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Cash and cash equivalents and debt financing - Summary of Analysis of Cash Flows (Detail) - GBP (£) £ in Millions		Jun. 30, 2021	Dec. 31, 2020
Cash flows from (used in) operating activities [abstract]
Cash at bank and in hand		£ 1,704.1	£ 10,075.0
Short-term bank deposits		1,842.0	2,824.1
Overdrafts	[1]	(199.2)	(8,562.0)
Cash and cash equivalents		£ 3,346.9	£ 4,337.1
[1] Bank overdrafts are included in cash and cash equivalents because they form an integral part of the Group’s cash management.

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- Definition

The amount that has been withdrawn from an account in excess of existing cash balances.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]

+ References

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

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Number 7
-IssueDate 2020-01-01
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- References

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- Definition

A classification of cash equivalents representing short-term deposits. [Refer: Cash equivalents]

+ References

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- Definition

Cash and cash equivalents classified not part of disposal group held for sale.

+ References

No definition available.

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