Earnings (loss) per share - Schedule of Earnings per Share (Detail) - USD ($) shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) used for the computation of basic and diluted earnings (loss) per share	$ (1,639)	$ (559)	$ (2,446)
Weighted average number of shares used in the computation of basic earnings (loss) per share	1,131	1,119	1,110
Weighted average number of shares used in the computation of diluted earnings (loss) per share	1,131	1,119	1,110

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

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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