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FINANCIAL INSTRUMENTS - Financial Assets and Liabilities by Categories (Details) - EUR (€) € in Millions	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]
Financial assets	€ 670	€ 820
Financial liabilities	3,302	3,247
Trade payables and fixed asset payables
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	1,191	1,087
Borrowings
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	2,056	2,129
Other financial liabilities
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	55	31
At amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	3,247	3,216
At amortized cost | Trade payables and fixed asset payables
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	1,191	1,087
At amortized cost | Borrowings
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	2,056	2,129
At amortized cost | Other financial liabilities
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	0	0
At fair value through profit and loss
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	40	26
At fair value through profit and loss | Trade payables and fixed asset payables
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	0	0
At fair value through profit and loss | Borrowings
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	0	0
At fair value through profit and loss | Other financial liabilities
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	40	26
At fair value through OCI
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	15	5
At fair value through OCI | Trade payables and fixed asset payables
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	0	0
At fair value through OCI | Borrowings
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	0	0
At fair value through OCI | Other financial liabilities
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	15	5
Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Financial assets	166	147
Trade receivables
Disclosure of detailed information about financial instruments [line items]
Financial assets	465	603
Other financial assets
Disclosure of detailed information about financial instruments [line items]
Financial assets	39	70
At amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial assets	166	147
At amortized cost | Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Financial assets	166	147
At amortized cost | Trade receivables
Disclosure of detailed information about financial instruments [line items]
Financial assets	0	0
At amortized cost | Other financial assets
Disclosure of detailed information about financial instruments [line items]
Financial assets	0	0
At fair value through profit and loss
Disclosure of detailed information about financial instruments [line items]
Financial assets	37	70
At fair value through profit and loss | Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Financial assets	0	0
At fair value through profit and loss | Trade receivables
Disclosure of detailed information about financial instruments [line items]
Financial assets	0	0
At fair value through profit and loss | Other financial assets
Disclosure of detailed information about financial instruments [line items]
Financial assets	37	70
At fair value through OCI
Disclosure of detailed information about financial instruments [line items]
Financial assets	467	603
At fair value through OCI | Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Financial assets	0	0
At fair value through OCI | Trade receivables
Disclosure of detailed information about financial instruments [line items]
Financial assets	465	603
At fair value through OCI | Other financial assets
Disclosure of detailed information about financial instruments [line items]
Financial assets	€ 2	€ 0

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) 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 receive 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 the entity’s own equity instruments do not include puttable financial instruments 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. [Refer: Financial instruments, class [member]; Financial liabilities]

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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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