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Cash and cash equivalents and debt financing - Cash reconciliation (Detail) - GBP (£) £ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Cash and cash equivalents and debt financing [Abstract]
Cash at bank and in hand	£ 1,679.6	£ 2,776.6
Short-term bank deposits	95.4	1,106.3
Overdrafts	(285.7)	(342.3)
Cash and cash equivalents	£ 1,489.3	£ 3,540.6	£ 3,346.9	£ 4,337.1

X

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The amount that has been withdrawn from an account in excess of existing cash balances.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

- 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

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

- Definition

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

+ References

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- Definition

Cash and cash equivalents and debt financing

+ References

No definition available.

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