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Risks Arising from Financial Instruments - Summary of Carrying Amount of Fixed Rate Interest-Bearing Financial Liabilities and Fair Value (Detail) - Fixed interest rate [member] - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
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Disclosure of interest bearing financial instruments [line items] |  |
Carrying amount | $ (69,424) | $ (70,296)
Fair value | (68,916) | (70,343)
US Dollar [member] |  |
Disclosure of interest bearing financial instruments [line items] |  |
Carrying amount | (41,032) | (41,050)
Fair value | (41,174) | (41,863)
Euro [member] |  |
Disclosure of interest bearing financial instruments [line items] |  |
Carrying amount | (27,020) | (27,854)
Fair value | (26,465) | (27,187)
Pound Sterling [member] |  |
Disclosure of interest bearing financial instruments [line items] |  |
Carrying amount | (510) | (519)
Fair value | (455) | (467)
Canadian Dollar [member] |  |
Disclosure of interest bearing financial instruments [line items] |  |
Carrying amount | (490) | (509)
Fair value | (453) | (465)
Other currency [member] |  |
Disclosure of interest bearing financial instruments [line items] |  |
Carrying amount | (372) | (364)
Fair value | $ (369) | $ (362)

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- Definition Line items represents information about interest bearing financial instruments. + References No definition available. + Details
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- Definition Fixed rate interest bearing loans carrying value. + References No definition available. + Details
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- Definition Fixed rate interest bearing loans fair value. + References No definition available. + Details
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- Details
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- Details
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