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Borrowings - Schedule Disclosure of Detailed Information about Exchangeable Bonds (Detail) | 12 Months Ended |  |
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Dec. 31, 2025 EUR (€) | Dec. 31, 2025 ₩ / shares | Dec. 31, 2024 EUR (€)
Disclosure of detailed information about borrowings [line items] |  |  |
Notional amount |  |  | € 1,065,900,000,000,000
Foreign currency exchangeable bonds [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Notional amount | € 27,100,000 |  |
Borrowings, interest rate | 0.78% |  |
Exchangeable bonds exchange rate | 100.00% |  |
Exchangeable bonds exchange price | ₩ / shares |  | ₩ 422,126 |
Exchangeable Bonds Exchange Period | From October 12, 2021 to August 22, 2026 |  |
Put option exercisable option date by bondholder from issuing date | Sep. 01, 2024 |  |
Put option exercisable option period by bondholder from issuing date | 3 years |  |
Put option by bondholders trigger number of consecutive trading days In which shares were suspended for trading | 30 days |  |
Call option by the issuer trigger percentage of share price over exchange price | 130.00% |  |
Number of trading days for determining share price | 20 days |  |
Number of consecutive trading days for determining share price | 30 days |  |
Call option by the issuer trigger clean up call percentage | 10.00% |  |

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