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Earnings (loss) per share - Schedule of Earnings per Share (Detail) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
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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

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