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Income Tax Expense - Summary of Allocation of Income Tax Expense Between Current and Deferred Taxes (Details) - EUR (€) € in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Income taxes paid (refund) [abstract]
Current taxes	€ (1,243)	€ (1,171)	€ (2,560)
Deferred taxes	780	441	958
Total	(463)	(730)	(1,602)
Income before tax and investments accounted for using the equity method	€ 2,739	€ 4,238	€ 7,153

X

- Definition

The amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period.

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- Definition

The amount of tax expense (income) relating to changes in deferred tax liabilities and deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities]

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The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

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Income before tax and investments accounted for equity method investments.

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