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Note 7 Fair value and carrying amount of the financial instruments (Details) - EUR (€)
€ in Millions
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Assets-liabilities [Line Items]        
Cash and cash equivalents € 71,858 € 79,756 € 81,508 € 67,799