Share-Based Compensation Plans - Summary of Number and Weighted Average Exercise Prices of Share Options (Detail) - Equity Based Compensation Plan [Member]	Dec. 31, 2025 shares $ / shares	Dec. 31, 2025 shares € / shares	Dec. 31, 2024 shares € / shares	Dec. 31, 2023 shares € / shares	Dec. 31, 2022 shares € / shares
Disclosure Of Number And Weighted Average Exercise Prices Of Share Options [Line Items]
Outstanding options at the end of the year	11,282,865	11,282,865	15,165,029	19,049,997	20,348,470
Weighted average exercise price \| (per share)	$ 11.88	€ 11.22	€ 11.54	€ 11.88	€ 12.09

The number of share options outstanding in a share-based payment arrangement.

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 31
-Subparagraph b
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_31_b_i&doctype=Standard
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+ Details

- Definition

The weighted average exercise price of share options outstanding in a share-based payment arrangement. [Refer: Weighted average [member]]

+ References + Details