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Use Of Judgements And Estimates - Additional Information (Detail) € / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 16, 2021 € / shares shares | Dec. 31, 2021 EUR (€) | Dec. 31, 2023 EUR (€) € / shares | Dec. 31, 2022 EUR (€) € / shares | Dec. 31, 2021 EUR (€) | Dec. 31, 2023 USD ($) | Jun. 30, 2023 € / shares | Oct. 01, 2022 USD ($) | Oct. 01, 2021 EUR (€) | Oct. 01, 2021 USD ($) | Jun. 07, 2021 € / shares | Apr. 30, 2021 EUR (€) | Dec. 31, 2020 EUR (€)
Disclosure Of Use Of Estimates And Judgements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of goodwill |  |  | € 0 | € 0 |  |  |  |  |  |  |  |  |
Debt instrument face value |  |  | € 207,357,000 | € 133,627,000 |  |  |  |  |  |  |  |  |
Par value per share | € / shares |  |  | € 3.05 | € 5.32 |  |  | € 2.58 |  |  |  |  |  |
Adjustment to additional paid in capital incremental costs |  |  |  |  | € 17,397,000 |  |  |  |  |  |  |  |
Non incremental costs attributable to share issue recognized in expenses |  |  |  |  | 8,046,000 |  |  |  |  |  |  |  |
Gains (losses) on change in fair value of derivatives |  |  | € 6,476,000 | € 80,748,000 | (68,953,000) |  |  |  |  |  |  |  |
Kensington Acquisition Corp Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Use Of Estimates And Judgements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net assets excluding subscription receivable |  |  | 99,524,000 |  |  | $ 115,244 |  |  | € 99,524,000 | $ 115,244 |  |  |
Common stock shares subscription receivable value |  |  | 95,860,000 |  |  | 111,000 |  |  | 95,860,000 | $ 111,000 |  |  |
Net assets |  |  | 195,384,000 |  |  |  |  |  | 195,384,000 |  |  |  |
Fair value of shares exchanged |  |  | 267,556,000 |  |  |  |  |  |  |  |  |  |
Transaction Costs |  | € 72,172,000 |  |  | € 72,172,000 |  |  |  |  |  |  |  |
Wallbox Chargers Business [Member] | At fair value [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Use Of Estimates And Judgements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net assets |  |  | € 1,209,040,000 |  |  | $ 1,400,000 |  | $ 1,400,000 | € 1,209,040,000 |  |  |  |
Equity interest as a percentage of fair value of net assets |  |  | 18.10% |  |  | 18.10% |  |  | 18.10% | 18.10% |  |  |
Fair value of shares exchanged |  |  | € 267,556,000 |  |  |  |  |  | € 267,556,000 |  |  |  |
Wallbox [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Use Of Estimates And Judgements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Par value per share | € / shares |  |  |  |  |  |  |  |  |  |  | € 0.12 |  |
Percentage of incremental costs directly attributable to equity issue |  |  | 100.00% |  | 100.00% |  |  |  |  |  |  |  |
Convertible debt one [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Use Of Estimates And Judgements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face value |  |  |  |  |  |  |  |  |  |  |  |  | € 25,880,000
Financial liabilities at amortised cost |  | 25,880,000 |  |  | € 25,880,000 |  |  |  |  |  |  |  |
Convertible debt two [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Use Of Estimates And Judgements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face value |  | € 7,000,000 |  |  | € 7,000,000 |  |  |  |  |  |  |  |
Borrowings interest rate |  | 8.00% |  |  | 8.00% |  |  |  |  |  |  |  |
Financial liabilities at amortised cost |  |  | € 7,000,000 |  |  |  |  |  |  |  |  |  |
Convertible debt three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Use Of Estimates And Judgements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face value |  | € 27,550,000 |  |  | € 27,550,000 |  |  |  |  |  |  |  |
Borrowings interest rate |  | 5.00% |  |  | 5.00% |  |  |  |  |  |  |  |
Financial liabilities at fair value through profit or loss |  |  |  |  |  |  |  |  |  |  |  | € 27,550,000 |
Convertible debt one two and three [member] | Common stock class A [member] | Ordinary shares [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Use Of Estimates And Judgements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock shares issued during the period conversion of convertible debt shares. | shares | 147,443 |  |  |  |  |  |  |  |  |  |  |  |
Par value per share | € / shares | € 0.5 |  |  |  |  |  |  |  |  |  |  |  |

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