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Accounting policies - Basis of Preparation (Details) - GBP (£) £ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Net current liabilities	£ (2,307.2)	£ (2,610.0)
Revenue less pass-through cost	31.00%

X

- Definition

The amount of current assets less the amount of current liabilities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard
-URIDate 2023-03-23

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Accounting Policies

+ References

No definition available.

+ Details

Name:	wpp_AccountingPoliciesAbstract
Namespace Prefix:	wpp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Modeling Analysis, Extreme Scenario, Percentage Weakening in Costs

+ References

No definition available.

+ Details

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Namespace Prefix:	wpp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant