Liquidity - Financial Debt (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financial Liabilities
Carrying Amount	€ 7,169	€ 10,943
Current financial liabilities	1,735	4,808
Non-current financial liabilities	7,941	9,547
Total financial liabilities	€ 9,676	€ 14,354
Financial debt as % of financial liabilities	74.00%	76.00%
Trade-debtors with credit balances	€ 186	€ 286
Interest rate	3.49%	1.23%	0.83%
Bonds
Financial Liabilities
Carrying Amount	€ 6,780	€ 8,155
Private placements
Financial Liabilities
Carrying Amount	388	405
Commercial Paper
Financial Liabilities
Carrying Amount	0	€ 928
Interest rate		1.96%
Bank loans
Financial Liabilities
Carrying Amount	0	€ 1,456
Current
Financial Liabilities
Nominal Volume	1,143	3,986
Carrying Amount	1,143	3,983
Current financial liabilities	€ 1,735	€ 4,808
Financial debt as % of financial liabilities - current	66.00%	83.00%
Current \| Bonds
Financial Liabilities
Nominal Volume	€ 850	€ 1,600
Carrying Amount	849	1,600
Current \| Private placements
Financial Liabilities
Nominal Volume	292	0
Carrying Amount	294	0
Current \| Commercial Paper
Financial Liabilities
Nominal Volume	0	930
Carrying Amount	0	928
Current \| Bank loans
Financial Liabilities
Nominal Volume	0	1,456
Carrying Amount	0	1,456
Non Current
Financial Liabilities
Nominal Volume	6,612	7,778
Carrying Amount	6,026	6,960
Non-current financial liabilities	€ 7,941	€ 9,547
Financial debt as % of financial liabilities - non-current	76.00%	73.00%
Non Current \| Bonds
Financial Liabilities
Nominal Volume	€ 6,521	€ 7,381
Carrying Amount	5,932	6,556
Non Current \| Private placements
Financial Liabilities
Nominal Volume	90	397
Carrying Amount	95	405
Non Current \| Commercial Paper
Financial Liabilities
Nominal Volume	0	0
Carrying Amount	0	0
Non Current \| Bank loans
Financial Liabilities
Nominal Volume	0	0
Carrying Amount	€ 0	€ 0

The interest rate on borrowings. [Refer: Borrowings]

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The amount of current financial liabilities. [Refer: Financial liabilities]

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The amount of instruments issued by the entity that represent indebtedness.

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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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The amount of non-current financial liabilities. [Refer: Financial liabilities]

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The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

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The percent of financial debt to current financial liabilities.

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The percent of financial debt to financial liabilities.

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The percent of financial debt to non-current financial liabilities.

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Represents trade debtors with a credit balance that has been moved from financial liabilities to Trade and other payables.

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