Operating profit/(loss) - Remuneration of Group's auditor (Details) - EUR (€) € in Millions	12 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Remuneration of Group's auditor
Audit fees	€ 20	€ 22	€ 17
Vantage Towers IPO2	8	5
Audit-related	0	1	2
Corporate finance	0	1
Non-audit fees	8	7	2
Total fees	28	29	19
Increase in audit fees		2
Parent company
Remuneration of Group's auditor
Audit fees	3	4	2
Subsidiaries
Remuneration of Group's auditor
Audit fees	16	17	14
Subsidiaries \| New accounting standards
Remuneration of Group's auditor
Audit fees	0	€ 1	€ 1
Subsidiaries \| Vantage Towers
Remuneration of Group's auditor
Audit fees	€ 1

The amount of fees paid or payable to the entity's auditors.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
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-URIDate 2020-01-01

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- Definition

The amount of fees paid or payable to the entity's auditors for auditing services.

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- Definition

The amount of fees paid or payable to the entity's auditors for audit related services.

+ References

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The amount of fees paid or payable to the entity's auditors for corporate finance services.

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- Definition

The amount of fees paid or payable to the entity's auditors for IPO related services.

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The amount of fees paid or payable to the entity's auditors for non-audit services.

+ References

No definition available.

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Represents the amount of increase in audit fees.

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