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Debt, Cash and Cash Equivalents - Summary of Market Value of Net Debt (Details) - EUR (€) € in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about borrowings [Line Items]
Market value	€ 21,918	€ 16,531
Market value
Disclosure of detailed information about borrowings [Line Items]
Market value	14,214	7,086
Value on redemption
Disclosure of detailed information about borrowings [Line Items]
Market value	21,952	16,573
Value on redemption	€ 15,146	€ 7,835

X

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard
-URIDate 2023-03-23

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Definition

Redemption of debt instrument issued.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

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- Details

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- Details

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