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Capital and funding - Disclosure of Reconciliation of Liabilities Arising from Financing Activities (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial liabilities [line items]
Financial liabilities at beginning of period	€ (29,488)	€ (30,133)
Cash movement	(112)	1,764
Business acquisi- tions/ disposals	(44)	0
Foreign exchange changes	614	(671)
Fair value changes	(110)	150
Other movements	482	598
Financial liabilities at end of period	(29,622)	(29,488)
Gain loss on termination and modifications of leases	5	28
Bank loans and overdrafts
Disclosure of financial liabilities [line items]
Financial liabilities at beginning of period	(519)	(402)
Cash movement	(98)	(129)
Business acquisi- tions/ disposals	(9)	0
Foreign exchange changes	130	29
Fair value changes	0	0
Other movements	10	17
Financial liabilities at end of period	(506)	(519)
Bonds and other loans
Disclosure of financial liabilities [line items]
Financial liabilities at beginning of period	(26,512)	(27,621)
Cash movement	(413)	1,343
Business acquisi- tions/ disposals	(3)	0
Foreign exchange changes	403	(727)
Fair value changes	(159)	490
Other movements	8	(3)
Financial liabilities at end of period	(26,692)	(26,512)
Lease liabilities
Disclosure of financial liabilities [line items]
Financial liabilities at beginning of period	(1,408)	(1,649)
Cash movement	399	546
Business acquisi- tions/ disposals	12	0
Foreign exchange changes	55	12
Fair value changes	0	0
Other movements	453	317
Financial liabilities at end of period	(1,395)	(1,408)
Derivatives
Disclosure of financial liabilities [line items]
Financial liabilities at beginning of period	(631)	(184)
Cash movement	0	0
Business acquisi- tions/ disposals	0	0
Foreign exchange changes	7	(2)
Fair value changes	130	(448)
Other movements	0	(3)
Financial liabilities at end of period	(494)	(631)
Other financials liabilities
Disclosure of financial liabilities [line items]
Financial liabilities at beginning of period	(418)	(277)
Cash movement	0	4
Business acquisi- tions/ disposals	(44)	0
Foreign exchange changes	19	17
Fair value changes	(81)	108
Other movements	11	270
Financial liabilities at end of period	(535)	(418)
Overdrafts
Disclosure of financial liabilities [line items]
Cash movement	€ (14)	€ 9

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 25
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard
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Cash adjustments in bank overdrafts

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Gain loss on termination and modifications of leases.

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