Financial risk management - Liquidity risk (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017
Risk management
Carrying amount	€ 3,822	€ 3,766
Revolving Credit Facility
Risk management
Notional	1,579
Liquidity risk \| Revolving Credit Facility
Risk management
Notional	1,579	€ 1,579
Liquidity risk \| Euro Medium-Term Note Program
Risk management
Notional	5,000
Carrying amount	1,250
Liquidity risk \| Local commercial paper program in Finland
Risk management
Notional	€ 750

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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 55
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+ Details

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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 nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

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- Details

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- Details

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- Details

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