hedging [Member] | Euro [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 2.46% | 2.31%
Hedging | $ 22,072 | $ 21,242
After hedging [Member] | Pound Sterling [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging |  | 3.70%
Hedging |  | $ 1,078
After hedging [Member] | Pound Sterling [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 8.24% | 5.55%
Hedging | $ 827 | $ 1,607
After hedging [Member] | South Korean Won [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging |  | 3.08%
Hedging |  | $ 311
After hedging [Member] | South Korean Won [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 1.85% | 0.94%
Hedging | $ 2,209 | $ 1,896
After hedging [Member] | US Dollar [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 6.35% |
Hedging | $ 789 |
After hedging [Member] | US Dollar [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 5.20% | 5.27%
Hedging | $ 43,344 | $ 44,547
After hedging [Member] | Other currency [member] | Floating interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 11.66% | 11.17%
Hedging | $ 595 | $ 666
After hedging [Member] | Other currency [member] | Fixed interest rate [member] |  |
Disclosure of offsetting financial assets and liabilities [line items] |  |
Hedging | 10.00% | 12.19%
Hedging | $ 1,820 | $ 1,172

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