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Risks Arising from Financial Instruments - Summary of Allowance for Impairment (Detail) - Impairment losses [member] - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Disclosure of impairment loss and reversal of impairment loss [line items]
Beginning balance	$ (468)	$ (438)
Impairment losses	(25)	(53)
Derecognition	10	64
Currency translation and other	(4)	(40)
Ending balance	$ (487)	$ (468)

X

- Definition

Allowance For Impairment Recognized During the Period on Financial Assets.

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

Currency Translation And Other Allowance Account For Credit Losses Of Financial Assets.

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No definition available.

+ Details

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X

- Definition

Derecognition allowance account for credit losses of financial assets.

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No definition available.

+ Details

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X

- Definition

Impairment Losses on Financial Assets.

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No definition available.

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X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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