Derivative instruments and hedging activities - Summary of Pre-tax (Gains) Losses From Derivatives Designated in Cash Flow Hedging Relationships (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Derivative [Line Items] | ||||
| Financial expenses, net | $ (36) | $ (4) | $ (55) | $ 12 |
| Other comprehensive income (loss) | 24 | (1) | 32 | 0 |
| Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherComprehensiveIncomeLossNetOfTax | Designated as hedging instruments | ||||
| Derivative [Line Items] | ||||
| Other comprehensive income (loss) | (90) | (44) | (164) | 700 |
| Income Statement Location [Axis]: us-gaap:NonoperatingIncomeExpense | Designated as hedging instruments | ||||
| Derivative [Line Items] | ||||
| Financial expenses, net | $ 414 | $ 237 | $ 854 | $ 714 |