Property, Plant, and Equipment - Summary (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Useful Lives of Property, Plant, and Equipment
Additions (other than those from business combinations)	€ 810	€ 1,129
Property, plant, and equipment	4,276	4,934
Land and Buildings
Useful Lives of Property, Plant, and Equipment
Additions (other than those from business combinations)	58	46
Property, plant, and equipment	1,430	1,585
Land and Buildings Leased
Useful Lives of Property, Plant, and Equipment
Additions (other than those from business combinations)	102	399
Property, plant, and equipment	1,320	1,758
Other Property, Plant and Equipment
Useful Lives of Property, Plant, and Equipment
Additions (other than those from business combinations)	470	567
Property, plant, and equipment	1,309	1,406
Other Property, Plant and Equipment Leased
Useful Lives of Property, Plant, and Equipment
Additions (other than those from business combinations)	82	30
Property, plant, and equipment	55	43
Advance Payments and Construction in Progress
Useful Lives of Property, Plant, and Equipment
Additions (other than those from business combinations)	98	87
Property, plant, and equipment	€ 162	€ 142

The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2023-01-01
-Paragraph 73
-Subparagraph e
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_e_i&doctype=Standard
-URIDate 2023-03-23

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- 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.

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- Definition

The amount of property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 54
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_a&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 16
-IssueDate 2023-01-01
-Paragraph 73
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_a&doctype=Standard
-URIDate 2023-03-23

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