Cash and cash equivalents - Disclosure of cash and cash equivalents (Details) - EUR (€) € in Millions	Dec. 31, 2025	Dec. 31, 2024
Subclassifications of assets, liabilities and equities [abstract]
Cash at banks	€ 10,134	€ 9,408
Money market securities measured at FVPL	13,191	19,127
Other cash equivalents	6,821	5,565
Total Cash and cash equivalents	€ 30,146	€ 34,100

The amount of cash balances held at banks.

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The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

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The amount of cash and cash equivalents that the entity does not separately disclose in the same statement or note. [Refer: Cash and cash equivalents]

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A classification of cash equivalents representing short-term investments. [Refer: Cash equivalents]

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