Cash and cash equivalents (Details) - EUR (€) € in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash and cash equivalents
Cash at bank and in hand	€ 2,705	€ 2,220
Repurchase agreements and bank deposits	0	2,202
Money market funds	3,116	9,135
Cash and cash equivalents as presented in the statement of financial position	5,821	13,557
Bank overdrafts	(31)	(269)
Cash and cash equivalents as presented in the statement of cash flows	5,790	13,288	€ 13,605	€ 5,394
Restricted cash and cash equivalents	1,741	1,460
Cash and cash equivalents presented in assets held for sale	273
Cash balance that can be used to repay intercompany liabilities	€ 879	€ 885

The amount that has been withdrawn from an account in excess of existing cash balances. This is considered a short-term extension of credit by the bank. [Refer: Cash and cash equivalents]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of cash on hand and demand deposits. [Refer: Cash on hand]

+ References

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- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of cash and cash equivalents that are classified as a part of a disposal group held for sale. [Refer: Cash and cash equivalents; Disposal groups classified as held for sale [member]]

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- Definition

The amount of cash and cash equivalents in the statement of cash flows when different from the amount of cash and cash equivalents in the statement of financial position. [Refer: Cash and cash equivalents]

+ References

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- Definition

The amount of short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value.

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- Definition

The amount of cash and cash equivalents whose use or withdrawal is restricted. [Refer: Cash and cash equivalents]

+ References

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- Definition

Represents the amount of cash balance that can be used to repay intercompany liabilities.

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No definition available.

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- Definition

The amount of repurchase agreements under cash and cash equivalents.

+ References

No definition available.

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