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Derivative Financial Instruments and Risk Management Policies - Sensitivity Analysis Due to Fluctuations in Interest Rates (Details) € in Millions	12 Months Ended
	Dec. 31, 2023 EUR (€)
Change in interest rate
Increase in interest rate	1.00%
Decrease in interest rate	1.00%
Impact on consolidated income statement
Decrease in consolidated income	€ (25)
Increase in consolidated income	25
Impact on consolidated equity
Decrease in consolidated equity	(238)
Increase in consolidated equity	€ (238)

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