Shareholders' Equity - Summary of Issued Share Capital and Reserves Attributable to Shareholders (Detail) - EUR (€) |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
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| Summary of issued share capital and reserves attributable to shareholders [line items] | ||||
| Share premium | € 6,853,000,000 | € 6,853,000,000 | € 6,853,000,000 | € 6,853,000,000 |
| Total share capital | 229 | 241 | 265 | |
| Other reserves | 43,000,000 | 951,000,000 | 379,000,000 | 669,000,000 |
| Group equity | 9,495,000,000 | 9,313,000,000 | 9,554,000,000 | € 10,935,000,000 |
| Shareholders of Aegon Ltd. [Member] | ||||
| Summary of issued share capital and reserves attributable to shareholders [line items] | ||||
| Share capital - par value | 229,000,000 | 241,000,000 | 265,000,000 | |
| Share premium | 6,853,000,000 | 6,853,000,000 | 6,853,000,000 | |
| Total share capital | 7,082,000,000 | 7,094,000,000 | 7,118,000,000 | |
| Retained earnings | 4,238,000,000 | 4,347,000,000 | 5,099,000,000 | |
| Treasury shares | (447,000,000) | (398,000,000) | (346,000,000) | |
| Total retained earnings | 3,792,000,000 | 3,949,000,000 | 4,753,000,000 | |
| Revaluation reserves | (2,519,000,000) | (3,706,000,000) | (3,770,000,000) | |
| Remeasurement of defined benefit plans | (966,000,000) | (1,072,000,000) | (1,006,000,000) | |
| Other reserves | 43,000,000 | 951,000,000 | 379,000,000 | |
| Group equity | € 7,432,000,000 | € 7,215,000,000 | € 7,475,000,000 |
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- Definition Retained earnings excluding treasury shares. No definition available.
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- Definition Revaluation surplus deficit. No definition available.
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- Definition Share capital par value. No definition available.
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- Definition Line items representing issued share capital and reserves attributable to shareholders. No definition available.
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- Definition The amount of residual interest in the assets of the entity after deducting all its liabilities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The nominal value of capital issued. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition A component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition A component of equity representing the accumulated remeasurements of defined benefit plans. [Refer: Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition A component of equity representing the entity's cumulative undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount received or receivable from the issuance of the entity's shares in excess of nominal value. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition An entity’s own equity instruments, held by the entity or other members of the consolidated group. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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