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INCOME TAX - Current and Deferred Components of Income Tax (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Abstract]
Current tax expense	€ (54)	€ (22)	€ (26)
Deferred tax (expense) / benefit	(13)	127	(29)
Income tax (expense) / benefit	€ (67)	€ 105	€ (55)

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- Definition

Income Taxes [Abstract]

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No definition available.

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- 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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