Income taxes - Income tax expense (Detail) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income taxes [Line Items]
Profit (loss) before tax	€ (526)	€ (1,731)	€ 509
Share of profit (loss) of associates and joint ventures accounted for using equity method	(98)	(2)	(4)
Income before taxes continuing operations	(429)	(1,729)	513
Current tax expense (income) and adjustments for current tax of prior periods	201	97	298
Deferred tax expense (income) recognised in profit or loss	274	210	401
Tax expense (income)	€ (73)	€ (113)	€ (103)

The amount of current tax expense (income) and adjustments for the current tax of prior periods. [Refer: Current tax expense (income); Adjustments for current tax of prior periods]

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The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); 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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The profit (loss) before tax expense or income. [Refer: Profit (loss)]

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The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)]

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