Revenue - Contract Balances (Details) - EUR (€) € in Billions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Revenue
Contract liabilities at beginning of period	€ 4.0
Increases resulting from billing and invoices becoming due	8.8
Decreases resulting from satisfaction of performance obligations	(9.0)
Other	0.6
Contract liabilities at end of period	4.4	€ 4.0
Decreases resulting from payments received in advance for cancelable contracts	0.2
Revenue that was included in contract liability balance at beginning of period	€ 3.6	€ 3.5

The amount of an entity’s obligation to transfer goods or services to a customer for which the entity has received consideration (or the amount is due) from the customer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Balance Type:	credit
Period Type:	instant

- Definition

The decrease in contract liabilities resulting from the performance obligation being satisfied. [Refer: Contract liabilities; Performance obligations [member]]

+ References

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-Name IFRS
-Number 15
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-Paragraph 118
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- Definition

The increase (decrease) in contract liabilities resulting from cumulative catch-up adjustments to revenue arising from a contract modification. A contract modification is a change in the scope or price (or both) of a contract that is approved by the parties to the contract. [Refer: Increase (decrease) through cumulative catch-up adjustments to revenue, contract liabilities]

+ References

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-Name IFRS
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- References

No definition available.

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- Definition

The amount of revenue that was included in the contract liability balance at the beginning of the period. [Refer: Contract liabilities; Revenue from contracts with customers]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2021-01-01
-Paragraph 116
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- Definition

The increase (decrease) in contract liabilities, other. Other includes, for example, the impact of foreign currency translation and business acquisition.

+ References

No definition available.

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- Definition

The increase in contract liabilities resulting from billing and invoices becoming due.

+ References

No definition available.

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