Income taxes - Additional Information (Detail) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Income Tax [Line Items] | |||
| Tax rate effect of adjustments for current tax of prior periods | 26.12% | 27.19% | 27.19% |
| Provisions Of Tax Benefit | € 38 | € 0 | |
| Additional Provisions Of Tax Benefit | € 7 | ||
| Withholding Tax Provision | 29 | ||
| Additional Tax Receivable | 16 | ||
| Total Tax Benefit | 17 | ||
| Impairment On Investments In Subsidiaries | 64 | 7 | 167 |
| Tax expense (income) at applicable tax rate | 24 | 8 | € 193 |
| Amount Of Deferred Tax Assets For Investment Tax Credits | 7 | ||
| Income Tax Benefits | 16 | ||
| Foreign Exchange Impact On Currency Translation Reserve | 2 | ||
| Amount Of Yearly Currency Variances | 4 | ||
| Tax Effect Of Intercompany Elimination | 2 | ||
| Long Term Tax Receivable | 155 | € 0 | |
| Netherlands [Member] | |||
| Income Tax [Line Items] | |||
| Additional Tax Due | 12 | ||
| Luxembourg [Member] | |||
| Income Tax [Line Items] | |||
| Tax effect of tax losses | 32 | ||
| Israel [Member] | |||
| Income Tax [Line Items] | |||
| Tax effect of tax losses | € 2 | ||