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Trade and other receivables - Additional Information (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Trade and other receivables [abstract]
Allowance for bad and doubtful debts as a percentage of gross trade accounts receivables	0.50%	0.60%	1.00%
Plans in surplus	£ 18	£ 14

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- References

No definition available.

+ Details

Name:	ifrs-full_TradeAndOtherReceivablesAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Allowance for bad and doubtful debts percentage.

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No definition available.

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Name:	wpp_AllowanceForBadAndDoubtfulDebtsPercentage
Namespace Prefix:	wpp_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

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- Definition

Plans in surplus.

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No definition available.

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Name:	wpp_PlansInSurplus
Namespace Prefix:	wpp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant