Property, Plant, and Equipment - Summary (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Useful Lives of Property, Plant, and Equipment
Property, plant and equipment	€ 3,553	€ 2,967
Additions (other than those from business combinations)	1,302	1,196
Land and Buildings
Useful Lives of Property, Plant, and Equipment
Property, plant and equipment	1,344	1,162
Additions (other than those from business combinations)	199	96
Other Property, Plant and Equipment
Useful Lives of Property, Plant, and Equipment
Property, plant and equipment	1,985	1,592
Additions (other than those from business combinations)	1,026	933
Advance Payments and Construction in Progress
Useful Lives of Property, Plant, and Equipment
Property, plant and equipment	224	213
Additions (other than those from business combinations)	€ 77	€ 167

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 2018-01-01
-Paragraph 73
-Subparagraph e
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e_i&doctype=Standard
-URIDate 2018-03-16

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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.

+ Details

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- Definition

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 2018-01-01
-Paragraph 73
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Number 1
-IssueDate 2018-01-01
-Paragraph 54
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_a&doctype=Standard
-URIDate 2018-03-16

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