Acquisitions and Disposals of Subsidiaries - Additional Information (Detail) - USD ($) $ in Millions		6 Months Ended
Feb. 27, 2026	Jun. 30, 2026
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired	85.00%
Date of acquisition	Feb. 27, 2026
Name of acquiree	BeatBox
Consideration transferred, acquisition-date fair value	$ 493
Fair value of put option over non-controlling interest		$ 202
BeatBox [Member]
Disclosure of detailed information about business combination [line items]
Consideration transferred, acquisition-date fair value		$ 493
Forward purchase contract, contingent acquiring percentage		15.00%

Fair value of put option over non-controlling interest.

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Forward purchase contract, contingent acquiring percentage.

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The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Total for all business combinations [member]]

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The date on which the acquirer obtains control of the acquiree in a business combination.

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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.

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The name of the business or businesses that the acquirer obtains control of in a business combination. [Refer: Total for all business combinations [member]]

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The percentage of voting equity interests acquired in a business combination. [Refer: Total for all business combinations [member]]

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