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Trade and other receivables - Summary of Trade and Other Receivables, Amounts Falling Due Within One Year (Detail) - GBP (£) £ in Millions	Jun. 30, 2021	Dec. 31, 2020
Trade and other current receivables [abstract]
Trade receivables (net of bad debt provision)	£ 5,877.1	£ 6,572.2
Work in progress	279.1	264.1
VAT and sales taxes recoverable	284.4	236.6
Prepayments	265.6	248.1
Accrued income	3,023.4	3,150.1
Fair value of derivatives	1.8	0.2
Other debtors	493.1	501.0
Trade and other receivables	£ 10,224.5	£ 10,972.3

X

- Definition

The amount of current accrued income. [Refer: Accrued income]

+ References

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

- Definition

The amount of current derivative financial assets. [Refer: Derivative financial assets]

+ References

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- Definition

The amount of current prepayments. [Refer: Prepayments]

+ References

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X

- Definition

The amount of current receivables from contracts with customers. [Refer: Receivables from contracts with customers]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2020-01-01
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- Definition

The amount of current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax]

+ References

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

The amount of current other receivables. [Refer: Other receivables]

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- Definition

The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables]

+ References

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No definition available.

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- Definition

Outlays incurred on behalf of clients, including production costs, and other third-party costs that have not yet been billed and are considered receivables under IFRS 15.

+ References

No definition available.

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