Purchased, outsourced and other costs - Summary of Lease Expenses (Detail) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Lease Expenses [Abstract]
Rent reductions	€ 12,877	€ 24,931
Variable lease payments	(63,421)	(54,665)	€ (63,361)
Expenses relating to short-term leases	(5,697)	(2,260)	(4,029)
Expenses relating to low value leases	(104)	(761)	(858)
Total lease expenses	€ (56,345)	€ (32,755)	€ (68,248)

The amount of the expense relating to leases of low-value assets accounted for applying paragraph 6 of IFRS 16. This expense shall not include the expense relating to short-term leases of low-value assets.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2022-03-24
-Paragraph 53
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_53_d&doctype=Standard
-URIDate 2022-03-24

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- Definition

The amount of the expense relating to short-term leases accounted for applying paragraph 6 of IFRS 16. This expense need not include the expense relating to leases with a lease term of one month or less. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2022-03-24
-Paragraph 53
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_53_c&doctype=Standard
-URIDate 2022-03-24

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- Definition

The amount of the expense relating to variable lease payments not included in the measurement of lease liabilities. Variable lease payments are the portion of payments made by a lessee to a lessor for the right to use an underlying asset during the lease term that varies because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2022-03-24
-Paragraph 53
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_53_e&doctype=Standard
-URIDate 2022-03-24

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- Definition

Disclosure of lease expenses.

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No definition available.

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- Definition

Lease expenses.

+ References

No definition available.

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- Definition

Rent reductions.

+ References

No definition available.

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Balance Type:	debit
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