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Deferred tax assets and liabilities (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets and liabilities    
Deferred tax liabilities before offsetting € 9,315 € 10,668
Deferred tax assets available for offset (4,221) (5,833)
Deferred tax liabilities 5,094 4,835
Deferred tax assets before offsetting (net of accumulated write-down provisions) 8,790 8,546
Deferred tax liabilities available for offset (4,221) (5,833)
Deferred tax assets € 4,569 € 2,713