Property, Plant, and Equipment - Summary (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Useful Lives of Property, Plant, and Equipment
Property, plant, and equipment	€ 5,496	€ 3,553
Additions (other than those from business combinations)	1,067	1,302
Land and buildings
Useful Lives of Property, Plant, and Equipment
Property, plant, and equipment	1,537	1,344
Additions (other than those from business combinations)	85	199
Land and Buildings Leased
Useful Lives of Property, Plant, and Equipment
Property, plant, and equipment	1,929
Additions (other than those from business combinations)	360
Other Property, Plant and Equipment
Useful Lives of Property, Plant, and Equipment
Property, plant, and equipment	1,956	1,985
Additions (other than those from business combinations)	586	1,026
Other Property, Plant and Equipment Leased
Useful Lives of Property, Plant, and Equipment
Property, plant, and equipment	38
Additions (other than those from business combinations)	19
Advance Payments and Construction in Progress
Useful Lives of Property, Plant, and Equipment
Property, plant, and equipment	36	224
Additions (other than those from business combinations)	€ 17	€ 77

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 2019-01-01
-Paragraph 73
-Subparagraph e
-Clause i
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-URIDate 2019-03-27

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- Definition

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

+ References

No definition available.

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The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2019-01-01
-Paragraph 73
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2019-03-27

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